Add LBRY Support

Been chatting with the Ren team on Telegram and we are very eager to add support for renLBC!

We're a fork of Bitcoin Core, so integration should be fairly straightforward.

Note: Rebased and made updates to LBRY params on 1/20/2021. Happy New Year Ren Team, looking forward to working together.

chain/lbry/address.go

@@ -0,0 +1,14 @@
+package lbry
+
+import "github.com/renproject/multichain/chain/bitcoin"
+
+type (
+	// AddressEncoder re-exports bitcoin.AddressEncoder.
+	AddressEncoder = bitcoin.AddressEncoder
+
+	// AddressDecoder re-exports bitcoin.AddressDecoder.
+	AddressDecoder = bitcoin.AddressDecoder
+
+	// AddressEncodeDecoder re-exports bitcoin.AddressEncodeDecoder.
+	AddressEncodeDecoder = bitcoin.AddressEncodeDecoder
+)

chain/lbry/address_test.go

@@ -0,0 +1 @@
+package lbry_test

chain/lbry/gas.go

@@ -0,0 +1,9 @@
+package lbry
+
+import "github.com/renproject/multichain/chain/bitcoin"
+
+// GasEstimator re-exports bitcoin.GasEstimator.
+type GasEstimator = bitcoin.GasEstimator
+
+// NewGasEstimator re-exports bitcoin.NewGasEstimator.
+var NewGasEstimator = bitcoin.NewGasEstimator

chain/lbry/gas_test.go

@@ -0,0 +1,52 @@
+package lbry_test
+
+import (
+	"context"
+
+	"github.com/renproject/multichain/chain/lbry"
+	"github.com/renproject/pack"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Gas", func() {
+	Context("when estimating LBRY network fee", func() {
+		It("should work", func() {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			client := lbry.NewClient(lbry.DefaultClientOptions())
+
+			// estimate fee to include tx within 1 block.
+			fallback1 := uint64(123)
+			gasEstimator1 := lbry.NewGasEstimator(client, 1, pack.NewU256FromUint64(fallback1))
+			gasPrice1, _, err := gasEstimator1.EstimateGas(ctx)
+			if err != nil {
+				Expect(gasPrice1).To(Equal(pack.NewU256FromUint64(fallback1)))
+			}
+
+			// estimate fee to include tx within 10 blocks.
+			fallback2 := uint64(234)
+			gasEstimator2 := lbry.NewGasEstimator(client, 10, pack.NewU256FromUint64(fallback2))
+			gasPrice2, _, err := gasEstimator2.EstimateGas(ctx)
+			if err != nil {
+				Expect(gasPrice2).To(Equal(pack.NewU256FromUint64(fallback2)))
+			}
+
+			// estimate fee to include tx within 100 blocks.
+			fallback3 := uint64(345)
+			gasEstimator3 := lbry.NewGasEstimator(client, 100, pack.NewU256FromUint64(fallback3))
+			gasPrice3, _, err := gasEstimator3.EstimateGas(ctx)
+			if err != nil {
+				Expect(gasPrice3).To(Equal(pack.NewU256FromUint64(fallback3)))
+			}
+
+			// expect fees in this order at the very least.
+			if err == nil {
+				Expect(gasPrice1.GreaterThanEqual(gasPrice2)).To(BeTrue())
+				Expect(gasPrice2.GreaterThanEqual(gasPrice3)).To(BeTrue())
+			}
+		})
+	})
+})

