diff --git a/.eslintrc.json b/.eslintrc.json
new file mode 100644
index 0000000..f8d4494
--- /dev/null
+++ b/.eslintrc.json
@@ -0,0 +1,40 @@
+{
+  "parser": "babel-eslint",
+  "plugins": [
+    "eslint-plugin-flowtype"
+  ],
+  "env": {
+			"es6": true,
+			"node": true
+	},
+	"extends": [
+    "eslint:recommended",
+    "plugin:flowtype/recommended"
+  ],
+	"rules": {
+			"indent": [
+					"error",
+					2
+			],
+			"linebreak-style": [
+					"error",
+					"unix"
+			],
+			"quotes": [
+					"error",
+					"double"
+			],
+			"semi": [
+					"error",
+					"always"
+			],
+      "flowtype/space-before-type-colon": 0,
+      "no-undef": 0,
+      "no-unused-vars": 0
+	},
+	"settings": {
+		"flowtype": {
+			"onlyFilesWithFlowAnnotation": true
+		}
+	}
+}
diff --git a/.gitignore b/.gitignore
index a6ec74b..b4e253f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules/
+lib/
 *.swp
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..9af64ac
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,8 @@
+language: node_js
+node_js:
+  - "7"
+
+install:
+  - npm install
+script:
+  - npm run check
diff --git a/flow-typed/npm/bcoin_vx.x.x.js b/flow-typed/npm/bcoin_vx.x.x.js
index cd32081..c6663cc 100644
--- a/flow-typed/npm/bcoin_vx.x.x.js
+++ b/flow-typed/npm/bcoin_vx.x.x.js
@@ -1,1670 +1,103 @@
-// flow-typed signature: 52ec7d952e23091ff45f80adada48ac0
-// flow-typed version: <<STUB>>/bcoin_v^1.0.0-beta.12/flow_v0.45.0
+// This is a work-in-progress attempt to type the bcoin library.
 
-/**
- * This is an autogenerated libdef stub for:
- *
- *   'bcoin'
- *
- * Fill this stub out by replacing all the `any` types.
- *
- * Once filled out, we encourage you to share your work with the
- * community by sending a pull request to:
- * https://github.com/flowtype/flow-typed
- */
+type Hash = (string | Buffer);
+type Network = any;
 
-declare module 'bcoin' {
-  declare module.exports: any;
-}
-
-/**
- * We include stubs for each file inside this npm package in case you need to
- * require those files directly. Feel free to delete any files that aren't
- * needed.
- */
-declare module 'bcoin/browser/empty' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/browser/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/browser/server' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/browser/transform' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/browser/wsproxy' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/examples/chain' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/examples/client' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/examples/miner' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/examples/node' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/examples/peer' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/examples/plugin' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/examples/tx' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/examples/wallet' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bcoin' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bip70/certs' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bip70/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bip70/payment' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bip70/paymentack' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bip70/paymentdetails' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bip70/paymentrequest' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bip70/pk' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/bip70/x509' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/blockchain/chain' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/blockchain/chaindb' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/blockchain/chainentry' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/blockchain/common' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/blockchain/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/blockchain/layout-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/blockchain/layout' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/btc/amount' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/btc/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/btc/uri' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/coins/coins' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/coins/coinview' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/coins/compress' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/coins/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/coins/undocoins' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/aes' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/backend-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/backend' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/chachapoly' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/crypto' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/ec-elliptic' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/ec-secp256k1' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/ec' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/pk-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/pk' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/schnorr' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/scrypt' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/sha256' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/crypto/siphash' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/db/backends-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/db/backends' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/db/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/db/ldb' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/db/level' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/db/lowlevelup' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/db/memdb' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/env' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/common' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/hd' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/mnemonic' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/private' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/public' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/wordlist-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/wordlist' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/words/chinese-simplified' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/words/chinese-traditional' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/words/english' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/words/french' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/words/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/words/italian' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/words/japanese' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/hd/words/spanish' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/base' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/client' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/request' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/rpc' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/rpcbase' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/rpcclient' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/server' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/http/wallet' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mempool/fees' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mempool/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mempool/layout-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mempool/layout' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mempool/mempool' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mempool/mempoolentry' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mining/common' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mining/cpuminer' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mining/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mining/mine' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mining/miner' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/mining/template' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/bip150' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/bip151' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/bip152' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/common' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/dns-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/dns' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/framer' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/hostlist' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/packets' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/parser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/peer' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/pool' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/proxysocket' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/seeds/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/seeds/main' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/seeds/testnet' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/socks' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/tcp-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/tcp' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/upnp-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/net/upnp' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/node/config' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/node/fullnode' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/node/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/node/logger' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/node/node' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/node/nodeclient' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/node/spvnode' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/pkg' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/abstractblock' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/address' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/block' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/coin' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/headers' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/input' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/invitem' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/keyring' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/memblock' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/merkleblock' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/mtx' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/netaddress' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/outpoint' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/output' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/tx' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/primitives/txmeta' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/protocol/consensus' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/protocol/errors' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/protocol/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/protocol/network' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/protocol/networks' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/protocol/policy' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/protocol/timedata' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/common' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/opcode' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/program' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/script' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/scriptnum' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/sigcache' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/stack' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/script/witness' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/types' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/asn1' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/asyncemitter' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/asyncobject' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/base32' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/base58' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/bloom' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/co' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/encoding' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/fs' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/heap' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/ip' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/lazy-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/lazy' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/list' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/lock' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/lru' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/map' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/murmur3' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/native' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/nexttick-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/nexttick' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/nfkd-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/nfkd' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/pem' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/protobuf' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/rbt' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/reader' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/staticwriter' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/util' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/validator' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/utils/writer' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/account' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/client' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/common' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/http' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/layout-browser' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/layout' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/masterkey' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/path' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/plugin' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/records' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/rpc' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/server' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/txdb' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/wallet' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/walletdb' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/wallet/walletkey' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/workers/framer' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/workers/index' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/workers/jobs' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/workers/master' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/workers/packets' {
-  declare module.exports: any;
-}
-
-declare module 'bcoin/lib/workers/parser-client' {
-  declare module.exports: any;
+declare class bcoin$FullNode {
+  on(eventName : string, eventHandler : Function) : void;
+  getTX(hash : Hash) : Promise<bcoin$TX>;
+  getCoin(hash : Hash, index : number) : bcoin$Coin;
 }
 
-declare module 'bcoin/lib/workers/parser' {
-  declare module.exports: any;
+declare class bcoin$Address {
+  toBase58() : string;
+  hash : Buffer;
+  static fromHash(Hash) : bcoin$Address;
+  static fromBase58(string) : bcoin$Address;
 }
 
-declare module 'bcoin/lib/workers/worker-browser' {
-  declare module.exports: any;
-}
+declare class bcoin$TX {
+  inputs : bcoin$Input[];
+  outputs : bcoin$Output[];
 
-declare module 'bcoin/lib/workers/worker' {
-  declare module.exports: any;
+  hash(enc : ?'hex') : Buffer;
 }
 
-declare module 'bcoin/lib/workers/workerpool' {
-  declare module.exports: any;
-}
 
-declare module 'bcoin/migrate/chaindb0to1' {
-  declare module.exports: any;
-}
+declare class bcoin$MTX {
+  inputs : bcoin$Input[];
+  outputs : bcoin$Output[];
 
-declare module 'bcoin/migrate/chaindb1to2' {
-  declare module.exports: any;
+  toTX : bcoin$TX;
+  template(ring : bcoin$KeyRing) : number;
+  scriptVector(outputScript : bcoin$Script, inputScript : bcoin$Script, ring : bcoin$KeyRing) : boolean;
+  addOutput(output : bcoin$Output) : void;
+  addCoin(coin : bcoin$Coin) : void;
+  sign(ring : bcoin$KeyRing) : number;
+  signInput(index : number, coin : bcoin$Coin, keyRing : bcoin$KeyRing) : boolean;
 }
 
-declare module 'bcoin/migrate/coins-old' {
-  declare module.exports: any;
-}
+declare class bcoin$Output {
+  script : bcoin$Script;
+  value : number;
 
-declare module 'bcoin/migrate/coinview-old' {
-  declare module.exports: any;
+  getType() : ('pubkeyhash' | 'multisig');
+  getAddress() : bcoin$Address;
 }
 
-declare module 'bcoin/migrate/compress-old' {
-  declare module.exports: any;
-}
+declare class bcoin$Input {
+  static fromOutpoint(outpoint : bcoin$Outpoint) : bcoin$Input;
 
-declare module 'bcoin/migrate/ensure-tip-index' {
-  declare module.exports: any;
-}
+  script : bcoin$Script;
+  prevout : bcoin$Outpoint;
 
-declare module 'bcoin/migrate/walletdb2to3' {
-  declare module.exports: any;
+  getType() : ('pubkeyhash' | 'multisig');
+  getAddress() : bcoin$Address;
 }
 
-declare module 'bcoin/migrate/walletdb3to4' {
-  declare module.exports: any;
-}
+declare class bcoin$Script {
+  static fromMultisig(m : number, n : number, keys : Buffer[]) : bcoin$Script;
+  static fromPubkeyhash(hash : Hash) : bcoin$Script;
 
-declare module 'bcoin/migrate/walletdb4to5' {
-  declare module.exports: any;
+  get(n : number) : (Buffer);
 }
 
-declare module 'bcoin/migrate/walletdb5to6' {
-  declare module.exports: any;
+declare class bcoin$Outpoint {
+  hash : Buffer;
+  index : number;
 }
 
-declare module 'bcoin/scripts/dump' {
-  declare module.exports: any;
-}
+declare class bcoin$KeyRing {
+  static fromPrivate(key : Buffer, compressed : ?boolean, network : ?Network) : bcoin$KeyRing;
+  static fromPublic(key : Buffer, network : ?Network) : bcoin$KeyRing;
 
-declare module 'bcoin/scripts/fuzz' {
-  declare module.exports: any;
+  getPublicKey() : Buffer;
+  getPrivateKey() : Buffer;
 }
 
-declare module 'bcoin/scripts/gen' {
-  declare module.exports: any;
+declare class bcoin$Coin extends bcoin$Output {
+  script : bcoin$Script;
+  value : number;
 }
 
-declare module 'bcoin/vendor/setimmediate' {
-  declare module.exports: any;
+declare module 'bcoin' {
+  declare module.exports: {
+    fullnode : Class<bcoin$FullNode>,
+    script : Class<bcoin$Script>,
+    primitives : {
+      Address : Class<bcoin$Address>,
+      TX : Class<bcoin$TX>,
+      MTX : Class<bcoin$MTX>,
+      Output : Class<bcoin$Output>,
+      Input : Class<bcoin$Input>,
+      Outpoint : Class<bcoin$Outpoint>,
+      KeyRing : Class<bcoin$KeyRing>,
+      Coin : Class<bcoin$Coin>
+    },
+    crypto : {
+      hash160(str : (string | Buffer)) : Hash
+    }
+  }
 }
 
