Repository: bitcoinjs/bitcoinjs-lib
Pull request #438 (2015-08-14 01:36:54)

No Script
Ref: https://github.com/bitcoinjs/bitcoinjs-lib/issues/407#issuecomment-128611249

> I didn't realise before, but Script is a major component which could be simplified down to a Buffer for interop.
> With modules like https://github.com/bitcoinjs/bip69 coming up, the ability to reduce this part of the API would be asimilar to the changes made to Address.

Overall, this is part of #407.
The performance is the same,  we just stopped using `Script` as a data interchange.
You are now either explicitly dealing with the decompilation result of a script (aka, chunks) after a `scripts.decompile`,  or you are dealing with a `Buffer` which is a script.

This also means you can now pass your script directly to `Transaction` without having to decompile it first.

I also merged `Script` and `scripts`, which makes the interface smaller and cleaner IMHO,  open to feedback though.  

Chained on #434 , but **not** dependent.

**Comparison link:** https://github.com/bitcoinjs/bitcoinjs-lib/compare/noassert...noscript

dcousens: My motivation for this is mostly interchange between libraries.  I wanted to be able to agnostically work with scripts,  and yet most of the `bitcoinjs-lib` interface requires me to "pre-parse" the script using `Script.fromBuffer` or what not.
This was especially annoying if I had no need to actually decompile the script anyway,  so it was just a fruitless operation for the sake of an abstraction.
jprichardson: All of the assert changes / typeforce changes to this PR makes this more painful to review... granularity ftw :)

While I've always thought Script was a useful abstraction, I understand the motivation, especially regarding interoperability. So I am OK with this. Would like to know what @weilu thinks.
dcousens: > All of the assert changes / typeforce changes to this PR makes this more painful to review... granularity ftw :)

Did you check the comparison link? (See https://github.com/bitcoinjs/bitcoinjs-lib/compare/noassert...noscript)
dcousens: Waiting on ACK for #434 before merge.
weilu: Overall this change does enable the use of primitive/native types, but at the cost of abstraction. It used to be Script is an abstraction with two forms of representation -- chunks and buffer. Now that's no longer the case. I personally still find the version with the Script abstraction easier to reason, but it could be just me.
weilu: Granted I don't work with script enough, so if @dcousens feels strong enough to merge this, then go ahead :)
dcousens: After further discussion of `compile` v `decompile` with @weilu,  I'm now on the fence as to whether `compileToBuffer` would be a better name to indicate the target type more clearly. 
dcousens: Rebased on master

Patch:
diff --git a/README.md b/README.md
index 3d22a74b..93cc4c52 100644
--- a/README.md
+++ b/README.md
@@ -98,9 +98,9 @@ The below examples are implemented as integration tests, they should be very eas
 - [Create a 2-of-3 multisig P2SH address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/multisig.js#L8)
 - [Spend from a 2-of-4 multisig P2SH address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/multisig.js#L22)
 - [Generate a single-key stealth address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/crypto.js#L7)
-- [Generate a dual-key stealth address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/crypto.js#L51)
-- [Recover a BIP32 parent private key from the parent public key and a derived non-hardened child private key](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/crypto.js#L53)
-- [Recover a Private key from duplicate R values in a signature](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/crypto.js#L100)
+- [Generate a dual-key stealth address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/crypto.js#L44)
+- [Recover a BIP32 parent private key from the parent public key and a derived non-hardened child private key](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/crypto.js#L46)
+- [Recover a Private key from duplicate R values in a signature](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/crypto.js#L92)
 
 
 ## Projects utilizing BitcoinJS
diff --git a/src/address.js b/src/address.js
index 879b0893..f5fb2153 100644
--- a/src/address.js
+++ b/src/address.js
@@ -1,7 +1,7 @@
 var base58check = require('bs58check')
-var typeforce = require('typeforce')
 var networks = require('./networks')
 var scripts = require('./scripts')
+var typeforce = require('typeforce')
 var types = require('./types')
 
 function fromBase58Check (address) {
@@ -18,10 +18,11 @@ function fromBase58Check (address) {
 function fromOutputScript (script, network) {
   network = network || networks.bitcoin
 