chain/lbry/lbry.go

@@ -0,0 +1,177 @@
+package lbry
+
+import (
+	"time"
+
+	"github.com/btcsuite/btcd/chaincfg"
+	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/wire"
+)
+
+func init() {
+	if err := chaincfg.Register(&MainNetParams); err != nil {
+		panic(err)
+	}
+	if err := chaincfg.Register(&TestNetParams); err != nil {
+		panic(err)
+	}
+	if err := chaincfg.Register(&RegressionNetParams); err != nil {
+		panic(err)
+	}
+}
+
+// genesisCoinbaseTx is the coinbase transaction for the genesis blocks for
+// the main network, regression test network, and test network (version 3).
+var genesisCoinbaseTx = wire.MsgTx{
+	Version: 1,
+	TxIn: []*wire.TxIn{
+		{
+			PreviousOutPoint: wire.OutPoint{
+				Hash:  chainhash.Hash{},
+				Index: 0xffffffff,
+			},
+			SignatureScript: []byte{
+				0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x04, 0x17,
+				0x69, 0x6e, 0x73, 0x65, 0x72, 0x74, 0x20, 0x74,
+				0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70,
+				0x20, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67,
+			},
+			Sequence: 0xffffffff,
+		},
+	},
+	TxOut: []*wire.TxOut{
+		{
+			Value: 0x12a05f200,
+			PkScript: []byte{
+				0x76, 0xa9, 0x14, 0x34, 0x59, 0x91, 0xdb, 0xf5,
+				0x7b, 0xfb, 0x01, 0x4b, 0x87, 0x00, 0x6a, 0xcd,
+				0xfa, 0xfb, 0xfc, 0x5f, 0xe8, 0x29, 0x2f, 0x88,
+				0xac,
+			},
+		},
+	},
+	LockTime: 0,
+}
+
+// https://github.com/lbryio/lbrycrd/blob/master/src/chainparams.cpp#L19
+var genesisMerkleRoot = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet happy.
+	0xcc, 0x59, 0xe5, 0x9f, 0xf9, 0x7a, 0xc0, 0x92,
+	0xb5, 0x5e, 0x42, 0x3a, 0xa5, 0x49, 0x51, 0x51,
+	0xed, 0x6f, 0xb8, 0x05, 0x70, 0xa5, 0xbb, 0x78,
+	0xcd, 0x5b, 0xd1, 0xc3, 0x82, 0x1c, 0x21, 0xb8,
+})
+
+var genesisBlock = wire.MsgBlock{
+	Header: wire.BlockHeader{
+		Version:    1,
+		PrevBlock:  chainhash.Hash{},         // 0000000000000000000000000000000000000000000000000000000000000000
+		MerkleRoot: genesisMerkleRoot,        // b8211c82c3d15bcd78bba57005b86fed515149a53a425eb592c07af99fe559cc
+		Timestamp:  time.Unix(1446058291, 0), // Wednesday, October 28, 2015 6:51:31 PM GMT
+		Bits:       0x1f00ffff,
+		Nonce:      1287,
+	},
+	Transactions: []*wire.MsgTx{&genesisCoinbaseTx},
+}
+
+var genesisHash = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet happy.
+	0x63, 0xf4, 0x34, 0x6a, 0x4d, 0xb3, 0x4f, 0xdf,
+	0xce, 0x29, 0xa7, 0x0f, 0x5e, 0x8d, 0x11, 0xf0,
+	0x65, 0xf6, 0xb9, 0x16, 0x02, 0xb7, 0x03, 0x6c,
+	0x7f, 0x22, 0xf3, 0xa0, 0x3b, 0x28, 0x89, 0x9c,
+})
+
+func newHashFromStr(hexStr string) *chainhash.Hash {
+	hash, err := chainhash.NewHashFromStr(hexStr)
+	if err != nil {
+		panic(err)
+	}
+	return hash
+}
+
+// MainNetParams returns the chain configuration for mainnet.
+var MainNetParams = chaincfg.Params{
+	Name:        "mainnet",
+	Net:         0xfae4aaf1,
+	DefaultPort: "9246",
+
+	// Chain parameters
+	GenesisBlock: &genesisBlock,
+	GenesisHash:  &genesisHash,
+
+	// Address encoding magics
+	PubKeyHashAddrID:        85,
+	ScriptHashAddrID:        122,
+	PrivateKeyID:            28,
+	WitnessPubKeyHashAddrID: 0x06, // starts with p2
+	WitnessScriptHashAddrID: 0x0A, // starts with 7Xh
+	BIP0034Height:           1,
+	BIP0065Height:           200000,
+	BIP0066Height:           200000,
+
+	// BIP32 hierarchical deterministic extended key magics
+	HDPrivateKeyID: [4]byte{0x04, 0x88, 0xad, 0xe4}, // starts with xprv
+	HDPublicKeyID:  [4]byte{0x04, 0x88, 0xb2, 0x1e}, // starts with xpub
+
+	// Human-readable part for Bech32 encoded segwit addresses, as defined in
+	// BIP 173.
+	Bech32HRPSegwit: "lbc",
+
+	// BIP44 coin type used in the hierarchical deterministic path for
+	// address generation.
+	HDCoinType: 0x8c,
+}
+
+// TestNetParams returns the chain configuration for testnet.
+var TestNetParams = chaincfg.Params{
+	Name:        "testnet",
+	Net:         0xfae4aae1,
+	DefaultPort: "19246",
+
+	// Chain parameters
+	GenesisBlock: &genesisBlock,
+	GenesisHash:  &genesisHash,
+
+	// Address encoding magics
+	PubKeyHashAddrID: 111,
+	ScriptHashAddrID: 196,
+	PrivateKeyID:     239,
+
+	// BIP32 hierarchical deterministic extended key magics
+	HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94}, // starts with xprv
+	HDPublicKeyID:  [4]byte{0x04, 0x35, 0x87, 0xcf}, // starts with xpub
+
+	// Human-readable part for Bech32 encoded segwit addresses, as defined in
+	// BIP 173.
+	Bech32HRPSegwit: "tlbc",
+
+	// BIP44 coin type used in the hierarchical deterministic path for
+	// address generation.
+	HDCoinType: 0x8c,
+}
+
+// RegressionNetParams returns the chain configuration for regression net.
+var RegressionNetParams = chaincfg.Params{
+	Name: "regtest",
+
+	// LBRY has 0xfae4aad1 as RegTest (same as Bitcoin's RegTest).
+	// Setting it to an arbitrary value (leet_hex(LBRY)), so that we can
+	// register the regtest network.
+	Net: 0xfae4aad1,
+
+	// Address encoding magics
+	PubKeyHashAddrID: 111,
+	ScriptHashAddrID: 196,
+	PrivateKeyID:     239,
+
+	// BIP32 hierarchical deterministic extended key magics
+	HDPrivateKeyID: [4]byte{0x04, 0x35, 0x83, 0x94}, // starts with xprv
+	HDPublicKeyID:  [4]byte{0x04, 0x35, 0x87, 0xcf}, // starts with xpub
+
+	// Human-readable part for Bech32 encoded segwit addresses, as defined in
+	// BIP 173.
+	Bech32HRPSegwit: "rlbc",
+
+	// BIP44 coin type used in the hierarchical deterministic path for
+	// address generation.
+	HDCoinType: 0x8c,
+}

chain/lbry/lbry_suite_test.go

@@ -0,0 +1,13 @@
+package lbry_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestLBRY(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "LBRY Suite")
+}