-declare module 'bcoin/vendor/unorm' {
-  declare module.exports: any;
-}
 
-// Filename aliases
-declare module 'bcoin/browser/empty.js' {
-  declare module.exports: $Exports<'bcoin/browser/empty'>;
-}
-declare module 'bcoin/browser/index.js' {
-  declare module.exports: $Exports<'bcoin/browser/index'>;
-}
-declare module 'bcoin/browser/server.js' {
-  declare module.exports: $Exports<'bcoin/browser/server'>;
-}
-declare module 'bcoin/browser/transform.js' {
-  declare module.exports: $Exports<'bcoin/browser/transform'>;
-}
-declare module 'bcoin/browser/wsproxy.js' {
-  declare module.exports: $Exports<'bcoin/browser/wsproxy'>;
-}
-declare module 'bcoin/examples/chain.js' {
-  declare module.exports: $Exports<'bcoin/examples/chain'>;
-}
-declare module 'bcoin/examples/client.js' {
-  declare module.exports: $Exports<'bcoin/examples/client'>;
-}
-declare module 'bcoin/examples/miner.js' {
-  declare module.exports: $Exports<'bcoin/examples/miner'>;
-}
-declare module 'bcoin/examples/node.js' {
-  declare module.exports: $Exports<'bcoin/examples/node'>;
-}
-declare module 'bcoin/examples/peer.js' {
-  declare module.exports: $Exports<'bcoin/examples/peer'>;
-}
-declare module 'bcoin/examples/plugin.js' {
-  declare module.exports: $Exports<'bcoin/examples/plugin'>;
-}
-declare module 'bcoin/examples/tx.js' {
-  declare module.exports: $Exports<'bcoin/examples/tx'>;
-}
-declare module 'bcoin/examples/wallet.js' {
-  declare module.exports: $Exports<'bcoin/examples/wallet'>;
-}
-declare module 'bcoin/lib/bcoin.js' {
-  declare module.exports: $Exports<'bcoin/lib/bcoin'>;
-}
-declare module 'bcoin/lib/bip70/certs.js' {
-  declare module.exports: $Exports<'bcoin/lib/bip70/certs'>;
-}
-declare module 'bcoin/lib/bip70/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/bip70/index'>;
-}
-declare module 'bcoin/lib/bip70/payment.js' {
-  declare module.exports: $Exports<'bcoin/lib/bip70/payment'>;
-}
-declare module 'bcoin/lib/bip70/paymentack.js' {
-  declare module.exports: $Exports<'bcoin/lib/bip70/paymentack'>;
-}
-declare module 'bcoin/lib/bip70/paymentdetails.js' {
-  declare module.exports: $Exports<'bcoin/lib/bip70/paymentdetails'>;
-}
-declare module 'bcoin/lib/bip70/paymentrequest.js' {
-  declare module.exports: $Exports<'bcoin/lib/bip70/paymentrequest'>;
-}
-declare module 'bcoin/lib/bip70/pk.js' {
-  declare module.exports: $Exports<'bcoin/lib/bip70/pk'>;
-}
-declare module 'bcoin/lib/bip70/x509.js' {
-  declare module.exports: $Exports<'bcoin/lib/bip70/x509'>;
-}
-declare module 'bcoin/lib/blockchain/chain.js' {
-  declare module.exports: $Exports<'bcoin/lib/blockchain/chain'>;
-}
-declare module 'bcoin/lib/blockchain/chaindb.js' {
-  declare module.exports: $Exports<'bcoin/lib/blockchain/chaindb'>;
-}
-declare module 'bcoin/lib/blockchain/chainentry.js' {
-  declare module.exports: $Exports<'bcoin/lib/blockchain/chainentry'>;
-}
-declare module 'bcoin/lib/blockchain/common.js' {
-  declare module.exports: $Exports<'bcoin/lib/blockchain/common'>;
-}
-declare module 'bcoin/lib/blockchain/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/blockchain/index'>;
-}
-declare module 'bcoin/lib/blockchain/layout-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/blockchain/layout-browser'>;
-}
-declare module 'bcoin/lib/blockchain/layout.js' {
-  declare module.exports: $Exports<'bcoin/lib/blockchain/layout'>;
-}
-declare module 'bcoin/lib/btc/amount.js' {
-  declare module.exports: $Exports<'bcoin/lib/btc/amount'>;
-}
-declare module 'bcoin/lib/btc/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/btc/index'>;
-}
-declare module 'bcoin/lib/btc/uri.js' {
-  declare module.exports: $Exports<'bcoin/lib/btc/uri'>;
-}
-declare module 'bcoin/lib/coins/coins.js' {
-  declare module.exports: $Exports<'bcoin/lib/coins/coins'>;
-}
-declare module 'bcoin/lib/coins/coinview.js' {
-  declare module.exports: $Exports<'bcoin/lib/coins/coinview'>;
-}
-declare module 'bcoin/lib/coins/compress.js' {
-  declare module.exports: $Exports<'bcoin/lib/coins/compress'>;
-}
-declare module 'bcoin/lib/coins/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/coins/index'>;
-}
-declare module 'bcoin/lib/coins/undocoins.js' {
-  declare module.exports: $Exports<'bcoin/lib/coins/undocoins'>;
-}
-declare module 'bcoin/lib/crypto/aes.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/aes'>;
-}
-declare module 'bcoin/lib/crypto/backend-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/backend-browser'>;
-}
-declare module 'bcoin/lib/crypto/backend.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/backend'>;
-}
-declare module 'bcoin/lib/crypto/chachapoly.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/chachapoly'>;
-}
-declare module 'bcoin/lib/crypto/crypto.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/crypto'>;
-}
-declare module 'bcoin/lib/crypto/ec-elliptic.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/ec-elliptic'>;
-}
-declare module 'bcoin/lib/crypto/ec-secp256k1.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/ec-secp256k1'>;
-}
-declare module 'bcoin/lib/crypto/ec.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/ec'>;
-}
-declare module 'bcoin/lib/crypto/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/index'>;
-}
-declare module 'bcoin/lib/crypto/pk-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/pk-browser'>;
-}
-declare module 'bcoin/lib/crypto/pk.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/pk'>;
-}
-declare module 'bcoin/lib/crypto/schnorr.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/schnorr'>;
-}
-declare module 'bcoin/lib/crypto/scrypt.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/scrypt'>;
-}
-declare module 'bcoin/lib/crypto/sha256.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/sha256'>;
-}
-declare module 'bcoin/lib/crypto/siphash.js' {
-  declare module.exports: $Exports<'bcoin/lib/crypto/siphash'>;
-}
-declare module 'bcoin/lib/db/backends-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/db/backends-browser'>;
-}
-declare module 'bcoin/lib/db/backends.js' {
-  declare module.exports: $Exports<'bcoin/lib/db/backends'>;
-}
-declare module 'bcoin/lib/db/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/db/index'>;
-}
-declare module 'bcoin/lib/db/ldb.js' {
-  declare module.exports: $Exports<'bcoin/lib/db/ldb'>;
-}
-declare module 'bcoin/lib/db/level.js' {
-  declare module.exports: $Exports<'bcoin/lib/db/level'>;
-}
-declare module 'bcoin/lib/db/lowlevelup.js' {
-  declare module.exports: $Exports<'bcoin/lib/db/lowlevelup'>;
-}
-declare module 'bcoin/lib/db/memdb.js' {
-  declare module.exports: $Exports<'bcoin/lib/db/memdb'>;
-}
-declare module 'bcoin/lib/env.js' {
-  declare module.exports: $Exports<'bcoin/lib/env'>;
-}
-declare module 'bcoin/lib/hd/common.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/common'>;
-}
-declare module 'bcoin/lib/hd/hd.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/hd'>;
-}
-declare module 'bcoin/lib/hd/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/index'>;
-}
-declare module 'bcoin/lib/hd/mnemonic.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/mnemonic'>;
-}
-declare module 'bcoin/lib/hd/private.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/private'>;
-}
-declare module 'bcoin/lib/hd/public.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/public'>;
-}
-declare module 'bcoin/lib/hd/wordlist-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/wordlist-browser'>;
-}
-declare module 'bcoin/lib/hd/wordlist.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/wordlist'>;
-}
-declare module 'bcoin/lib/hd/words/chinese-simplified.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/words/chinese-simplified'>;
-}
-declare module 'bcoin/lib/hd/words/chinese-traditional.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/words/chinese-traditional'>;
-}
-declare module 'bcoin/lib/hd/words/english.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/words/english'>;
-}
-declare module 'bcoin/lib/hd/words/french.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/words/french'>;
-}
-declare module 'bcoin/lib/hd/words/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/words/index'>;
-}
-declare module 'bcoin/lib/hd/words/italian.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/words/italian'>;
-}
-declare module 'bcoin/lib/hd/words/japanese.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/words/japanese'>;
-}
-declare module 'bcoin/lib/hd/words/spanish.js' {
-  declare module.exports: $Exports<'bcoin/lib/hd/words/spanish'>;
-}
-declare module 'bcoin/lib/http/base.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/base'>;
-}
-declare module 'bcoin/lib/http/client.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/client'>;
-}
-declare module 'bcoin/lib/http/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/index'>;
-}
-declare module 'bcoin/lib/http/request.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/request'>;
-}
-declare module 'bcoin/lib/http/rpc.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/rpc'>;
-}
-declare module 'bcoin/lib/http/rpcbase.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/rpcbase'>;
-}
-declare module 'bcoin/lib/http/rpcclient.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/rpcclient'>;
-}
-declare module 'bcoin/lib/http/server.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/server'>;
-}
-declare module 'bcoin/lib/http/wallet.js' {
-  declare module.exports: $Exports<'bcoin/lib/http/wallet'>;
-}
-declare module 'bcoin/lib/mempool/fees.js' {
-  declare module.exports: $Exports<'bcoin/lib/mempool/fees'>;
-}
-declare module 'bcoin/lib/mempool/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/mempool/index'>;
-}
-declare module 'bcoin/lib/mempool/layout-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/mempool/layout-browser'>;
-}
-declare module 'bcoin/lib/mempool/layout.js' {
-  declare module.exports: $Exports<'bcoin/lib/mempool/layout'>;
-}
-declare module 'bcoin/lib/mempool/mempool.js' {
-  declare module.exports: $Exports<'bcoin/lib/mempool/mempool'>;
-}
-declare module 'bcoin/lib/mempool/mempoolentry.js' {
-  declare module.exports: $Exports<'bcoin/lib/mempool/mempoolentry'>;
-}
-declare module 'bcoin/lib/mining/common.js' {
-  declare module.exports: $Exports<'bcoin/lib/mining/common'>;
-}
-declare module 'bcoin/lib/mining/cpuminer.js' {
-  declare module.exports: $Exports<'bcoin/lib/mining/cpuminer'>;
-}
-declare module 'bcoin/lib/mining/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/mining/index'>;
-}
-declare module 'bcoin/lib/mining/mine.js' {
-  declare module.exports: $Exports<'bcoin/lib/mining/mine'>;
-}
-declare module 'bcoin/lib/mining/miner.js' {
-  declare module.exports: $Exports<'bcoin/lib/mining/miner'>;
-}
-declare module 'bcoin/lib/mining/template.js' {
-  declare module.exports: $Exports<'bcoin/lib/mining/template'>;
-}
-declare module 'bcoin/lib/net/bip150.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/bip150'>;
-}
-declare module 'bcoin/lib/net/bip151.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/bip151'>;
-}
-declare module 'bcoin/lib/net/bip152.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/bip152'>;
-}
-declare module 'bcoin/lib/net/common.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/common'>;
-}
-declare module 'bcoin/lib/net/dns-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/dns-browser'>;
-}
-declare module 'bcoin/lib/net/dns.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/dns'>;
-}
-declare module 'bcoin/lib/net/framer.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/framer'>;
-}
-declare module 'bcoin/lib/net/hostlist.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/hostlist'>;
-}
-declare module 'bcoin/lib/net/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/index'>;
-}
-declare module 'bcoin/lib/net/packets.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/packets'>;
-}
-declare module 'bcoin/lib/net/parser.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/parser'>;
-}
-declare module 'bcoin/lib/net/peer.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/peer'>;
-}
-declare module 'bcoin/lib/net/pool.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/pool'>;
-}
-declare module 'bcoin/lib/net/proxysocket.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/proxysocket'>;
-}
-declare module 'bcoin/lib/net/seeds/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/seeds/index'>;
-}
-declare module 'bcoin/lib/net/seeds/main.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/seeds/main'>;
-}
-declare module 'bcoin/lib/net/seeds/testnet.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/seeds/testnet'>;
-}
-declare module 'bcoin/lib/net/socks.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/socks'>;
-}
-declare module 'bcoin/lib/net/tcp-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/tcp-browser'>;
-}
-declare module 'bcoin/lib/net/tcp.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/tcp'>;