-  if (scripts.isPubKeyHashOutput(script)) return toBase58Check(script.chunks[2], network.pubKeyHash)
-  if (scripts.isScriptHashOutput(script)) return toBase58Check(script.chunks[1], network.scriptHash)
+  var chunks = scripts.decompile(script)
+  if (scripts.isPubKeyHashOutput(chunks)) return toBase58Check(chunks[2], network.pubKeyHash)
+  if (scripts.isScriptHashOutput(chunks)) return toBase58Check(chunks[1], network.scriptHash)
 
-  throw new Error(script.toASM() + ' has no matching Address')
+  throw new Error(scripts.toASM(chunks) + ' has no matching Address')
 }
 
 function toBase58Check (hash, version) {
diff --git a/src/index.js b/src/index.js
index 8f4a8d76..80d8f496 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,16 +1,16 @@
 module.exports = {
   Address: require('./address'),
   Block: require('./block'),
-  bufferutils: require('./bufferutils'),
-  crypto: require('./crypto'),
   ECPair: require('./ecpair'),
   ECSignature: require('./ecsignature'),
-  message: require('./message'),
-  opcodes: require('./opcodes'),
   HDNode: require('./hdnode'),
-  Script: require('./script'),
-  scripts: require('./scripts'),
   Transaction: require('./transaction'),
   TransactionBuilder: require('./transaction_builder'),
-  networks: require('./networks')
+
+  bufferutils: require('./bufferutils'),
+  crypto: require('./crypto'),
+  message: require('./message'),
+  networks: require('./networks'),
+  opcodes: require('./opcodes'),
+  scripts: require('./scripts')
 }
diff --git a/src/script.js b/src/script.js
deleted file mode 100644
index 211c74d4..00000000
--- a/src/script.js
+++ /dev/null
@@ -1,147 +0,0 @@
-var bufferutils = require('./bufferutils')
-var crypto = require('./crypto')
-var typeforce = require('typeforce')
-var types = require('./types')
-var opcodes = require('./opcodes')
-
-function Script (buffer, chunks) {
-  typeforce(types.tuple(types.Buffer, types.Array), arguments)
-
-  this.buffer = buffer
-  this.chunks = chunks
-}
-
-Script.fromASM = function (asm) {
-  var strChunks = asm.split(' ')
-  var chunks = strChunks.map(function (strChunk) {
-    // opcode
-    if (strChunk in opcodes) {
-      return opcodes[strChunk]
-
-    // data chunk
-    } else {
-      return new Buffer(strChunk, 'hex')
-    }
-  })
-
-  return Script.fromChunks(chunks)
-}
-
-Script.fromBuffer = function (buffer) {
-  var chunks = []
-  var i = 0
-
-  while (i < buffer.length) {
-    var opcode = buffer.readUInt8(i)
-
-    // data chunk
-    if ((opcode > opcodes.OP_0) && (opcode <= opcodes.OP_PUSHDATA4)) {
-      var d = bufferutils.readPushDataInt(buffer, i)
-
-      // did reading a pushDataInt fail? return non-chunked script
-      if (d === null) return new Script(buffer, [])
-      i += d.size
-
-      // attempt to read too much data?
-      if (i + d.number > buffer.length) return new Script(buffer, [])
-
-      var data = buffer.slice(i, i + d.number)
-      i += d.number
-
-      chunks.push(data)
-
-    // opcode
-    } else {
-      chunks.push(opcode)
-
-      i += 1
-    }
-  }
-
-  return new Script(buffer, chunks)
-}
-
-Script.fromChunks = function (chunks) {
-  typeforce(types.Array, chunks)
-
-  var bufferSize = chunks.reduce(function (accum, chunk) {
-    // data chunk
-    if (Buffer.isBuffer(chunk)) {
-      return accum + bufferutils.pushDataSize(chunk.length) + chunk.length
-    }
-
-    // opcode
-    return accum + 1
-  }, 0.0)
-
-  var buffer = new Buffer(bufferSize)
-  var offset = 0
-
-  chunks.forEach(function (chunk) {
-    // data chunk
-    if (Buffer.isBuffer(chunk)) {
-      offset += bufferutils.writePushDataInt(buffer, chunk.length, offset)
-
-      chunk.copy(buffer, offset)
-      offset += chunk.length
-
-    // opcode
-    } else {
-      buffer.writeUInt8(chunk, offset)
-      offset += 1
-    }
-  })
-
-  if (offset !== buffer.length) throw new Error('Could not decode chunks')
-  return new Script(buffer, chunks)
-}
-
-Script.fromHex = function (hex) {
-  return Script.fromBuffer(new Buffer(hex, 'hex'))
-}
-
-Script.EMPTY = Script.fromChunks([])
-
-Script.prototype.equals = function (script) {
-  return bufferutils.equal(this.buffer, script.buffer)
-}
-
-Script.prototype.getHash = function () {
-  return crypto.hash160(this.buffer)
-}
-
-// FIXME: doesn't work for data chunks, maybe time to use buffertools.compare...
-Script.prototype.without = function (needle) {
-  return Script.fromChunks(this.chunks.filter(function (op) {
-    return op !== needle
-  }))
-}
-
-var reverseOps = []
-for (var op in opcodes) {
-  var code = opcodes[op]
-  reverseOps[code] = op
-}
-
-Script.prototype.toASM = function () {
-  return this.chunks.map(function (chunk) {
-    // data chunk
-    if (Buffer.isBuffer(chunk)) {
-      return chunk.toString('hex')
-
-    // opcode
-    } else {
-      return reverseOps[chunk]
-    }
-  }).join(' ')
-}
-
-Script.prototype.toBuffer = function () {
-  return this.buffer
-}
-
-Script.prototype.toHex = function () {
-  return this.toBuffer().toString('hex')
-}
-
-module.exports = Script
diff --git a/src/scripts.js b/src/scripts.js
index d6add2f1..ffd4f146 100644
--- a/src/scripts.js
+++ b/src/scripts.js
@@ -1,12 +1,120 @@
-var ops = require('./opcodes')
+var bufferutils = require('./bufferutils')
 var typeforce = require('typeforce')
 var types = require('./types')
 
