Spv implementation

.eslintrc.json

@@ -30,7 +30,8 @@
 			],
       "flowtype/space-before-type-colon": 0,
       "no-undef": 0,
-      "no-unused-vars": 0
+      "no-unused-vars": 0,
+      "no-console": 0
 	},
 	"settings": {
 		"flowtype": {

etc/tag-generator.py

@@ -0,0 +1,27 @@
+# Thanks to http://code.activestate.com/recipes/577821-integer-square-root-function/ for isqrt()
+def isqrt(x):
+     if x < 0:
+         raise ValueError('square root not defined for negative numbers')
+     n = int(x)
+     if n == 0:
+         return 0
+     a, b = divmod(n.bit_length(), 2)
+     x = 2**(a+b)
+     while True:
+         y = (x + n//x)//2
+         if y >= x:
+             return x
+         x = y
+
+x = 0x5472757374206973205269736b00000000000000000000000000000000000000
+# 54:72:75:73:74:20:69:73:20:52:69:73:6b is the ASCII representation of "Trust is Risk"
+p = 2**256 - 2**32 - 977
+y = pow((x**3 + 7), (p+1)//4, p)
+
+while ((y**2) % p) != (x**3 + 7) % p:
+  x=x+1
+  y = pow((x**3 + 7), (p+1)//4, p)
+
+print("Found it!")
+print("x is " + hex(x))
+print("y is " + hex(y))

flow-typed/npm/bcoin_vx.x.x.js

@@ -3,12 +3,23 @@
 type Hash = (string | Buffer);
 type Network = any;
 
-declare class bcoin$FullNode {
+declare class bcoin$Node {
   on(eventName : string, eventHandler : Function) : void;
   getTX(hash : Hash) : Promise<bcoin$TX>;
   getCoin(hash : Hash, index : number) : bcoin$Coin;
 }
 
+declare class bcoin$FullNode extends bcoin$Node {}
+
+declare class bcoin$SPVNode extends bcoin$Node {
+  pool : bcoin$Pool;
+  //TODO Check if changes/additions are needed
+}
+
+declare class bcoin$Pool {
+  watchAddress(address : Buffer) : void;
+}
+
 declare class bcoin$Address {
   toBase58() : string;
   hash : Buffer;
@@ -73,6 +84,7 @@ declare class bcoin$KeyRing {
 
   getPublicKey() : Buffer;
   getPrivateKey() : Buffer;
+  getAddress() : Buffer;
 }
 
 declare class bcoin$Coin extends bcoin$Output {
@@ -83,7 +95,9 @@ declare class bcoin$Coin extends bcoin$Output {
 declare module 'bcoin' {
   declare module.exports: {
     fullnode : Class<bcoin$FullNode>,
+    spvnode : Class<bcoin$SPVNode>,
     script : Class<bcoin$Script>,
+    pool : Class<bcoin$Pool>,
     primitives : {
       Address : Class<bcoin$Address>,
       TX : Class<bcoin$TX>,
@@ -95,8 +109,12 @@ declare module 'bcoin' {
       Coin : Class<bcoin$Coin>
     },
     crypto : {
-      hash160(str : (string | Buffer)) : Hash
-    }
+      hash160(str : (string | Buffer)) : Hash,
+      hash256(str : (string | Buffer)) : Hash
+    },
+    base58 : {
+      encode(str : (string | Buffer)) : Buffer
+    },
   }
 }