-}
-declare module 'bcoin/lib/net/upnp-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/upnp-browser'>;
-}
-declare module 'bcoin/lib/net/upnp.js' {
-  declare module.exports: $Exports<'bcoin/lib/net/upnp'>;
-}
-declare module 'bcoin/lib/node/config.js' {
-  declare module.exports: $Exports<'bcoin/lib/node/config'>;
-}
-declare module 'bcoin/lib/node/fullnode.js' {
-  declare module.exports: $Exports<'bcoin/lib/node/fullnode'>;
-}
-declare module 'bcoin/lib/node/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/node/index'>;
-}
-declare module 'bcoin/lib/node/logger.js' {
-  declare module.exports: $Exports<'bcoin/lib/node/logger'>;
-}
-declare module 'bcoin/lib/node/node.js' {
-  declare module.exports: $Exports<'bcoin/lib/node/node'>;
-}
-declare module 'bcoin/lib/node/nodeclient.js' {
-  declare module.exports: $Exports<'bcoin/lib/node/nodeclient'>;
-}
-declare module 'bcoin/lib/node/spvnode.js' {
-  declare module.exports: $Exports<'bcoin/lib/node/spvnode'>;
-}
-declare module 'bcoin/lib/pkg.js' {
-  declare module.exports: $Exports<'bcoin/lib/pkg'>;
-}
-declare module 'bcoin/lib/primitives/abstractblock.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/abstractblock'>;
-}
-declare module 'bcoin/lib/primitives/address.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/address'>;
-}
-declare module 'bcoin/lib/primitives/block.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/block'>;
-}
-declare module 'bcoin/lib/primitives/coin.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/coin'>;
-}
-declare module 'bcoin/lib/primitives/headers.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/headers'>;
-}
-declare module 'bcoin/lib/primitives/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/index'>;
-}
-declare module 'bcoin/lib/primitives/input.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/input'>;
-}
-declare module 'bcoin/lib/primitives/invitem.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/invitem'>;
-}
-declare module 'bcoin/lib/primitives/keyring.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/keyring'>;
-}
-declare module 'bcoin/lib/primitives/memblock.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/memblock'>;
-}
-declare module 'bcoin/lib/primitives/merkleblock.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/merkleblock'>;
-}
-declare module 'bcoin/lib/primitives/mtx.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/mtx'>;
-}
-declare module 'bcoin/lib/primitives/netaddress.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/netaddress'>;
-}
-declare module 'bcoin/lib/primitives/outpoint.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/outpoint'>;
-}
-declare module 'bcoin/lib/primitives/output.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/output'>;
-}
-declare module 'bcoin/lib/primitives/tx.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/tx'>;
-}
-declare module 'bcoin/lib/primitives/txmeta.js' {
-  declare module.exports: $Exports<'bcoin/lib/primitives/txmeta'>;
-}
-declare module 'bcoin/lib/protocol/consensus.js' {
-  declare module.exports: $Exports<'bcoin/lib/protocol/consensus'>;
-}
-declare module 'bcoin/lib/protocol/errors.js' {
-  declare module.exports: $Exports<'bcoin/lib/protocol/errors'>;
-}
-declare module 'bcoin/lib/protocol/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/protocol/index'>;
-}
-declare module 'bcoin/lib/protocol/network.js' {
-  declare module.exports: $Exports<'bcoin/lib/protocol/network'>;
-}
-declare module 'bcoin/lib/protocol/networks.js' {
-  declare module.exports: $Exports<'bcoin/lib/protocol/networks'>;
-}
-declare module 'bcoin/lib/protocol/policy.js' {
-  declare module.exports: $Exports<'bcoin/lib/protocol/policy'>;
-}
-declare module 'bcoin/lib/protocol/timedata.js' {
-  declare module.exports: $Exports<'bcoin/lib/protocol/timedata'>;
-}
-declare module 'bcoin/lib/script/common.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/common'>;
-}
-declare module 'bcoin/lib/script/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/index'>;
-}
-declare module 'bcoin/lib/script/opcode.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/opcode'>;
-}
-declare module 'bcoin/lib/script/program.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/program'>;
-}
-declare module 'bcoin/lib/script/script.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/script'>;
-}
-declare module 'bcoin/lib/script/scriptnum.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/scriptnum'>;
-}
-declare module 'bcoin/lib/script/sigcache.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/sigcache'>;
-}
-declare module 'bcoin/lib/script/stack.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/stack'>;
-}
-declare module 'bcoin/lib/script/witness.js' {
-  declare module.exports: $Exports<'bcoin/lib/script/witness'>;
-}
-declare module 'bcoin/lib/types.js' {
-  declare module.exports: $Exports<'bcoin/lib/types'>;
-}
-declare module 'bcoin/lib/utils/asn1.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/asn1'>;
-}
-declare module 'bcoin/lib/utils/asyncemitter.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/asyncemitter'>;
-}
-declare module 'bcoin/lib/utils/asyncobject.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/asyncobject'>;
-}
-declare module 'bcoin/lib/utils/base32.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/base32'>;
-}
-declare module 'bcoin/lib/utils/base58.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/base58'>;
-}
-declare module 'bcoin/lib/utils/bloom.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/bloom'>;
-}
-declare module 'bcoin/lib/utils/co.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/co'>;
-}
-declare module 'bcoin/lib/utils/encoding.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/encoding'>;
-}
-declare module 'bcoin/lib/utils/fs.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/fs'>;
-}
-declare module 'bcoin/lib/utils/heap.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/heap'>;
-}
-declare module 'bcoin/lib/utils/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/index'>;
-}
-declare module 'bcoin/lib/utils/ip.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/ip'>;
-}
-declare module 'bcoin/lib/utils/lazy-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/lazy-browser'>;
-}
-declare module 'bcoin/lib/utils/lazy.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/lazy'>;
-}
-declare module 'bcoin/lib/utils/list.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/list'>;
-}
-declare module 'bcoin/lib/utils/lock.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/lock'>;
-}
-declare module 'bcoin/lib/utils/lru.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/lru'>;
-}
-declare module 'bcoin/lib/utils/map.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/map'>;
-}
-declare module 'bcoin/lib/utils/murmur3.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/murmur3'>;
-}
-declare module 'bcoin/lib/utils/native.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/native'>;
-}
-declare module 'bcoin/lib/utils/nexttick-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/nexttick-browser'>;
-}
-declare module 'bcoin/lib/utils/nexttick.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/nexttick'>;
-}
-declare module 'bcoin/lib/utils/nfkd-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/nfkd-browser'>;
-}
-declare module 'bcoin/lib/utils/nfkd.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/nfkd'>;
-}
-declare module 'bcoin/lib/utils/pem.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/pem'>;
-}
-declare module 'bcoin/lib/utils/protobuf.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/protobuf'>;
-}
-declare module 'bcoin/lib/utils/rbt.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/rbt'>;
-}
-declare module 'bcoin/lib/utils/reader.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/reader'>;
-}
-declare module 'bcoin/lib/utils/staticwriter.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/staticwriter'>;
-}
-declare module 'bcoin/lib/utils/util.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/util'>;
-}
-declare module 'bcoin/lib/utils/validator.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/validator'>;
-}
-declare module 'bcoin/lib/utils/writer.js' {
-  declare module.exports: $Exports<'bcoin/lib/utils/writer'>;
-}
-declare module 'bcoin/lib/wallet/account.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/account'>;
-}
-declare module 'bcoin/lib/wallet/client.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/client'>;
-}
-declare module 'bcoin/lib/wallet/common.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/common'>;
-}
-declare module 'bcoin/lib/wallet/http.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/http'>;
-}
-declare module 'bcoin/lib/wallet/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/index'>;
-}
-declare module 'bcoin/lib/wallet/layout-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/layout-browser'>;
-}
-declare module 'bcoin/lib/wallet/layout.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/layout'>;
-}
-declare module 'bcoin/lib/wallet/masterkey.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/masterkey'>;
-}
-declare module 'bcoin/lib/wallet/path.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/path'>;
-}
-declare module 'bcoin/lib/wallet/plugin.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/plugin'>;
-}
-declare module 'bcoin/lib/wallet/records.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/records'>;
-}
-declare module 'bcoin/lib/wallet/rpc.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/rpc'>;
-}
-declare module 'bcoin/lib/wallet/server.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/server'>;
-}
-declare module 'bcoin/lib/wallet/txdb.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/txdb'>;
-}
-declare module 'bcoin/lib/wallet/wallet.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/wallet'>;
-}
-declare module 'bcoin/lib/wallet/walletdb.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/walletdb'>;
-}
-declare module 'bcoin/lib/wallet/walletkey.js' {
-  declare module.exports: $Exports<'bcoin/lib/wallet/walletkey'>;
-}
-declare module 'bcoin/lib/workers/framer.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/framer'>;
-}
-declare module 'bcoin/lib/workers/index.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/index'>;
-}
-declare module 'bcoin/lib/workers/jobs.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/jobs'>;
-}
-declare module 'bcoin/lib/workers/master.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/master'>;
-}
-declare module 'bcoin/lib/workers/packets.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/packets'>;
-}
-declare module 'bcoin/lib/workers/parser-client.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/parser-client'>;
-}
-declare module 'bcoin/lib/workers/parser.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/parser'>;
-}
-declare module 'bcoin/lib/workers/worker-browser.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/worker-browser'>;
-}
-declare module 'bcoin/lib/workers/worker.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/worker'>;
-}
-declare module 'bcoin/lib/workers/workerpool.js' {
-  declare module.exports: $Exports<'bcoin/lib/workers/workerpool'>;
-}
-declare module 'bcoin/migrate/chaindb0to1.js' {
-  declare module.exports: $Exports<'bcoin/migrate/chaindb0to1'>;
-}
-declare module 'bcoin/migrate/chaindb1to2.js' {
-  declare module.exports: $Exports<'bcoin/migrate/chaindb1to2'>;
-}
-declare module 'bcoin/migrate/coins-old.js' {
-  declare module.exports: $Exports<'bcoin/migrate/coins-old'>;
-}
-declare module 'bcoin/migrate/coinview-old.js' {
-  declare module.exports: $Exports<'bcoin/migrate/coinview-old'>;
-}
-declare module 'bcoin/migrate/compress-old.js' {
-  declare module.exports: $Exports<'bcoin/migrate/compress-old'>;
-}
-declare module 'bcoin/migrate/ensure-tip-index.js' {
-  declare module.exports: $Exports<'bcoin/migrate/ensure-tip-index'>;
-}
-declare module 'bcoin/migrate/walletdb2to3.js' {
-  declare module.exports: $Exports<'bcoin/migrate/walletdb2to3'>;
-}
-declare module 'bcoin/migrate/walletdb3to4.js' {
-  declare module.exports: $Exports<'bcoin/migrate/walletdb3to4'>;
-}
-declare module 'bcoin/migrate/walletdb4to5.js' {
-  declare module.exports: $Exports<'bcoin/migrate/walletdb4to5'>;
-}
-declare module 'bcoin/migrate/walletdb5to6.js' {
-  declare module.exports: $Exports<'bcoin/migrate/walletdb5to6'>;
-}
-declare module 'bcoin/scripts/dump.js' {
-  declare module.exports: $Exports<'bcoin/scripts/dump'>;
-}
-declare module 'bcoin/scripts/fuzz.js' {
-  declare module.exports: $Exports<'bcoin/scripts/fuzz'>;
-}
-declare module 'bcoin/scripts/gen.js' {
-  declare module.exports: $Exports<'bcoin/scripts/gen'>;
-}
-declare module 'bcoin/vendor/setimmediate.js' {
-  declare module.exports: $Exports<'bcoin/vendor/setimmediate'>;