+var ECSignature = require('./ecsignature')
 var ecurve = require('ecurve')
 var curve = ecurve.getCurveByName('secp256k1')
 
-var ECSignature = require('./ecsignature')
-var Script = require('./script')
+var OPS = require('./opcodes')
+var REVERSE_OPS = []
+for (var op in OPS) {
+  var code = OPS[op]
+  REVERSE_OPS[code] = op
+}
+
+function toASM (chunks) {
+  if (types.Buffer(chunks)) {
+    chunks = decompile(chunks)
+  }
+
+  return chunks.map(function (chunk) {
+    // data?
+    if (Buffer.isBuffer(chunk)) return chunk.toString('hex')
+
+    // opcode!
+    return REVERSE_OPS[chunk]
+  }).join(' ')
+}
+
+function fromASM (asm) {
+  typeforce(types.String, asm)
+
+  return compile(asm.split(' ').map(function (chunkStr) {
+    // opcode?
+    if (OPS[chunkStr] !== undefined) return OPS[chunkStr]
+
+    // data!
+    return new Buffer(chunkStr, 'hex')
+  }))
+}
+
+function compile (chunks) {
+  // TODO: remove me
+  if (types.Buffer(chunks)) return chunks
+
+  typeforce(types.Array, chunks)
+
+  var bufferSize = chunks.reduce(function (accum, chunk) {
+    // data chunk
+    if (Buffer.isBuffer(chunk)) {
+      return accum + bufferutils.pushDataSize(chunk.length) + chunk.length
+    }
+
+    // opcode
+    return accum + 1
+  }, 0.0)
+
+  var buffer = new Buffer(bufferSize)
+  var offset = 0
+
+  chunks.forEach(function (chunk) {
+    // data chunk
+    if (Buffer.isBuffer(chunk)) {
+      offset += bufferutils.writePushDataInt(buffer, chunk.length, offset)
+
+      chunk.copy(buffer, offset)
+      offset += chunk.length
+
+    // opcode
+    } else {
+      buffer.writeUInt8(chunk, offset)
+      offset += 1
+    }
+  })
+
+  if (offset !== buffer.length) throw new Error('Could not decode chunks')
+  return buffer
+}
+
+function decompile (buffer) {
+  // TODO: remove me
+  if (types.Array(buffer)) return buffer
+
+  typeforce(types.Buffer, buffer)
+
+  var chunks = []
+  var i = 0
+
+  while (i < buffer.length) {
+    var opcode = buffer.readUInt8(i)
+
+    // data chunk
+    if ((opcode > OPS.OP_0) && (opcode <= OPS.OP_PUSHDATA4)) {
+      var d = bufferutils.readPushDataInt(buffer, i)
+
+      // did reading a pushDataInt fail? empty script
+      if (d === null) return []
+      i += d.size
+
+      // attempt to read too much data? empty script
+      if (i + d.number > buffer.length) return []
+
+      var data = buffer.slice(i, i + d.number)
+      i += d.number
+
+      chunks.push(data)
+
+    // opcode
+    } else {
+      chunks.push(opcode)
+
+      i += 1
+    }
+  }
+
+  return chunks
+}
 
