Eth draft support

index.js

@@ -5,8 +5,7 @@ const bignum  = require('bignum');
 const bitcoin = require('bitcoinjs-lib');
 const varuint = require('varuint-bitcoin');
 const crypto  = require('crypto');
-const promise = require('promise');
-const merklebitcoin = promise.denodeify(require('merkle-bitcoin'));
+const fastMerkleRoot = require('merkle-lib/fastRoot');
 
 function scriptCompile(addrHash) {
   return bitcoin.script.compile([
@@ -37,23 +36,32 @@ function txesHaveWitnessCommit(transactions) {
   );
 }
 
-function hash256(buffer) {
+function sha256(buffer) {
   return crypto.createHash('sha256').update(buffer).digest();
 };
 
+function hash256(buffer) {
+  return sha256(sha256(buffer));
+};
+
 function getMerkleRoot(transactions) {
-  if (transactions.length === 0) return null;
-  if (transactions.length === 1) return transactions[0].getHash();
-  let hashes = [ reverseBuffer(transactions[0]).toString('hex') ];
-  transactions.split(1).forEach(function (value) {
-    hashes.push(value.hash);
-  });
-  return reverseBuffer(new Buffer(Object.values(merklebitcoin(hashes))[2].root, 'hex'));
+  if (transactions.length === 0) return new Buffer('0000000000000000000000000000000000000000000000000000000000000000', 'hex')
+  const forWitness = txesHaveWitnessCommit(transactions);
+  const hashes = transactions.map(transaction => transaction.getHash(forWitness));
+  const rootHash = fastMerkleRoot(hashes, hash256);
+  return forWitness ? hash256(Buffer.concat([rootHash, transactions[0].ins[0].witness[0]])) : rootHash;
 }
 
 let last_epoch_number;
 let last_seed_hash;
-const diff1 = 0x00000000ff000000000000000000000000000000000000000000000000000000;
+
+module.exports.baseDiff = function() {
+  return bignum('FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF', 16);
+};
+
+module.exports.baseRavenDiff = function() {
+  return parseInt('0x00000000ff000000000000000000000000000000000000000000000000000000');
+};
 
 module.exports.RavenBlockTemplate = function(rpcData, poolAddress) {
   const poolAddrHash = bitcoin.address.fromBase58Check(poolAddress).hash;
@@ -127,7 +135,7 @@ module.exports.RavenBlockTemplate = function(rpcData, poolAddress) {
     last_epoch_number = epoch_number;
   }
 
-  const difficulty = parseFloat((diff1 / bignum(rpcData.target, 16).toNumber()).toFixed(9));
+  const difficulty = parseFloat((module.exports.baseRavenDiff() / bignum(rpcData.target, 16).toNumber()).toFixed(9));
 
   return {
     blocktemplate_blob: blob.toString('hex'),
@@ -138,6 +146,7 @@ module.exports.RavenBlockTemplate = function(rpcData, poolAddress) {
     difficulty:         difficulty,
     height:             rpcData.height,
     bits:               rpcData.bits,
+    prev_hash:          rpcData.previousblockhash,
   };
 };
 
@@ -157,7 +166,7 @@ function update_merkle_root_hash(blob_in, blob_out) {
 module.exports.convertRavenBlob = function(blobBuffer) {
   let header = blobBuffer.slice(0, 80);
   update_merkle_root_hash(blobBuffer, header);
-  return reverseBuffer(hash256(hash256(header)));
+  return reverseBuffer(hash256(header));
 };
 
 module.exports.constructNewRavenBlob = function(blockTemplate, nonceBuff, mixhashBuff) {
@@ -170,4 +179,14 @@ module.exports.constructNewRavenBlob = function(blockTemplate, nonceBuff, mixhas
 module.exports.constructNewDeroBlob = function(blockTemplate, nonceBuff) {
   nonceBuff.copy(blockTemplate, 39, 0, 4);
   return blockTemplate;
+};
+
+module.exports.EthBlockTemplate = function(rpcData) {
+  const difficulty = (module.exports.baseDiff() / bignum(rpcData[2].substr(2), 16)).toNumber();
+  return {
+    hash:               rpcData[0].substr(2),
+    seed_hash:          rpcData[1].substr(2),
+    difficulty:         difficulty,
+    height:             parseInt(rpcData[3])
+  };
 };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "cryptoforknote-util",
-  "version": "9.0.14",
+  "version": "9.1.3",
   "main": "cryptoforknote-util",
   "author": {
     "name": "LucasJones",
@@ -17,8 +17,7 @@
     "bignum":   "^0.13.1",
     "sha3":     "*",
     "varuint-bitcoin": "^1.0.4",
-    "bitcoinjs-lib":   "git+https://github.com/bitcoinjs/bitcoinjs-lib.git#533d6c2e6d0aa4111f7948b1c12003cf6ef83137",
-    "merkle-bitcoin":  "git+https://github.com/CloudMining/merkle-bitcoin.git#ec00ae20ba60d444e150ead03c747695ddaa83a1"
+    "bitcoinjs-lib":   "git+https://github.com/bitcoinjs/bitcoinjs-lib.git#533d6c2e6d0aa4111f7948b1c12003cf6ef83137"
   },
   "keywords": [
     "cryptonight",