-}
-declare module 'bcoin/vendor/unorm.js' {
-  declare module.exports: $Exports<'bcoin/vendor/unorm'>;
-}
diff --git a/flow-typed/npm/graph-theory-ford-fulkerson_vx.x.x.js b/flow-typed/npm/graph-theory-ford-fulkerson_vx.x.x.js
new file mode 100644
index 0000000..983c36c
--- /dev/null
+++ b/flow-typed/npm/graph-theory-ford-fulkerson_vx.x.x.js
@@ -0,0 +1,45 @@
+// flow-typed signature: 2849579ad8dda7785593fce35e7021fd
+// flow-typed version: <<STUB>>/graph-theory-ford-fulkerson_v^1.0.0/flow_v0.45.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'graph-theory-ford-fulkerson'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'graph-theory-ford-fulkerson' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'graph-theory-ford-fulkerson/example/example' {
+  declare module.exports: any;
+}
+
+declare module 'graph-theory-ford-fulkerson/test/index' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'graph-theory-ford-fulkerson/example/example.js' {
+  declare module.exports: $Exports<'graph-theory-ford-fulkerson/example/example'>;
+}
+declare module 'graph-theory-ford-fulkerson/index' {
+  declare module.exports: $Exports<'graph-theory-ford-fulkerson'>;
+}
+declare module 'graph-theory-ford-fulkerson/index.js' {
+  declare module.exports: $Exports<'graph-theory-ford-fulkerson'>;
+}
+declare module 'graph-theory-ford-fulkerson/test/index.js' {
+  declare module.exports: $Exports<'graph-theory-ford-fulkerson/test/index'>;
+}
diff --git a/flow-typed/npm/should-sinon_vx.x.x.js b/flow-typed/npm/should-sinon_vx.x.x.js
new file mode 100644
index 0000000..6de6924
--- /dev/null
+++ b/flow-typed/npm/should-sinon_vx.x.x.js
@@ -0,0 +1,39 @@
+// flow-typed signature: 45843e3ce6bf3afc28721ddbe8e0ce2f
+// flow-typed version: <<STUB>>/should-sinon_v0.0.5/flow_v0.45.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'should-sinon'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'should-sinon' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'should-sinon/should-sinon' {
+  declare module.exports: any;
+}
+
+declare module 'should-sinon/test' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'should-sinon/should-sinon.js' {
+  declare module.exports: $Exports<'should-sinon/should-sinon'>;
+}
+declare module 'should-sinon/test.js' {
+  declare module.exports: $Exports<'should-sinon/test'>;
+}
diff --git a/flow-typed/npm/sinon_vx.x.x.js b/flow-typed/npm/sinon_vx.x.x.js
new file mode 100644
index 0000000..c75f639
--- /dev/null
+++ b/flow-typed/npm/sinon_vx.x.x.js
@@ -0,0 +1,375 @@
+// flow-typed signature: 49be0b929be2f6361f541fdb8e279527
+// flow-typed version: <<STUB>>/sinon_v^2.2.0/flow_v0.45.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'sinon'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'sinon' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'sinon/lib/sinon' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/assert' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/behavior' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/blob' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/call' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/collect-own-methods' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/collection' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/color' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/default-behaviors' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/match' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/mock-expectation' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/mock' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/sandbox' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/spy-formatters' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/spy' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/stub-descriptor' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/stub-entire-object' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/stub-non-function-property' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/stub' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/throw-on-falsy-object' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/called-in-order' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/deep-equal' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/default-config' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/deprecated' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/every' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/extend' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/format' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/function-name' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/function-to-string' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/get-config' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/get-property-descriptor' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/index' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/iterable-to-string' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/log_error' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/order-by-first-call' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/restore' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/times-in-words' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/typeOf' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/value-to-string' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/walk' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/core/wrap-method' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/event' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/fake_server_with_clock' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/fake_server' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/fake_timers' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/lib/sinon/util/fake_xml_http_request' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/pkg/sinon-2.2.0' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/pkg/sinon-no-sourcemaps-2.2.0' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/pkg/sinon-no-sourcemaps' {
+  declare module.exports: any;
+}
+
+declare module 'sinon/pkg/sinon' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'sinon/lib/sinon.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon'>;
+}
+declare module 'sinon/lib/sinon/assert.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/assert'>;
+}
+declare module 'sinon/lib/sinon/behavior.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/behavior'>;
+}
+declare module 'sinon/lib/sinon/blob.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/blob'>;
+}
+declare module 'sinon/lib/sinon/call.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/call'>;
+}
+declare module 'sinon/lib/sinon/collect-own-methods.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/collect-own-methods'>;
+}
+declare module 'sinon/lib/sinon/collection.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/collection'>;
+}
+declare module 'sinon/lib/sinon/color.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/color'>;
+}
+declare module 'sinon/lib/sinon/default-behaviors.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/default-behaviors'>;
+}
+declare module 'sinon/lib/sinon/match.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/match'>;
+}
+declare module 'sinon/lib/sinon/mock-expectation.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/mock-expectation'>;
+}
+declare module 'sinon/lib/sinon/mock.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/mock'>;
+}
+declare module 'sinon/lib/sinon/sandbox.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/sandbox'>;
+}
+declare module 'sinon/lib/sinon/spy-formatters.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/spy-formatters'>;
+}
+declare module 'sinon/lib/sinon/spy.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/spy'>;
+}
+declare module 'sinon/lib/sinon/stub-descriptor.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/stub-descriptor'>;
+}
+declare module 'sinon/lib/sinon/stub-entire-object.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/stub-entire-object'>;
+}
+declare module 'sinon/lib/sinon/stub-non-function-property.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/stub-non-function-property'>;
+}
+declare module 'sinon/lib/sinon/stub.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/stub'>;
+}
+declare module 'sinon/lib/sinon/throw-on-falsy-object.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/throw-on-falsy-object'>;
+}
+declare module 'sinon/lib/sinon/util/core/called-in-order.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/called-in-order'>;
+}
+declare module 'sinon/lib/sinon/util/core/deep-equal.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/deep-equal'>;
+}
+declare module 'sinon/lib/sinon/util/core/default-config.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/default-config'>;
+}
+declare module 'sinon/lib/sinon/util/core/deprecated.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/deprecated'>;
+}
+declare module 'sinon/lib/sinon/util/core/every.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/every'>;
+}
+declare module 'sinon/lib/sinon/util/core/extend.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/extend'>;
+}
+declare module 'sinon/lib/sinon/util/core/format.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/format'>;
+}
+declare module 'sinon/lib/sinon/util/core/function-name.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/function-name'>;
+}
+declare module 'sinon/lib/sinon/util/core/function-to-string.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/function-to-string'>;
+}
+declare module 'sinon/lib/sinon/util/core/get-config.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/get-config'>;
+}
+declare module 'sinon/lib/sinon/util/core/get-property-descriptor.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/get-property-descriptor'>;
+}
+declare module 'sinon/lib/sinon/util/core/index.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/index'>;
+}
+declare module 'sinon/lib/sinon/util/core/iterable-to-string.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/iterable-to-string'>;
+}
+declare module 'sinon/lib/sinon/util/core/log_error.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/log_error'>;
+}
+declare module 'sinon/lib/sinon/util/core/order-by-first-call.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/order-by-first-call'>;
+}
+declare module 'sinon/lib/sinon/util/core/restore.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/restore'>;
+}
+declare module 'sinon/lib/sinon/util/core/times-in-words.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/times-in-words'>;
+}
+declare module 'sinon/lib/sinon/util/core/typeOf.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/typeOf'>;
+}
+declare module 'sinon/lib/sinon/util/core/value-to-string.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/value-to-string'>;
+}
+declare module 'sinon/lib/sinon/util/core/walk.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/walk'>;
+}
+declare module 'sinon/lib/sinon/util/core/wrap-method.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/core/wrap-method'>;
+}
+declare module 'sinon/lib/sinon/util/event.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/event'>;
+}
+declare module 'sinon/lib/sinon/util/fake_server_with_clock.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/fake_server_with_clock'>;
+}
+declare module 'sinon/lib/sinon/util/fake_server.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/fake_server'>;
+}
+declare module 'sinon/lib/sinon/util/fake_timers.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/fake_timers'>;
+}
+declare module 'sinon/lib/sinon/util/fake_xml_http_request.js' {
+  declare module.exports: $Exports<'sinon/lib/sinon/util/fake_xml_http_request'>;
+}
+declare module 'sinon/pkg/sinon-2.2.0.js' {
+  declare module.exports: $Exports<'sinon/pkg/sinon-2.2.0'>;
+}
+declare module 'sinon/pkg/sinon-no-sourcemaps-2.2.0.js' {
+  declare module.exports: $Exports<'sinon/pkg/sinon-no-sourcemaps-2.2.0'>;
+}
+declare module 'sinon/pkg/sinon-no-sourcemaps.js' {
+  declare module.exports: $Exports<'sinon/pkg/sinon-no-sourcemaps'>;
+}
+declare module 'sinon/pkg/sinon.js' {
+  declare module.exports: $Exports<'sinon/pkg/sinon'>;
+}
diff --git a/flow-typed/npm/sorted-set_vx.x.x.js b/flow-typed/npm/sorted-set_vx.x.x.js
new file mode 100644
index 0000000..be9ce1e
--- /dev/null
+++ b/flow-typed/npm/sorted-set_vx.x.x.js
@@ -0,0 +1,87 @@
+// flow-typed signature: 49b561be32534814522dc2da04fa8dea
+// flow-typed version: <<STUB>>/sorted-set_v1.x.x/flow_v0.45.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'sorted-set'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'sorted-set' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'sorted-set/examples/distance' {
+  declare module.exports: any;
+}
+
+declare module 'sorted-set/examples/kademlia' {
+  declare module.exports: any;