 function isCanonicalPubKey (buffer) {
   if (!Buffer.isBuffer(buffer)) return false
@@ -41,110 +149,124 @@ function isCanonicalSignature (buffer) {
 }
 
 function isPubKeyHashInput (script) {
-  return script.chunks.length === 2 &&
-    isCanonicalSignature(script.chunks[0]) &&
-    isCanonicalPubKey(script.chunks[1])
+  var chunks = decompile(script)
+
+  return chunks.length === 2 &&
+    isCanonicalSignature(chunks[0]) &&
+    isCanonicalPubKey(chunks[1])
 }
 
 function isPubKeyHashOutput (script) {
-  return script.chunks.length === 5 &&
-    script.chunks[0] === ops.OP_DUP &&
-    script.chunks[1] === ops.OP_HASH160 &&
-    Buffer.isBuffer(script.chunks[2]) &&
-    script.chunks[2].length === 20 &&
-    script.chunks[3] === ops.OP_EQUALVERIFY &&
-    script.chunks[4] === ops.OP_CHECKSIG
+  var chunks = decompile(script)
+
+  return chunks.length === 5 &&
+    chunks[0] === OPS.OP_DUP &&
+    chunks[1] === OPS.OP_HASH160 &&
+    Buffer.isBuffer(chunks[2]) &&
+    chunks[2].length === 20 &&
+    chunks[3] === OPS.OP_EQUALVERIFY &&
+    chunks[4] === OPS.OP_CHECKSIG
 }
 
 function isPubKeyInput (script) {
-  return script.chunks.length === 1 &&
-    isCanonicalSignature(script.chunks[0])
+  var chunks = decompile(script)
+
+  return chunks.length === 1 &&
+    isCanonicalSignature(chunks[0])
 }
 
 function isPubKeyOutput (script) {
-  return script.chunks.length === 2 &&
-    isCanonicalPubKey(script.chunks[0]) &&
-    script.chunks[1] === ops.OP_CHECKSIG
+  var chunks = decompile(script)
+
+  return chunks.length === 2 &&
+    isCanonicalPubKey(chunks[0]) &&
+    chunks[1] === OPS.OP_CHECKSIG
 }
 
 function isScriptHashInput (script, allowIncomplete) {
-  if (script.chunks.length < 2) return false
+  var chunks = decompile(script)
+  if (chunks.length < 2) return false
 
-  var lastChunk = script.chunks[script.chunks.length - 1]
+  var lastChunk = chunks[chunks.length - 1]
   if (!Buffer.isBuffer(lastChunk)) return false
 
-  var scriptSig = Script.fromChunks(script.chunks.slice(0, -1))
-  var redeemScript = Script.fromBuffer(lastChunk)
+  var scriptSigChunks = chunks.slice(0, -1)
+  var redeemScriptChunks = decompile(lastChunk)
 
   // is redeemScript a valid script?
-  if (redeemScript.chunks.length === 0) return false
+  if (redeemScriptChunks.length === 0) return false
 
-  return classifyInput(scriptSig, allowIncomplete) === classifyOutput(redeemScript)
+  return classifyInput(scriptSigChunks, allowIncomplete) === classifyOutput(redeemScriptChunks)
 }
 
 function isScriptHashOutput (script) {
-  return script.chunks.length === 3 &&
-    script.chunks[0] === ops.OP_HASH160 &&
-    Buffer.isBuffer(script.chunks[1]) &&
-    script.chunks[1].length === 20 &&
-    script.chunks[2] === ops.OP_EQUAL
+  var chunks = decompile(script)
+
+  return chunks.length === 3 &&
+    chunks[0] === OPS.OP_HASH160 &&
+    Buffer.isBuffer(chunks[1]) &&
+    chunks[1].length === 20 &&
+    chunks[2] === OPS.OP_EQUAL
 }
 
 // allowIncomplete is to account for combining signatures
 // See https://github.com/bitcoin/bitcoin/blob/f425050546644a36b0b8e0eb2f6934a3e0f6f80f/src/script/sign.cpp#L195-L197
 function isMultisigInput (script, allowIncomplete) {
-  if (script.chunks.length < 2) return false
-  if (script.chunks[0] !== ops.OP_0) return false
+  var chunks = decompile(script)
+  if (chunks.length < 2) return false
+  if (chunks[0] !== OPS.OP_0) return false
 
   if (allowIncomplete) {
-    return script.chunks.slice(1).every(function (chunk) {
-      return chunk === ops.OP_0 || isCanonicalSignature(chunk)
+    return chunks.slice(1).every(function (chunk) {
+      return chunk === OPS.OP_0 || isCanonicalSignature(chunk)
     })
   }
 
-  return script.chunks.slice(1).every(isCanonicalSignature)
+  return chunks.slice(1).every(isCanonicalSignature)
 }
 
 function isMultisigOutput (script) {
-  if (script.chunks.length < 4) return false
-  if (script.chunks[script.chunks.length - 1] !== ops.OP_CHECKMULTISIG) return false
-
-  var mOp = script.chunks[0]
-  if (mOp === ops.OP_0) return false
-  if (mOp < ops.OP_1) return false
-  if (mOp > ops.OP_16) return false
-
-  var nOp = script.chunks[script.chunks.length - 2]
-  if (nOp === ops.OP_0) return false
-  if (nOp < ops.OP_1) return false
-  if (nOp > ops.OP_16) return false
-
-  var m = mOp - (ops.OP_1 - 1)
-  var n = nOp - (ops.OP_1 - 1)
+  var chunks = decompile(script)
+  if (chunks.length < 4) return false
+  if (chunks[chunks.length - 1] !== OPS.OP_CHECKMULTISIG) return false
+
+  var mOp = chunks[0]
+  if (mOp === OPS.OP_0) return false
+  if (mOp < OPS.OP_1) return false
+  if (mOp > OPS.OP_16) return false
+
+  var nOp = chunks[chunks.length - 2]
+  if (nOp === OPS.OP_0) return false
+  if (nOp < OPS.OP_1) return false
+  if (nOp > OPS.OP_16) return false
+
+  var m = mOp - (OPS.OP_1 - 1)
+  var n = nOp - (OPS.OP_1 - 1)
   if (n < m) return false
 
-  var pubKeys = script.chunks.slice(1, -2)
+  var pubKeys = chunks.slice(1, -2)
   if (n < pubKeys.length) return false
 
   return pubKeys.every(isCanonicalPubKey)
 }
 
 function isNullDataOutput (script) {
-  return script.chunks[0] === ops.OP_RETURN
+  var chunks = decompile(script)
+  return chunks[0] === OPS.OP_RETURN
 }
 
 function classifyOutput (script) {
-  typeforce(types.Script, script)
+  var chunks = decompile(script)
 
-  if (isPubKeyHashOutput(script)) {
+  if (isPubKeyHashOutput(chunks)) {
     return 'pubkeyhash'
-  } else if (isScriptHashOutput(script)) {
+  } else if (isScriptHashOutput(chunks)) {
     return 'scripthash'
-  } else if (isMultisigOutput(script)) {
+  } else if (isMultisigOutput(chunks)) {
     return 'multisig'
-  } else if (isPubKeyOutput(script)) {
+  } else if (isPubKeyOutput(chunks)) {
     return 'pubkey'
-  } else if (isNullDataOutput(script)) {
+  } else if (isNullDataOutput(chunks)) {
     return 'nulldata'
   }
 