+}
+
+declare module 'sorted-set/examples/ttl' {
+  declare module.exports: any;
+}
+
+declare module 'sorted-set/lib/intersect-sorted' {
+  declare module.exports: any;
+}
+
+declare module 'sorted-set/lib/intersect-unique' {
+  declare module.exports: any;
+}
+
+declare module 'sorted-set/lib/set' {
+  declare module.exports: any;
+}
+
+declare module 'sorted-set/test/index' {
+  declare module.exports: any;
+}
+
+declare module 'sorted-set/test/set' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'sorted-set/examples/distance.js' {
+  declare module.exports: $Exports<'sorted-set/examples/distance'>;
+}
+declare module 'sorted-set/examples/kademlia.js' {
+  declare module.exports: $Exports<'sorted-set/examples/kademlia'>;
+}
+declare module 'sorted-set/examples/ttl.js' {
+  declare module.exports: $Exports<'sorted-set/examples/ttl'>;
+}
+declare module 'sorted-set/index' {
+  declare module.exports: $Exports<'sorted-set'>;
+}
+declare module 'sorted-set/index.js' {
+  declare module.exports: $Exports<'sorted-set'>;
+}
+declare module 'sorted-set/lib/intersect-sorted.js' {
+  declare module.exports: $Exports<'sorted-set/lib/intersect-sorted'>;
+}
+declare module 'sorted-set/lib/intersect-unique.js' {
+  declare module.exports: $Exports<'sorted-set/lib/intersect-unique'>;
+}
+declare module 'sorted-set/lib/set.js' {
+  declare module.exports: $Exports<'sorted-set/lib/set'>;
+}
+declare module 'sorted-set/test/index.js' {
+  declare module.exports: $Exports<'sorted-set/test/index'>;
+}
+declare module 'sorted-set/test/set.js' {
+  declare module.exports: $Exports<'sorted-set/test/set'>;
+}
diff --git a/lib/index.js b/lib/index.js
deleted file mode 100644
index 2b229a1..0000000
--- a/lib/index.js
+++ /dev/null
@@ -1,12 +0,0 @@
-//      
-var bcoin = require('bcoin');
-
-class fullnode extends bcoin.fullnode {
-  constructor(options         ) {
-    super(options);
-  }
-}
-
-module.exports = {
-  fullnode
-}
diff --git a/package.json b/package.json
index 681643a..116b868 100644
--- a/package.json
+++ b/package.json
@@ -5,9 +5,11 @@
   "main": "lib/index.js",
   "scripts": {
     "build": "flow-remove-types -d lib/ src/",
-    "test": "npm run build && mocha",
+    "test": "npm run build && mocha -t 10000",
     "prepublish": "npm run build",
-    "typecheck": "flow check"
+    "typecheck": "flow check",
+    "lint": "./node_modules/.bin/eslint --fix src/ test/",
+    "check": "npm run lint && npm run typecheck && npm run test"
   },
   "repository": {
     "type": "git",
@@ -19,17 +21,25 @@
     "blockchain"
   ],
   "author": "Decrypto-org",
-  "license": "ISC",
+  "license": "MIT",
   "bugs": {
     "url": "https://github.com/decrypto-org/TrustIsRisk.js/issues"
   },
   "homepage": "https://github.com/decrypto-org/TrustIsRisk.js#readme",
   "devDependencies": {
+    "babel-eslint": "^7.2.3",
+    "eslint": "^3.19.0",
+    "eslint-plugin-flowtype": "^2.33.0",
     "flow-bin": "^0.45.0",
     "flow-remove-types": "^1.2.0",
-    "should": "^11.2.1"
+    "mocha": "^3.4.2",
+    "should": "^11.2.1",
+    "should-sinon": "0.0.5",
+    "sinon": "^2.2.0"
   },
   "dependencies": {
-    "bcoin": "^1.0.0-beta.12"
+    "bcoin": "1.0.0-beta.12",
+    "graph-theory-ford-fulkerson": "^1.0.0",
+    "sorted-set": "^0.3.0"
   }
 }
diff --git a/src/direct_trust.js b/src/direct_trust.js
new file mode 100644
index 0000000..3ed4fcf
--- /dev/null
+++ b/src/direct_trust.js
@@ -0,0 +1,103 @@
+// @flow
+import type {Entity, Key} from "./types";
+import type {script} from "bcoin";
+var assert = require("assert");
+var helpers = require("./helpers");
+
+type DirectTrustOptions = {
+  origin : Key,
+  dest : Key,
+  amount : number,
+
+  txHash : string,
+  outputIndex? : number,
+  script? : bcoin$Script,
+
+  prev? : DirectTrust,
+  next? : DirectTrust
+}
+
+class DirectTrust {
+  origin : Key
+  dest : Key
+  amount : number
+
+  // Every DT is associated with a transaction output, except for non-standard trust decreasing
+  // transactions, which reduce trust to zero and are related to a whole transaction and not
+  // a specific output.
+  txHash : string
+  outputIndex : (number | null)
+  script : (bcoin$Script | null)
+
+  prev : (DirectTrust | null)
+  next : (DirectTrust  | null)
+
+  constructor(options : DirectTrustOptions) {
+    this.outputIndex = null;
+    this.script = null;
+    this.prev = null;
+    this.next = null;
+    Object.assign(this, options);
+  }
+
+  isNull() {
+    return this.amount === 0;
+  }
+
+  isIncrease() : boolean {
+    return this.prev === null;
+  }
+
+  isDecrease() : boolean {
+    return !this.isIncrease();
+  }
+
+  isSpent() : boolean {
+    return this.next !== null;
+  }
+
+  isSpendable() : boolean {
+    return !this.isSpent() && !this.isNull();
+  }
+
+  isValid() : boolean {
+    // TODO: Consider removing this function and ensure validity at build time by using the flow
+    //       type system, possibly by creating sub-types like "IncreasingDirectTrust" etc.
+    if ((this.outputIndex === null) !== (this.script === null)) return false;
+    if (this.outputIndex === null && this.isIncrease()) return false;
+    if (this.outputIndex === null && this.amount > 0) return false; 
+    if (this.isIncrease() && this.isNull()) return false;
+    if (this.isSpent() && this.isNull()) return false;
+    return true;
+  }
+
+  getOriginEntity() : Entity {
+    return helpers.pubKeyToEntity(this.origin);
+  }
+
+  getDestEntity() : Entity {
+    return helpers.pubKeyToEntity(this.dest);
+  }
+
+  spend(next : DirectTrust) : void {
+    assert(!this.isSpent());
+    assert(this.origin.equals(next.origin) && this.dest.equals(next.dest));
+    assert(next.amount <= this.amount);
+
+    this.next = next;
+    next.prev = this;
+  }
+
+  getNullifying(txHash : string) : DirectTrust {
+    return new DirectTrust({
+      origin: this.origin,
+      dest: this.dest,
+      amount: 0,
+
+      prev: this,
+      txHash,
+    });
+  }
+}
+
+module.exports = DirectTrust;
diff --git a/src/full_node.js b/src/full_node.js
new file mode 100644
index 0000000..93e664d
--- /dev/null
+++ b/src/full_node.js
@@ -0,0 +1,14 @@
+// @flow
+var bcoin = require("bcoin");
+var TrustIsRisk = require("./trust_is_risk");
+
+class FullNode extends bcoin.fullnode {
+  trust : TrustIsRisk
+
+  constructor(options : Object) {
+    super(options);
+    this.trust = new TrustIsRisk(this);
+  }
+}
+
+module.exports = FullNode;
diff --git a/src/helpers.js b/src/helpers.js
new file mode 100644
index 0000000..6416a31
--- /dev/null
+++ b/src/helpers.js
@@ -0,0 +1,12 @@
+// @flow
+import type {Entity, TXHash, Key} from "./types";
+var bcoin = require("bcoin");
+var Address = bcoin.primitives.Address;
+
+var helpers = {
+  pubKeyToEntity: (key : Key) : Entity => {
+    return Address.fromHash(bcoin.crypto.hash160(key)).toBase58();
+  }
+};
+
+module.exports = helpers;
diff --git a/src/index.js b/src/index.js
index 2db0e64..66a1290 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,12 +1,5 @@
 // @flow
-var bcoin = require('bcoin');
-
-class fullnode extends bcoin.fullnode {
-  constructor(options : Object) {
-    super(options);
-  }
-}
-
 module.exports = {
-  fullnode
-}
+  FullNode: require("./full_node"),
+  TrustIsRisk: require("./trust_is_risk")
+};
diff --git a/src/trust_db.js b/src/trust_db.js
new file mode 100644
index 0000000..d41e680
--- /dev/null
+++ b/src/trust_db.js
@@ -0,0 +1,115 @@
+// @flow
+import type {Entity, TXHash, Key} from "./types";
+var assert = require("assert");
+var SortedSet = require("sorted-set");
+var maxFlow = require("graph-theory-ford-fulkerson");
+var bcoin = require("bcoin");
+var Address = bcoin.primitives.Address;
+var KeyRing = bcoin.primitives.KeyRing;
+var MTX = bcoin.primitives.MTX;
+var Input = bcoin.primitives.Input;
+var Output = bcoin.primitives.Output;
+var Outpoint = bcoin.primitives.Outpoint;
+var DirectTrust = require("./direct_trust");
+
+class TrustDB {
+  directTrusts : Map<Entity, Map<Entity, Array<DirectTrust>>>
+  txToDirectTrust : Map<string, DirectTrust>
+  entities : SortedSet;
+
+  constructor() {
+    this.directTrusts = new Map();
+    this.txToDirectTrust = new Map();
+    this.entities = new SortedSet();
+  }
+
+  getDirectTrustByOutpoint(outpoint : bcoin$Outpoint) : (DirectTrust | null) {
+    var trust = this.txToDirectTrust.get(outpoint.hash.toString("hex"));
+    if (!trust) return null;
+    if (trust.outputIndex !== outpoint.index) return null;
+    return trust;
+  }
+
+  getDirectTrustAmount(origin : Entity, dest : Entity) : number {
+    if (origin === dest) return Infinity;
+
+    var trusts = this.getSpendableDirectTrusts(origin, dest);
+    return trusts.reduce((sum, t) => sum + t.amount, 0);
+  }
+
+  getSpendableDirectTrusts(origin : Entity, dest : Entity) : DirectTrust[] {
+    return this.getDirectTrusts(origin, dest).filter((t) => t.isSpendable());
+  }
+
+  getDirectTrusts(origin : Entity, dest : Entity) : DirectTrust[] {
+    var originMap = this.directTrusts.get(origin);
+    if (!originMap) return [];
+
+    var trusts = originMap.get(dest);
+    if (!trusts) return [];
+
+    return trusts;
+  }
+
+  getGraphWeightMatrix() : number[][] {
+    var entitiesArr = this.getEntities();
+    return entitiesArr.map((origin) => {
+      return entitiesArr.map((dest) => this.getDirectTrustAmount(origin, dest));
+    });
+  }
+
+  getTrustAmount(origin : Entity, dest : Entity) : number {
+    // TODO: Optimize
+    if (origin === dest) return Infinity;
+
+    var graph = this.getGraphWeightMatrix();
+    var originIndex = this.getEntityIndex(origin);
+    var destIndex = this.getEntityIndex(dest);
+
+    if (originIndex === -1 || destIndex === -1) return 0;
+    else return maxFlow(graph, originIndex, destIndex);
+  }
+
+  getEntities() : Entity[] {
+    return this.entities.slice();
+  }
+
+  getEntityIndex(entity : Entity) : number {
+    return this.entities.rank(entity);
+  }
+
+  isTrustTX(txHash : string) : boolean {
+    return this.txToDirectTrust.has(txHash);
+  }
+
+  isTrustOutput(txHash : string, outputIndex : number) : boolean {
+    var trust = this.txToDirectTrust.get(txHash);
+    return trust !== undefined && trust.outputIndex === outputIndex;
+  }
+
+  add(trust : DirectTrust) {
+    var origin = trust.getOriginEntity();
+    var dest = trust.getDestEntity();
+    assert(origin !== dest);
+
+    if (!this.directTrusts.has(origin)) this.directTrusts.set(origin, new Map());
+    var originMap = ((this.directTrusts.get(origin) : any) : Map<string, Array<DirectTrust>>);
+
+    if (!originMap.has(dest)) originMap.set(dest, []);
+    var trusts = ((originMap.get(dest) : any) : Array<DirectTrust>);
+
+    if (trust.prev !== null) {
+      trust.prev.spend(trust);
+      assert(trust.prev && trust.prev.isValid() && !trust.prev.isSpendable());
+    }
+
+    assert(trust.isValid());
+    trusts.push(trust);
+    this.txToDirectTrust.set(trust.txHash, trust);
+
+    this.entities.add(origin);
+    this.entities.add(dest);
+  }
+}
+
+module.exports = TrustDB;
diff --git a/src/trust_is_risk.js b/src/trust_is_risk.js
new file mode 100644
index 0000000..d92a947
--- /dev/null
+++ b/src/trust_is_risk.js
@@ -0,0 +1,283 @@
+// @flow
+import type {Entity, TXHash, Key} from "./types";
+var bcoin = require("bcoin");
+var Address = bcoin.primitives.Address;
+var KeyRing = bcoin.primitives.KeyRing;
+var MTX = bcoin.primitives.MTX;
+var Input = bcoin.primitives.Input;
+var Output = bcoin.primitives.Output;
+var Outpoint = bcoin.primitives.Outpoint;
+var Coin = bcoin.primitives.Coin;
+var assert = require("assert");
+var helpers = require("./helpers");
+var TrustDB = require("./trust_db");
+var DirectTrust = require("./direct_trust");
+
+class TrustIsRisk {
+  node : bcoin$FullNode
+  db : TrustDB
+
+  constructor(node : bcoin$FullNode) {
+    this.node = node;
+    this.db = new TrustDB();
+
+    this.node.on("tx", this.addTX.bind(this));
+  }
+
+  getIndirectTrust(origin : Entity, dest : Entity) {
+    return this.db.getTrustAmount(origin, dest);
+  }
+
+  getDirectTrust(origin : Entity, dest : Entity) {
+    return this.db.getDirectTrustAmount(origin, dest);
+  }
+
+  // Attempts to parse a bitcoin transaction as a trust change and adds it to the trust network
+  // if successful.
+  // Returns true if the transaction is a TIR transaction and was successfully added to the
+  // network, false otherwise.
+  // Throws an error if the transaction was processed earlier.
+  addTX(tx : bcoin$TX) : boolean {
+    var txHash = tx.hash().toString("hex");
+    if (this.db.isTrustTX(txHash)) {
+      throw new Error(`Transaction already processed: Transaction ${txHash} already carries trust`);
+    }
+
+    var directTrusts = this.getDirectTrusts(tx);
+    if (directTrusts.length === 0) return false;
+    else {
+      directTrusts.forEach(this.db.add.bind(this.db));
+      return true;
+    }
+  }
+
+  // Returns a list of trusts that a transaction contains, which will be one of the following:
+  //   * An empty list (for non-TIR transactions).
+  //   * A list containing a single trust increase (for trust-increasing transactions).
+  //   * A list containing one or more trust decreases (for trust-decreasing transactions).
+  getDirectTrusts(tx : bcoin$TX) : DirectTrust[] {
+    var trustIncrease = this.parseTXAsTrustIncrease(tx);
+    if (trustIncrease !== null) {
+      return [trustIncrease];
+    } else {
+      return this.getTrustDecreases(tx);
+    }
+  }
+
+  // Returns a promise resolving to a mutable transaction object, which increases a trust
+  // relationship by some amount. It will spend the outpoint, which must reference a P2PKH output
+  // payable to the sender. The origin key must be a private key. Any satoshis not spent will be
+  // returned to the sender, minus the fees, via P2PKH.
+  async createTrustIncreasingMTX(origin : Key, dest : Key, outpoint : bcoin$Outpoint,
+      trustAmount : number, fee : ?number)
+      : Promise<bcoin$MTX> {
+    if (!fee) fee = 1000; // TODO: estimate this
+    var coin = await this.node.getCoin(outpoint.hash, outpoint.index);
+    if (!coin) throw new Error("Could not find coin");
+    if (origin === dest) throw new Error("Can not increase self-trust.");
+
+    var originKeyRing = KeyRing.fromPrivate(origin);
+    var originPubKey = originKeyRing.getPublicKey();
+
+    var mtx = new MTX({
+      outputs: [
+        new Output({
+          script: bcoin.script.fromMultisig(1, 2, [originPubKey, dest]),
+          value: trustAmount
+        })
+      ]
+    });
+
+    var changeAmount = coin.value - trustAmount - fee;
+    assert(changeAmount >= 0);
+    if (changeAmount) {
+      mtx.addOutput(new Output({
+        script: bcoin.script.fromPubkeyhash(bcoin.crypto.hash160(originPubKey)),
+        value: changeAmount
+      }));
+    }
+
+    mtx.addCoin(coin);
+    var success = mtx.scriptVector(coin.script, mtx.inputs[0].script, originKeyRing);
+    assert(success);
+
+    var signedCount = mtx.sign(originKeyRing);
+    assert(signedCount === 1);
+
+    return mtx;
+  }
+
+  // Returns an array of trust-decreasing mutable transaction objects, which reduce a trust
+  // relationship by the amount specified. The payee will receive the amount deducted minus the
+  // transaction fees via P2PKH.
+  // If steal is undefined or set to false, then the `origin` key is expected to be a private key
+  // and the `dest` key is expected to be a public key. If steal is set to true, then `origin` is
+  // expected to be a public key and `dest` is expected to be a private key. The private key will be
+  // used to sign the transaction.
+  createTrustDecreasingMTXs(origin : Key, dest : Key, trustDecreaseAmount : number, payee : ?Entity,
+      steal : ?boolean, fee : ?number) : bcoin$MTX[] {
+    if (steal === undefined) steal = false;
+
+    var signingKeyRing, originKeyRing, destKeyRing;
+    if (!steal) {
+      signingKeyRing = KeyRing.fromPrivate(origin);
+      originKeyRing = KeyRing.fromPrivate(origin);
+      destKeyRing = KeyRing.fromPublic(dest);
+    } else {
+      signingKeyRing = KeyRing.fromPrivate(dest);
+      originKeyRing = KeyRing.fromPublic(origin);
+      destKeyRing = KeyRing.fromPrivate(dest);
+    }
+
+    var originAddress = helpers.pubKeyToEntity(originKeyRing.getPublicKey());
+    var destAddress = helpers.pubKeyToEntity(destKeyRing.getPublicKey());
+
+    if (originAddress === destAddress) throw new Error("Can't decrease self-trust");
+
+    var existingTrustAmount = this.db.getDirectTrustAmount(originAddress, destAddress);
+    if (existingTrustAmount < trustDecreaseAmount) throw new Error("Insufficient trust");
+    
+    var directTrusts = this.db.getSpendableDirectTrusts(originAddress, destAddress);
+    return directTrusts.map((directTrust) => {
+      var decrease = Math.min(trustDecreaseAmount, directTrust.amount);
+      if (decrease === 0) return null;
+      trustDecreaseAmount -= decrease;
+      return this.getTrustDecreasingMTX(directTrust, decrease, payee, signingKeyRing, fee);
+    }).filter(Boolean);
+  }
+
+  getTrustDecreasingMTX(directTrust : DirectTrust, decreaseAmount : number, payee : ?Entity,
+      signingKeyRing : bcoin$KeyRing, fee : ?number) {
+    if (!payee) payee = directTrust.getOriginEntity();
+    if (!fee) fee = 1000; // TODO: estimate this
+
+    var mtx = new MTX({
+      inputs: [
+        Input.fromOutpoint(new Outpoint(directTrust.txHash, directTrust.outputIndex))
+      ],
+      outputs: [new Output({
+        script: bcoin.script.fromPubkeyhash(Address.fromBase58(payee).hash),
+        value: ((decreaseAmount - fee) < 0) ? 0 : (decreaseAmount - fee)
+      })]
+    });
+
+    var remainingTrustAmount = directTrust.amount - decreaseAmount;
+    if (remainingTrustAmount > 0) {
+      mtx.addOutput(new Output({
+        script: bcoin.script.fromMultisig(1, 2, [directTrust.origin, directTrust.dest]),
+        value: remainingTrustAmount
+      }));
+    }
+
+    var success = mtx.scriptVector(((directTrust.script : any) : bcoin$Script),
+        mtx.inputs[0].script, KeyRing.fromPublic(directTrust.origin));
+    assert(success);
+
+    success = mtx.signInput(0, new Coin({script: directTrust.script, value: directTrust.amount}),
+        signingKeyRing);
+    assert(success);
+
+    return mtx;
+  }
+
+  parseTXAsTrustIncrease(tx : bcoin$TX) : (DirectTrust | null) {
+    if (tx.inputs.length !== 1) return null;
+    var input = tx.inputs[0];
+    if (input.getType() !== "pubkeyhash") return null; // TODO: This is unreliable
+    if (this.db.isTrustOutput(input.prevout.hash.toString("hex"), input.prevout.index)) return null;
+    var origin = tx.inputs[0].getAddress().toBase58();
+
+    if (tx.outputs.length === 0 || tx.outputs.length > 2) return null;
+
+    var trustOutputs = this.searchForDirectTrustOutputs(tx, origin);
+    if (trustOutputs.length !== 1) return null;
+
+    var changeOutputCount = tx.outputs.filter((o) => this.isChangeOutput(o, origin)).length;
+    if (changeOutputCount + 1 !== tx.outputs.length) return null;
+
+    return trustOutputs[0];
+  }
+
+  getTrustDecreases(tx : bcoin$TX) : DirectTrust[] {
+    var inputTrusts = this.getInputTrusts(tx.inputs);
+    return inputTrusts.map(this.getTrustDecrease.bind(this, tx));
+  }
+
+  getInputTrusts(inputs : bcoin$Input[]) : DirectTrust[] {
+    return inputs.map((input) => {
+      return this.db.getDirectTrustByOutpoint(input.prevout);
+    }).filter(Boolean);
+  }
+
+  getTrustDecrease(tx : bcoin$TX, prevTrust : DirectTrust) : DirectTrust {
+    var txHash = tx.hash().toString("hex");
+    var nullTrust = prevTrust.getNullifying(txHash);
+
+    if (tx.inputs.length !== 1) return nullTrust;
+
+    var trustOutputs = this.searchForDirectTrustOutputs(tx, prevTrust.getOriginEntity(),
+        prevTrust.getDestEntity());
+    if (trustOutputs.length != 1) return nullTrust;
+    var nextTrust = trustOutputs[0];
+
+    nextTrust.prev = prevTrust;
+
+    assert(nextTrust.amount <= prevTrust.amount);
+    return nextTrust;
+  }
+  
+  // Looks for direct trust outputs that originate from a sender in a transaction.
+  // Returns an array of the corresponding DirectTrust objects.
+  // If the recipient parameter is set, it will limit the results only to the outputs being sent to
+  // the recipient.
+  searchForDirectTrustOutputs(tx : bcoin$TX, origin : Entity, recipient : ?Entity) : DirectTrust[] {
+    var directTrusts = tx.outputs.map((output, outputIndex) =>
+      this.parseOutputAsDirectTrust(tx, outputIndex, origin)
+    ).filter(Boolean); // filter out nulls
+
+    if (recipient) {
+      directTrusts = directTrusts.filter((trust) =>
+          helpers.pubKeyToEntity(trust.dest) === recipient);
+    }
+    
+    return directTrusts;
+  }
+
+  isChangeOutput(output : bcoin$Output, origin : Entity) : boolean {
+    return (output.getType() === "pubkeyhash")
+            && (output.getAddress().toBase58() === origin);
+  }
+
+  parseOutputAsDirectTrust(tx : bcoin$TX, outputIndex : number, origin : Entity)
+      : (DirectTrust | null) {
+    var txHash = tx.hash().toString("hex");
+    var output = tx.outputs[outputIndex];
+    if (output.getType() !== "multisig") return null;
+
+    var entities = [1, 2].map((i) => helpers.pubKeyToEntity(output.script.get(i)));
+    if (entities[0] === entities[1]) return null;
+
+    var originPubKey, destPubKey;
+    if (entities[0] === origin) {
+      originPubKey = output.script.get(1);
+      destPubKey = output.script.get(2);
+    }
+    else if (entities[1] === origin) {
+      originPubKey = output.script.get(2);
+      destPubKey = output.script.get(1);
+    }
+    else return null; 
+
+    return new DirectTrust({
+      origin: originPubKey,
+      dest: destPubKey,
+      amount: Number(output.value),
+
+      txHash,
+      outputIndex,
+      script: output.script
+    });
+  }
+}
+
+module.exports = TrustIsRisk;
diff --git a/src/types.js b/src/types.js
new file mode 100644
index 0000000..1bb788b
--- /dev/null
+++ b/src/types.js
@@ -0,0 +1,8 @@
+//@flow
+
+// base58 bitcoin address: 
+export type Entity = string;
+
+export type TXHash = string;
+
+export type Key = Buffer;
diff --git a/test/fixtures.js b/test/fixtures.js
new file mode 100644
index 0000000..a11f021
--- /dev/null
+++ b/test/fixtures.js
@@ -0,0 +1,23 @@
+var bcoin = require("bcoin");
+var KeyRing = bcoin.primitives.KeyRing;
+
+var privateKeys = {
+  "alice": "02B8F07A401ECA4888039B1898F94DB44C43CCC6D3AA8B27E9B6ED7B377B24C0",
+  "bob": "2437025954568A8273968AA7535DBFC444FD8F8D0F5237CD96AC7234C77810AD",
+  "charlie": "3BBA2AF9539D09B4FD2BDEA1D3A2CE4BF5D779831B8781EE2ACF9C03378B2AD7",
+  "dave": "19BD8D853FAEFDB9B01E4DE7F6096FF8F5F96D43E6564A5258307334A4AA59F3",
+  "eve": "0503054CF7EBB4E62191AF1D8DE97945178D3F465EE88EF1FB4E80A70CB4A49A",
+  "frank": "878DFE5B43AC858EA37B3A9EEBA9E244F1848A30F78B2E5AC5B3EBDE81AC7D45",
+  "george": "1349A1318B1426E6F724CBFE7ECD2C46008A364A96C4BD20C83FC1C4EBB2EB4A"
+};
+
+var keyRings = {};
+for (let name in privateKeys) {
+  let key = privateKeys[name];
+  keyRings[name] = KeyRing.fromPrivate(new Buffer(key, "hex"));
+}
+
+module.exports = {
+  keyRings,
+  names: Object.keys(keyRings)
+};
diff --git a/test/full_node.js b/test/full_node.js
new file mode 100644
index 0000000..a3260ba
--- /dev/null
+++ b/test/full_node.js
@@ -0,0 +1,197 @@
+var Trust = require("../");
+var helpers = require("../lib/helpers.js");
+var bcoin = require("bcoin");
+var Script = bcoin.script;
+var Address = bcoin.primitives.Address;
+var KeyRing = bcoin.primitives.KeyRing;
+var MTX = bcoin.primitives.MTX;
+var Input = bcoin.primitives.Input;
+var Output = bcoin.primitives.Output;
+var Outpoint = bcoin.primitives.Outpoint;
+var testHelpers = require("./helpers");
+var consensus = require("bcoin/lib/protocol/consensus");
+var sinon = require("sinon");
+var should = require("should");
+var assert = require("assert");
+var fixtures = require("./fixtures");
+require("should-sinon");
+
+const COIN = consensus.COIN;
+
+describe("FullNode", () => {
+  var node = null;
+  var walletDB = null;
+  var NodeWatcher = null;
+  var watcher = null;
+  sinon.spy(Trust.TrustIsRisk.prototype, "addTX");
+
+  beforeEach("get node", async () => {
+    node = await testHelpers.getNode();
+    watcher = new testHelpers.NodeWatcher(node);
+  });
+
+  beforeEach("get walletDB", async () => {
+    walletDB = await testHelpers.getWalletDB(node);
+  });
+
+  afterEach("close walletDB", async () => walletDB.close());
+  afterEach("close node", async () => node.close());
+
+  it("should call trust.addTX() on every transaction", async function() {
+    var sender = await testHelpers.createWallet(walletDB, "sender");
+    var receiver = await testHelpers.createWallet(walletDB, "receiver");
+
+    await testHelpers.delay(1000);
+    // Produce a block and reward the sender, so that we have a coin to spend.
+    await testHelpers.mineBlock(node, sender.getAddress("base58"));
+
+    // Make the coin spendable.
+    consensus.COINBASE_MATURITY = 0;
+    await testHelpers.delay(100);
+
+    await sender.send({
+      outputs: [{
+        value: 10 * COIN,
+        address: receiver.getAddress("base58")
+      }]
+    });
+    await watcher.waitForTX();
+    
+    node.trust.addTX.should.be.calledOnce();
+  });
+
+  describe("with the nobodyLikesFrank.json example", () => {
+    var addresses, rings = {};
+
+    beforeEach("apply graph transactions", async () => {
+      addresses = {};
+
+      for (var [name, keyRing] of Object.entries(fixtures.keyRings)) {
+        addresses[name] = helpers.pubKeyToEntity(keyRing.getPublicKey());
+      }
+
+      // Alice mines three blocks, each rewards her with 50 spendable BTC
+      consensus.COINBASE_MATURITY = 0;
+      var blockCount = 3;
+      var coinbaseHashes = [];
+      for(let i = 0; i < blockCount; i++) {
+        var block = await testHelpers.mineBlock(node, addresses.alice);