@@ -152,15 +274,15 @@ function classifyOutput (script) {
 }
 
 function classifyInput (script, allowIncomplete) {
-  typeforce(types.Script, script)
+  var chunks = decompile(script)
 
-  if (isPubKeyHashInput(script)) {
+  if (isPubKeyHashInput(chunks)) {
     return 'pubkeyhash'
-  } else if (isMultisigInput(script, allowIncomplete)) {
+  } else if (isMultisigInput(chunks, allowIncomplete)) {
     return 'multisig'
-  } else if (isScriptHashInput(script, allowIncomplete)) {
+  } else if (isScriptHashInput(chunks, allowIncomplete)) {
     return 'scripthash'
-  } else if (isPubKeyInput(script)) {
+  } else if (isPubKeyInput(chunks)) {
     return 'pubkey'
   }
 
@@ -170,34 +292,21 @@ function classifyInput (script, allowIncomplete) {
 // Standard Script Templates
 // {pubKey} OP_CHECKSIG
 function pubKeyOutput (pubKey) {
-  return Script.fromChunks([
-    pubKey,
-    ops.OP_CHECKSIG
-  ])
+  return compile([pubKey, OPS.OP_CHECKSIG])
 }
 
 // OP_DUP OP_HASH160 {pubKeyHash} OP_EQUALVERIFY OP_CHECKSIG
-function pubKeyHashOutput (hash) {
-  typeforce(types.Hash160bit, hash)
-
-  return Script.fromChunks([
-    ops.OP_DUP,
-    ops.OP_HASH160,
-    hash,
-    ops.OP_EQUALVERIFY,
-    ops.OP_CHECKSIG
-  ])
+function pubKeyHashOutput (pubKeyHash) {
+  typeforce(types.Hash160bit, pubKeyHash)
+
+  return compile([OPS.OP_DUP, OPS.OP_HASH160, pubKeyHash, OPS.OP_EQUALVERIFY, OPS.OP_CHECKSIG])
 }
 
 // OP_HASH160 {scriptHash} OP_EQUAL
-function scriptHashOutput (hash) {
-  typeforce(types.Hash160bit, hash)
-
-  return Script.fromChunks([
-    ops.OP_HASH160,
-    hash,
-    ops.OP_EQUAL
-  ])
+function scriptHashOutput (scriptHash) {
+  typeforce(types.Hash160bit, scriptHash)
+
+  return compile([OPS.OP_HASH160, scriptHash, OPS.OP_EQUAL])
 }
 
 // m [pubKeys ...] n OP_CHECKMULTISIG
@@ -207,11 +316,11 @@ function multisigOutput (m, pubKeys) {
   var n = pubKeys.length
   if (n < m) throw new Error('Not enough pubKeys provided')
 
-  return Script.fromChunks([].concat(
-    (ops.OP_1 - 1) + m,
+  return compile([].concat(
+    (OPS.OP_1 - 1) + m,
     pubKeys,
-    (ops.OP_1 - 1) + n,
-    ops.OP_CHECKMULTISIG
+    (OPS.OP_1 - 1) + n,
+    OPS.OP_CHECKMULTISIG
   ))
 }
 
@@ -219,46 +328,55 @@ function multisigOutput (m, pubKeys) {
 function pubKeyInput (signature) {
   typeforce(types.Buffer, signature)
 
-  return Script.fromChunks([signature])
+  return compile([signature])
 }
 
 // {signature} {pubKey}
 function pubKeyHashInput (signature, pubKey) {
   typeforce(types.tuple(types.Buffer, types.Buffer), arguments)
 
-  return Script.fromChunks([signature, pubKey])
+  return compile([signature, pubKey])
 }
 
 // <scriptSig> {serialized scriptPubKey script}
 function scriptHashInput (scriptSig, scriptPubKey) {
-  return Script.fromChunks([].concat(
-    scriptSig.chunks,
-    scriptPubKey.toBuffer()
+  var scriptSigChunks = decompile(scriptSig)
+  var serializedScriptPubKey = compile(scriptPubKey)
+
+  return compile([].concat(
+    scriptSigChunks,
+    serializedScriptPubKey
   ))
 }
 