+        coinbaseHashes.push(block.txs[0].hash());
+        await testHelpers.delay(500);
+      }
+
+      // Alice sends 20 BTC to everyone (including herself) via P2PKH
+      var sendAmount = 20;
+      var outputs = fixtures.names.map((name) => {
+        return testHelpers.getP2PKHOutput(
+            Address.fromHash(bcoin.crypto.hash160(fixtures.keyRings[name].getPublicKey()))
+                .toBase58(),
+            sendAmount * consensus.COIN);
+      });
+
+      // We have to use a change output, because transaction with too large a fee are considered
+      // invalid.
+      var fee = 0.01;
+      var changeAmount = 50 * blockCount - sendAmount * fixtures.names.length - fee;
+      if (changeAmount >= 0.01) {
+        outputs.push(new Output({
+          script: Script.fromPubkeyhash(bcoin.crypto.hash160(
+              fixtures.keyRings.alice.getPublicKey())),
+          value: changeAmount * consensus.COIN
+        }));
+      }
+
+      // Use the coinbase coins as inputs
+      var coinbaseCoins = await Promise.all(coinbaseHashes.map((hash) => {
+        return node.getCoin(hash.toString("hex"), 0);
+      }));
+      var mtx = new MTX({outputs});
+      coinbaseCoins.forEach((coin) => mtx.addCoin(coin));
+
+      var signedCount = mtx.sign(fixtures.keyRings.alice);
+      assert(signedCount === blockCount);
+      assert(await mtx.verify());
+      
+      var tx = mtx.toTX();
+      node.sendTX(tx);
+      await watcher.waitForTX();
+
+      prevout = {};
+      fixtures.names.forEach((name) => {
+        prevout[name] = {
+          hash: tx.hash().toString("hex"),
+          index: fixtures.names.indexOf(name)
+        };
+      });
+      
+      // Alice mines another block
+      await testHelpers.mineBlock(node, helpers.pubKeyToEntity(
+          fixtures.keyRings.alice.getPublicKey()));
+      await testHelpers.delay(500);
+
+      var graph = require("./graphs/nobodyLikesFrank.json");
+      for (var origin in graph) {
+        var neighbours = graph[origin];
+        for (var dest in neighbours) {
+          var value = neighbours[dest];
+          if (!value || value < 1) continue;
+
+          let outpoint = new Outpoint(prevout[origin].hash, prevout[origin].index);
+					
+          let mtx = await node.trust.createTrustIncreasingMTX(
+              fixtures.keyRings[origin].getPrivateKey(),
+              fixtures.keyRings[dest].getPublicKey(),
+              outpoint,
+              value * consensus.COIN);
+					
+          assert(await mtx.verify());
+
+          let tx = mtx.toTX();
+          node.sendTX(tx);
+          await watcher.waitForTX();
+					
+          prevout[origin] = {hash: tx.hash().toString("hex"), index: 1};
+        }
+      }
+      
+      // Alice mines yet another block
+      await testHelpers.mineBlock(node, helpers.pubKeyToEntity(
+          fixtures.keyRings.alice.getPublicKey()));
+      await testHelpers.delay(500);
+    });
+
+    it("computes trusts correctly", () => {
+      for (name in addresses) { // Add addresses to scope
+        eval(`var ${name} = "${addresses[name]}";`);
+      }	
+
+      should(node.trust.getIndirectTrust(alice, alice)).equal(Infinity);
+      should(node.trust.getIndirectTrust(alice, bob)).equal(10 * COIN);
+      should(node.trust.getIndirectTrust(alice, charlie)).equal(1 * COIN);
+      should(node.trust.getIndirectTrust(alice, frank)).equal(0);
+      should(node.trust.getIndirectTrust(alice, eve)).equal(6 * COIN);
+
+      should(node.trust.getIndirectTrust(bob, alice)).equal(1 * COIN);
+      should(node.trust.getIndirectTrust(bob, eve)).equal(3 * COIN);
+      should(node.trust.getIndirectTrust(dave, eve)).equal(12 * COIN);
+      should(node.trust.getIndirectTrust(george, eve)).equal(0);
+    });
+
+    it("after decreasing some trusts computes trusts correctly", async () => {
+      var mtxs = node.trust.createTrustDecreasingMTXs(fixtures.keyRings.alice.getPrivateKey(),
+          fixtures.keyRings.bob.getPublicKey(), 3 * COIN);
+      mtxs.length.should.equal(1);
+      var mtx = mtxs[0];
+
+      should(await mtx.verify());
+      node.sendTX(mtx.toTX());
+
+      await testHelpers.delay(750);
+      should(node.trust.getIndirectTrust(addresses.alice, addresses.bob)).equal(7 * COIN);
+    });
+  });
+
+  describe("with the topcoder.json example", () => {
+    //TODO: Write tests here.
+  });
+});
diff --git a/test/graphs/nobodyLikesFrank.json b/test/graphs/nobodyLikesFrank.json
new file mode 100644
index 0000000..9c246bc
--- /dev/null
+++ b/test/graphs/nobodyLikesFrank.json
@@ -0,0 +1,24 @@
+{
+  "alice": {
+    "bob": 10,
+    "dave": 3
+  },
+  "bob": {
+    "charlie": 1,
+    "eve": 2,
+    "dave": 1,
+    "george": 1
+  },
+  "charlie": {
+    "george": 3
+  },
+  "dave": {
+    "eve": 10,
+    "alice": 2
+  },
+  "eve": {},
+  "frank": {
+    "charlie": 10
+  },
+  "george": {}
+}
diff --git a/test/graphs/topcoder.json b/test/graphs/topcoder.json
new file mode 100644
index 0000000..f051965
--- /dev/null
+++ b/test/graphs/topcoder.json
@@ -0,0 +1,19 @@
+{
+  "alice": {
+    "bob": 3,
+    "dave": 1
+  },
+  "bob": {
+    "charlie": 3
+  },
+  "charlie": {
+    "frank": 2
+  },
+  "dave": {
+    "charlie": 5,
+    "eve": 4
+  },
+  "eve": {
+    "frank": 2
+  }
+}
diff --git a/test/helpers.js b/test/helpers.js
new file mode 100644
index 0000000..855c1de
--- /dev/null
+++ b/test/helpers.js
@@ -0,0 +1,160 @@
+var TrustIsRisk = require("../");
+var WalletDB = require("bcoin/lib/wallet/walletdb");
+var bcoin = require("bcoin");
+var fixtures = require("./fixtures");
+var KeyRing = bcoin.primitives.KeyRing;
+var assert = require("assert");
+
+var testHelpers = {
+  getNode: async () => {
+    var node = new TrustIsRisk.FullNode({network: "regtest", passphrase: "secret"});
+
+    await node.open();
+    await node.connect();
+    node.startSync();
+
+    return node;
+  },
+
+  getWalletDB: async (node) => {
+    var walletDB = new WalletDB({
+      network: "regtest",
+      db: "memory",
+      client: new bcoin.node.NodeClient(node)
+    });
+
+    await walletDB.open();
+    await walletDB.connect();
+
+    return walletDB;
+  },
+
+  createWallet: async (walletDB, id) => {
+    var options = {
+      id,
+      passphrase: "secret",
+      witness: false,
+      type: "pubkeyhash"
+    };
+
+    return walletDB.create(options); 
+  },
+
+  mineBlock: async (node, rewardAddress) => {
+    var block = await node.miner.mineBlock(node.chain.tip, rewardAddress);
+    await node.chain.add(block);
+    // node.chain.tip does not contain all the properties we want,
+    // so we need to fetch it:
+    return node.getBlock(node.chain.tip.hash);
+  },
+
+  delay: async (milliseconds) => {
+    return new Promise((resolve, reject) => {
+      setTimeout(resolve, milliseconds);
+    });
+  },
+
+  bufferToScript: (data) => {
+    return `0x${Number(data.length).toString(16)} 0x${data.toString("hex")}`;
+  },
+
+  getP2PKHOutput: (dest, value) => {
+    var address = bcoin.primitives.Address.fromBase58(dest);
+    var script = bcoin.script.fromPubkeyhash(address.hash);
+    
+    return new bcoin.primitives.Output({script, value});
+  },
+
+  getP2PKHInput: (pubKey, prevout) => {
+    if (!prevout) {
+      prevout = { // Don't care
+        hash: "v0pnhphaf4r5wz63j60vnh27s1bftl260qq621y458tn0g4x64u64yqz6d7qi6i8",
+        index: 2
+      };
+    }
+
+    return new bcoin.primitives.Input({
+      prevout,
+      script: bcoin.script.fromString(
+          // Don't care about the signature
+          "0x47 0x3044022035e32834c6ee4db1696cc06762feca2809d865ca12a3b98c801f3f451341a2570220573bf3ffef55f2651e1563acc0a22f8056222f277f5ddf17dd583d4edd40fa6001 "
+          + testHelpers.bufferToScript(pubKey))
+    }); 
+  },
+
+  getOneOfTwoMultisigOutput: (originPubKey, destPubKey, value) => {
+    return new bcoin.primitives.Output({
+      script: bcoin.script.fromMultisig(1, 2, [originPubKey, destPubKey]),
+      value
+    });
+  },
+
+  getTrustIncreasingMTX: (originPubKey, destPubKey, value) => {
+    return new bcoin.primitives.MTX({
+      inputs: [
+        testHelpers.getP2PKHInput(originPubKey)
+      ],
+      outputs: [
+        testHelpers.getOneOfTwoMultisigOutput(originPubKey, destPubKey, value)
+      ]
+    });
+  },
+
+  applyGraph: (trust, fileName, addressBook) => {
+    var graph = require(fileName);
+
+    for (var origin in graph) {
+      var neighbours = graph[origin];
+      for (var dest in neighbours) {
+        var value = neighbours[dest];
+        trust.addTX(testHelpers.getTrustIncreasingMTX(addressBook[origin].pubKey, addressBook[dest].pubKey, value).toTX()); 
+      }
+    }
+  }
+};
+
+class NodeWatcher {
+  constructor(node) {
+    this.txCount = 0;
+    this.blockCount = 0;
+    this.node = node;
+    this.node.on("tx", this.onTX.bind(this));
+    this.node.on("block", this.onBlock.bind(this));
+  }
+
+  onTX() {
+    this.txCount++;
+  }
+
+  onBlock() {
+    this.blockCount++;
+  }
+
+  async waitForBlock(initialCount) {
+    if (initialCount === undefined) initialCount = this.blockCount;
+    await new Promise((resolve, reject) => {
+      var check = (() => {
+        if (this.blockCount > initialCount) resolve();
+        else setTimeout(check, 100);
+      }).bind(this);
+
+      check();
+    });
+  }
+
+  async waitForTX(initialCount) {
+    if (initialCount === undefined) initialCount = this.txCount;
+    await new Promise((resolve, reject) => {
+      var check = (() => {
+        if (this.txCount > initialCount) resolve();
+        else setTimeout(check, 100);
+      }).bind(this);
+
+      check();
+    });
+  }
+}
+
+testHelpers.NodeWatcher = NodeWatcher;
+
+module.exports = testHelpers;
diff --git a/test/test.js b/test/test.js
deleted file mode 100644
index cd34a7d..0000000
--- a/test/test.js
+++ /dev/null
@@ -1,10 +0,0 @@
-var TrustIsRisk = require('../');
-var bcoin = require('bcoin');
-var should = require('should');
-
-describe('new TrustIsRisk.fullnode', () => {
-  it('should be a bcoin instance', () => {
-    var node = new TrustIsRisk.fullnode({});
-    should(node).be.an.instanceof(bcoin.fullnode);
-  });
-});
diff --git a/test/trust_is_risk.js b/test/trust_is_risk.js
new file mode 100644
index 0000000..2040784
--- /dev/null
+++ b/test/trust_is_risk.js
@@ -0,0 +1,383 @@
+var Trust = require("../");
+var helpers = require("../lib/helpers.js");
+var bcoin = require("bcoin");
+var Coin = bcoin.primitives.Coin;
+var Address = bcoin.primitives.Address;
+var Input = bcoin.primitives.Input;
+var MTX = bcoin.primitives.MTX;
+var testHelpers = require("./helpers");
+var consensus = require("bcoin/lib/protocol/consensus");
+var sinon = require("sinon");
+var should = require("should");
+var fixtures = require("./fixtures");
+require("should-sinon");
+
+const COIN = bcoin.consensus.COIN;
+
+describe("TrustIsRisk", () => {
+  var addr = {};
+  for (let [name, keyRing] of Object.entries(fixtures.keyRings)) {
+    var pubKey = keyRing.getPublicKey();
+    var privKey = keyRing.getPrivateKey();
+
+    addr[name] = {};
+    addr[name].pubKey = pubKey;
+    addr[name].privKey = privKey;
+    addr[name].base58 = bcoin.primitives.Address.fromHash(bcoin.crypto.hash160(pubKey)).toString();
+  }
+
+  // Add base58 address variables to scope.
+  for (name in fixtures.keyRings) {
+    var keyRing = fixtures.keyRings[name];
+    eval(`var ${name} = "${bcoin.primitives.Address.fromHash(bcoin.crypto.hash160(keyRing.getPublicKey())).toString()}";`);
+  }
+
+  var node, tir, trustIncreasingMTX, trustDecreasingMTX, trustIncreasingTX;
+  beforeEach(() => {
+    node = new bcoin.fullnode({});
+    tir = new Trust.TrustIsRisk(node);
+
+    trustIncreasingMTX = testHelpers.getTrustIncreasingMTX(addr.alice.pubKey, addr.bob.pubKey, 42 * COIN);
+    trustIncreasingTX = trustIncreasingMTX.toTX();
+
+    var inputOneOfTwoMultisig = new Input({
+      prevout: {
+        hash: trustIncreasingTX.hash().toString("hex"),
+        index: 0
+      },
+      script: bcoin.script.fromString(
+        // 17P8kCbDBPmqLDCCe9dYwbfiEDaRb5xDYE
+        "0x47 0x3044022035e32834c6ee4db1696cc06762feca2809d865ca12a3b98c801f3f451341a2570220573bf3ffef55f2651e1563acc0a22f8056222f277f5ddf17dd583d4edd40fa6001 0x21 0x02b8f07a401eca4888039b1898f94db44c43ccc6d3aa8b27e9b6ed7b377b24c083")
+    });
+
+    trustDecreasingMTX = new MTX({
+      inputs: [
+        inputOneOfTwoMultisig
+      ],
+      outputs: [
+        testHelpers.getOneOfTwoMultisigOutput(addr.alice.pubKey, addr.bob.pubKey, 20 * COIN),
+        testHelpers.getP2PKHOutput(addr.alice.base58, 22 * COIN)
+      ]
+    });
+  });
+
+  describe(".getDirectTrust()", () => {
+    it("returns zero for two arbitary parties that do not trust each other", () => {
+      tir.getDirectTrust(alice, bob).should.equal(0);
+      tir.getDirectTrust(bob, alice).should.equal(0);
+      tir.getDirectTrust(charlie, alice).should.equal(0);
+      tir.getDirectTrust(alice, charlie).should.equal(0);