 // OP_0 [signatures ...]
 function multisigInput (signatures, scriptPubKey) {
   if (scriptPubKey) {
-    if (!isMultisigOutput(scriptPubKey)) throw new Error('Expected multisig scriptPubKey')
+    var chunks = decompile(scriptPubKey)
+    if (!isMultisigOutput(chunks)) throw new Error('Expected multisig scriptPubKey')
 
-    var mOp = scriptPubKey.chunks[0]
-    var nOp = scriptPubKey.chunks[scriptPubKey.chunks.length - 2]
-    var m = mOp - (ops.OP_1 - 1)
-    var n = nOp - (ops.OP_1 - 1)
+    var mOp = chunks[0]
+    var nOp = chunks[chunks.length - 2]
+    var m = mOp - (OPS.OP_1 - 1)
+    var n = nOp - (OPS.OP_1 - 1)
 
     if (signatures.length < m) throw new Error('Not enough signatures provided')
     if (signatures.length > n) throw new Error('Too many signatures provided')
   }
 
-  return Script.fromChunks([].concat(ops.OP_0, signatures))
+  return compile([].concat(OPS.OP_0, signatures))
 }
 
 function nullDataOutput (data) {
-  return Script.fromChunks([ops.OP_RETURN, data])
+  return compile([OPS.OP_RETURN, data])
 }
 
 module.exports = {
+  compile: compile,
+  decompile: decompile,
+  fromASM: fromASM,
+  toASM: toASM,
+
   isCanonicalPubKey: isCanonicalPubKey,
   isCanonicalSignature: isCanonicalSignature,
   isPubKeyHashInput: isPubKeyHashInput,
diff --git a/src/transaction.js b/src/transaction.js
index 1267b5e0..4a5bc0f4 100644
--- a/src/transaction.js
+++ b/src/transaction.js
@@ -1,10 +1,9 @@
 var bufferutils = require('./bufferutils')
 var crypto = require('./crypto')
+var opcodes = require('./opcodes')
+var scripts = require('./scripts')
 var typeforce = require('typeforce')
 var types = require('./types')
-var opcodes = require('./opcodes')
-
-var Script = require('./script')
 
 function Transaction () {
   this.version = 1
@@ -45,11 +44,7 @@ Transaction.fromBuffer = function (buffer, __noStrict) {
   }
 
   function readScript () {
-    return Script.fromBuffer(readSlice(readVarInt()))
-  }
-
-  function readGenerationScript () {
-    return new Script(readSlice(readVarInt()), [])
+    return readSlice(readVarInt())
   }
 
   var tx = new Transaction()
@@ -63,7 +58,7 @@ Transaction.fromBuffer = function (buffer, __noStrict) {
       tx.ins.push({
         hash: hash,
         index: readUInt32(),
-        script: readGenerationScript(),
+        script: readScript(),
         sequence: readUInt32()
       })
     } else {
@@ -102,19 +97,21 @@ Transaction.isCoinbaseHash = function (buffer) {
   })
 }
 
+var EMPTY_SCRIPT = new Buffer(0)
+
 Transaction.prototype.addInput = function (hash, index, sequence, script) {
   typeforce(types.tuple(
     types.Hash256bit,
     types.UInt32,
     types.maybe(types.UInt32),
-    types.maybe(types.Script)
+    types.maybe(types.Buffer)
   ), arguments)
 
   if (types.Null(sequence)) {
     sequence = Transaction.DEFAULT_SEQUENCE
   }
 
-  script = script || Script.EMPTY
+  script = script || EMPTY_SCRIPT
 
   // Add the input and return the input's index
   return (this.ins.push({
@@ -126,7 +123,7 @@ Transaction.prototype.addInput = function (hash, index, sequence, script) {
 }
 
 Transaction.prototype.addOutput = function (scriptPubKey, value) {
-  typeforce(types.tuple(types.Script, types.UInt53), arguments)
+  typeforce(types.tuple(types.Buffer, types.UInt53), arguments)
 
   // Add the output and return the output's index
   return (this.outs.push({
@@ -137,7 +134,7 @@ Transaction.prototype.addOutput = function (scriptPubKey, value) {
 