+      tir.getDirectTrust(charlie, frank).should.equal(0);
+    });
+
+    it("returns Infinity for one's direct trust to themselves", () => {
+      tir.getDirectTrust(alice, alice).should.equal(Infinity);
+      tir.getDirectTrust(bob, bob).should.equal(Infinity);
+    });
+  });
+
+  describe(".addTX()", () => {
+    describe("with a non-TIR transaction", () => {
+      it("does not change trust", () => {
+        trustIncreasingMTX.outputs[0] = testHelpers.getP2PKHOutput(charlie, 50 * COIN); 
+        tir.addTX(trustIncreasingMTX.toTX());
+
+        tir.getDirectTrust(alice, bob).should.equal(0);
+        tir.getDirectTrust(bob, alice).should.equal(0);
+        tir.getDirectTrust(alice, charlie).should.equal(0);
+        tir.getDirectTrust(charlie, alice).should.equal(0);
+        tir.getDirectTrust(charlie, dave).should.equal(0);
+      });
+    });
+
+    describe("with a trust increasing transaction", () => {
+      it("correctly increases trust", () => {
+        tir.addTX(trustIncreasingTX);
+
+        tir.getDirectTrust(alice, bob).should.equal(42 * COIN);
+        tir.getDirectTrust(bob, alice).should.equal(0);
+        tir.getDirectTrust(charlie, dave).should.equal(0);
+      });
+
+      it("which has more than one input does not change trust", () => {
+        trustIncreasingMTX.inputs.push(trustIncreasingMTX.inputs[0].clone());
+        tir.addTX(trustIncreasingMTX.toTX());
+
+        tir.getDirectTrust(alice, bob).should.equal(0);
+      });
+
+      it("which has a change output correctly increases trust", () => {
+        trustIncreasingMTX.outputs[0].value -= 10 * COIN;
+        trustIncreasingMTX.outputs.push(testHelpers.getP2PKHOutput(alice, 10 * COIN));
+        tir.addTX(trustIncreasingMTX.toTX());
+
+        tir.getDirectTrust(alice, bob).should.equal(32 * COIN);
+      });
+
+      it("which has two change outputs does not change trust", () => {
+        trustIncreasingMTX.outputs[0].value -= 10;
+        for (var i = 0; i < 2; i++) {
+          trustIncreasingMTX.outputs.push(testHelpers.getP2PKHOutput(alice, 5 * COIN));
+        }
+        tir.addTX(trustIncreasingMTX.toTX());
+
+        tir.getDirectTrust(alice, bob).should.equal(0);
+      });
+
+      it("which has a second output that is not a change output does not change trust", () => {
+        trustIncreasingMTX.outputs[0].value -= 10 * COIN;
+        trustIncreasingMTX.outputs.push(testHelpers.getP2PKHOutput(charlie, 5 * COIN));
+        tir.addTX(trustIncreasingMTX.toTX());
+
+        tir.getDirectTrust(alice, bob).should.equal(0);
+      });
+
+      it("which has been processed before throws", () => {
+        var tx = trustIncreasingMTX.toTX();
+        should(tir.addTX(tx));
+        should.throws(() => tir.addTX(tx), /already processed/i);
+        tir.getDirectTrust(alice, bob).should.equal(42 * COIN);
+      });
+    });
+
+    describe("with a trust decreasing transaction", () => {
+      beforeEach(() => {
+        tir.addTX(trustIncreasingTX);
+      });
+
+      it("correctly decreases trust", () => {
+        tir.addTX(trustDecreasingMTX.toTX());
+        tir.getDirectTrust(alice, bob).should.equal(20 * COIN);
+      });
+
+      it("decreases trust to zero for trust decreasing transactions with a wrong recipient", () => {
+        // By changing the trust recipient from bob to charlie, we make the transaction a
+        // nullifying trust transaction.
+        trustDecreasingMTX.outputs[0] =
+            testHelpers.getOneOfTwoMultisigOutput(addr.alice.pubKey, addr.charlie.pubKey, 20 * COIN);
+
+        tir.addTX(trustDecreasingMTX.toTX());
+        tir.getDirectTrust(alice, bob).should.equal(0);
+      });
+
+      it("which has a second input decreases trust to zero", () => {
+        trustDecreasingMTX.inputs.push(testHelpers.getP2PKHInput(addr.alice.pubKey));
+        tir.addTX(trustDecreasingMTX.toTX());
+
+        tir.getDirectTrust(alice, bob).should.equal(0);
+      });
+
+      it("which has more than one trust outputs decreases trust to zero", () => {
+        trustDecreasingMTX.outputs[0].value -= 15 * COIN;
+        trustDecreasingMTX.outputs.push(
+            testHelpers.getOneOfTwoMultisigOutput(addr.alice.pubKey, addr.bob.pubKey, 5 * COIN));
+        tir.addTX(trustDecreasingMTX.toTX());
+
+        tir.getDirectTrust(alice, bob).should.equal(0);
+      });
+    });
+  });
+
+  describe(".createTrustIncreasingMTX()", () => {
+    it("creates valid trust-increasing transactions", async () => {
+      var getTXStub = sinon.stub(node, "getCoin");
+
+      var prevOutput = {
+        hash: "v1pnhp2af4r5wz63j60vnh27s1bftl260qq621y458tn0g4x64u64yqz6d7qi6i8",
+        index: 1
+      };
+
+      getTXStub.withArgs(prevOutput.hash).returns(new Coin({
+        script: testHelpers.getP2PKHOutput(alice, 1).script,
+        value: 1000 * COIN
+      }));
+
+      var mtx = await tir.createTrustIncreasingMTX(addr.alice.privKey, addr.bob.pubKey, prevOutput,
+          100 * COIN);
+
+      mtx.inputs.length.should.equal(1);
+
+      mtx.outputs.length.should.equal(2);
+
+      var trustOutput = mtx.outputs[0];
+      trustOutput.getType().should.equal("multisig");
+      [1, 2].map((i) => helpers.pubKeyToEntity(trustOutput.script.get(i))).sort()
+          .should.deepEqual([alice, bob].sort());
+      trustOutput.value.should.equal(100 * COIN);
+
+      var changeOutput = mtx.outputs[1];
+      changeOutput.getType().should.equal("pubkeyhash");
+      changeOutput.getAddress().toBase58().should.equal(alice);
+      changeOutput.value.should.equal(900 * COIN - 1000);
+    });
+  });
+
+  describe(".getTrustDecreasingMTX()", () => {
+    var trustTXs;
+    beforeEach(() => {
+      var tx;
+      trustTXs = [];
+
+      tx = trustIncreasingTX;
+      trustTXs.push(tx);
+      tir.addTX(tx);
+
+      trustIncreasingMTX.outputs[0].value = 100 * COIN;
+      tx = trustIncreasingMTX.toTX();
+      trustTXs.push(tx);
+      tir.addTX(tx);
+
+      trustIncreasingMTX.outputs[0].value = 500 * COIN;
+      tx = trustIncreasingMTX.toTX();
+      trustTXs.push(tx);
+      tir.addTX(tx);
+
+      // Total trust 642 BTC
+    });
+
+    // Helper specific to the next couple of tests:
+    // Checks that mtxs is a list of two trust decreasing transactions. The first one spends the
+    // entire first trust increasing transaction, and the second spends part of the second.
+    // Also checks that the reduced trust is sent via P2PKH outputs to the correct recipient.
+    var checkMTXs = (mtxs, recipient) => {
+      mtxs.length.should.equal(2);
+
+      var mtx = mtxs[0];
+
+      mtx.inputs.length.should.equal(1);
+      mtx.inputs[0].prevout.should.have.properties({
+        hash: trustTXs[0].hash().toString("hex"),
+        index: 0
+      });
+
+      mtx.outputs.length.should.equal(1); // Single P2PKH output
+      mtx.outputs[0].getType().should.equal("pubkeyhash");
+      mtx.outputs[0].getAddress().toBase58().should.equal(recipient);
+      mtx.outputs[0].value.should.equal(42 * COIN - 1000);
+
+      mtx = mtxs[1];
+
+      mtx.inputs.length.should.equal(1);
+      mtx.inputs[0].prevout.should.have.properties({
+        hash: trustTXs[1].hash().toString("hex"),
+        index: 0
+      });
+
+      mtx.outputs.length.should.equal(2); // One P2PKH output and one multisig trust output
+      mtx.outputs[1].script.toString().should.equal(trustTXs[1].outputs[0].script.toString());
+      mtx.outputs[1].value.should.equal(60 * COIN);
+      mtx.outputs[0].getType().should.equal("pubkeyhash");
+      mtx.outputs[0].getAddress().toBase58().should.equal(recipient);
+      mtx.outputs[0].value.should.equal(40 * COIN - 1000);
+    };
+
+    it("creates correct trust decreasing transactions", () => {
+      var mtxs = tir.createTrustDecreasingMTXs(addr.alice.privKey, addr.bob.pubKey, 82 * COIN);
+      checkMTXs(mtxs, alice);
+    });
+
+    it("creates correct trust stealing transactions", () => {
+      var mtxs = tir.createTrustDecreasingMTXs(addr.alice.privKey, addr.bob.pubKey, 82 * COIN, charlie);
+      checkMTXs(mtxs, charlie);
+    });
+
+    it("throws when trying to decrease self-trust", () => {
+      should.throws(() => tir.createTrustDecreasingMTXs(addr.alice.privKey, addr.alice.pubKey, 10 * COIN)
+          , /self-trust/i);
+    });
+
+    it("throws when there is not enough trust", () => {
+      should.throws(() => tir.createTrustDecreasingMTXs(addr.alice.privKey, addr.bob.pubKey, 700 * COIN)
+        , /insufficient trust/i);
+      
+    });
+  });
+
+  describe(".getIndirectTrust()", () => {
+    it("returns zero for two arbitary parties that do not trust each other", () => {
+      should(tir.getIndirectTrust(alice, bob)).equal(0);
+      should(tir.getIndirectTrust(bob, alice)).equal(0);
+      should(tir.getIndirectTrust(charlie, alice)).equal(0);
+      should(tir.getIndirectTrust(alice, charlie)).equal(0);
+    });     
+
+    it("returns Infinity for one's trust to themselves", () => {
+      should(tir.getIndirectTrust(alice, alice)).equal(Infinity);
+      should(tir.getIndirectTrust(bob, bob)).equal(Infinity);
+    });
+
+    describe("after applying the Nobody Likes Frank graph example", () => {
+      beforeEach(() => {
+        testHelpers.applyGraph(tir, "./graphs/nobodyLikesFrank.json", addr);
+      });
+
+      it("correctly computes trusts", () => {
+        should(tir.getIndirectTrust(alice, alice)).equal(Infinity);
+        should(tir.getIndirectTrust(alice, bob)).equal(10);
+        should(tir.getIndirectTrust(alice, charlie)).equal(1);
+        should(tir.getIndirectTrust(alice, dave)).equal(4);
+        should(tir.getIndirectTrust(alice, eve)).equal(6);
+        should(tir.getIndirectTrust(alice, frank)).equal(0);
+        should(tir.getIndirectTrust(alice, george)).equal(2);
+
+        should(tir.getIndirectTrust(bob, alice)).equal(1);
+        should(tir.getIndirectTrust(bob, bob)).equal(Infinity);
+        should(tir.getIndirectTrust(bob, charlie)).equal(1);
+        should(tir.getIndirectTrust(bob, dave)).equal(1);
+        should(tir.getIndirectTrust(bob, eve)).equal(3);
+        should(tir.getIndirectTrust(bob, frank)).equal(0);
+        should(tir.getIndirectTrust(bob, george)).equal(2);
+
+        should(tir.getIndirectTrust(charlie, alice)).equal(0);
+        should(tir.getIndirectTrust(charlie, bob)).equal(0);
+        should(tir.getIndirectTrust(charlie, charlie)).equal(Infinity);
+        should(tir.getIndirectTrust(charlie, dave)).equal(0);
+        should(tir.getIndirectTrust(charlie, eve)).equal(0);
+        should(tir.getIndirectTrust(charlie, frank)).equal(0);
+        should(tir.getIndirectTrust(charlie, george)).equal(3);
+
+        should(tir.getIndirectTrust(dave, alice)).equal(2);
+        should(tir.getIndirectTrust(dave, bob)).equal(2);
+        should(tir.getIndirectTrust(dave, charlie)).equal(1);
+        should(tir.getIndirectTrust(dave, dave)).equal(Infinity);
+        should(tir.getIndirectTrust(dave, eve)).equal(12);
+        should(tir.getIndirectTrust(dave, frank)).equal(0);
+        should(tir.getIndirectTrust(dave, george)).equal(2);
+
+        should(tir.getIndirectTrust(eve, alice)).equal(0);
+        should(tir.getIndirectTrust(eve, bob)).equal(0);
+        should(tir.getIndirectTrust(eve, charlie)).equal(0);
+        should(tir.getIndirectTrust(eve, dave)).equal(0);
+        should(tir.getIndirectTrust(eve, eve)).equal(Infinity);
+        should(tir.getIndirectTrust(eve, frank)).equal(0);
+        should(tir.getIndirectTrust(eve, george)).equal(0);
+
+        should(tir.getIndirectTrust(frank, alice)).equal(0);
+        should(tir.getIndirectTrust(frank, bob)).equal(0);
+        should(tir.getIndirectTrust(frank, charlie)).equal(10);
+        should(tir.getIndirectTrust(frank, dave)).equal(0);
+        should(tir.getIndirectTrust(frank, eve)).equal(0);
+        should(tir.getIndirectTrust(frank, frank)).equal(Infinity);
+        should(tir.getIndirectTrust(frank, george)).equal(3);
+
+        should(tir.getIndirectTrust(george, alice)).equal(0);
+        should(tir.getIndirectTrust(george, bob)).equal(0);
+        should(tir.getIndirectTrust(george, charlie)).equal(0);
+        should(tir.getIndirectTrust(george, dave)).equal(0);
+        should(tir.getIndirectTrust(george, eve)).equal(0);
+        should(tir.getIndirectTrust(george, frank)).equal(0);
+        should(tir.getIndirectTrust(george, george)).equal(Infinity);
+      });
+
+      it("correctly computes trusts when bob trusts frank", () => {
+        tir.addTX(testHelpers.getTrustIncreasingMTX(addr.bob.pubKey, addr.frank.pubKey, 8).toTX());
+        should(tir.getIndirectTrust(george, frank)).equal(0);
+        should(tir.getIndirectTrust(alice, frank)).equal(8);
+        should(tir.getIndirectTrust(dave, frank)).equal(2);
+        should(tir.getIndirectTrust(bob, frank)).equal(8);
+      });
+
+      // TODO: Decrement direct trusts and test that indirect trusts update correctly
+    });
+  });
+});