 Transaction.prototype.byteLength = function () {
   function scriptSize (script) {
-    var length = script.buffer.length
+    var length = script.length
 
     return bufferutils.varIntSize(length) + length
   }
@@ -176,6 +173,7 @@ Transaction.prototype.clone = function () {
 }
 
 var ONE = new Buffer('0000000000000000000000000000000000000000000000000000000000000001', 'hex')
+var VALUE_UINT64_MAX = new Buffer('ffffffffffffffff', 'hex')
 
 /**
  * Hash transaction for signing a specific input.
@@ -186,7 +184,7 @@ var ONE = new Buffer('0000000000000000000000000000000000000000000000000000000000
  * This hash can then be used to sign the provided transaction input.
  */
 Transaction.prototype.hashForSignature = function (inIndex, prevOutScript, hashType) {
-  typeforce(types.tuple(types.UInt32, types.Script, /* types.UInt8 */ types.Number), arguments)
+  typeforce(types.tuple(types.UInt32, types.Buffer, /* types.UInt8 */ types.Number), arguments)
 
   // https://github.com/bitcoin/bitcoin/blob/master/src/test/sighash_tests.cpp#L29
   if (inIndex >= this.ins.length) return ONE
@@ -195,11 +193,13 @@ Transaction.prototype.hashForSignature = function (inIndex, prevOutScript, hashT
 
   // in case concatenating two scripts ends up with two codeseparators,
   // or an extra one at the end, this prevents all those possible incompatibilities.
-  var hashScript = prevOutScript.without(opcodes.OP_CODESEPARATOR)
+  var hashScript = scripts.compile(scripts.decompile(prevOutScript).filter(function (x) {
+    return x !== opcodes.OP_CODESEPARATOR
+  }))
   var i
 
   // blank out other inputs' signatures
-  txTmp.ins.forEach(function (input) { input.script = Script.EMPTY })
+  txTmp.ins.forEach(function (input) { input.script = EMPTY_SCRIPT })
   txTmp.ins[inIndex].script = hashScript
 
   // blank out some of the inputs
@@ -225,8 +225,8 @@ Transaction.prototype.hashForSignature = function (inIndex, prevOutScript, hashT
 
     // blank all other outputs (clear scriptPubKey, value === -1)
     var stubOut = {
-      script: Script.EMPTY,
-      valueBuffer: new Buffer('ffffffffffffffff', 'hex')
+      script: EMPTY_SCRIPT,
+      valueBuffer: VALUE_UINT64_MAX
     }
 
     for (i = 0; i < nOut; i++) {
@@ -294,8 +294,8 @@ Transaction.prototype.toBuffer = function () {
   this.ins.forEach(function (txIn) {
     writeSlice(txIn.hash)
     writeUInt32(txIn.index)
-    writeVarInt(txIn.script.buffer.length)
-    writeSlice(txIn.script.buffer)
+    writeVarInt(txIn.script.length)
+    writeSlice(txIn.script)
     writeUInt32(txIn.sequence)
   })
 
@@ -307,8 +307,8 @@ Transaction.prototype.toBuffer = function () {
       writeSlice(txOut.valueBuffer)
     }
 
-    writeVarInt(txOut.script.buffer.length)
-    writeSlice(txOut.script.buffer)
+    writeVarInt(txOut.script.length)
+    writeSlice(txOut.script)
   })
 
   writeUInt32(this.locktime)
@@ -321,7 +321,7 @@ Transaction.prototype.toHex = function () {
 }
 
 Transaction.prototype.setInputScript = function (index, script) {
-  typeforce(types.tuple(types.Number, types.Script), arguments)
+  typeforce(types.tuple(types.Number, types.Buffer), arguments)
 
   this.ins[index].script = script
 }
diff --git a/src/transaction_builder.js b/src/transaction_builder.js
index 421bb9b9..465c6610 100644
--- a/src/transaction_builder.js
+++ b/src/transaction_builder.js
@@ -7,53 +7,62 @@ var scripts = require('./scripts')
 var Address = require('./address')
 var ECPair = require('./ecpair')
 var ECSignature = require('./ecsignature')
-var Script = require('./script')
 var Transaction = require('./transaction')
 
 function extractInput (txIn) {
   var redeemScript
   var scriptSig = txIn.script
+  var scriptSigChunks = scripts.decompile(scriptSig)
+
   var prevOutScript
   var prevOutType = scripts.classifyInput(scriptSig, true)
   var scriptType
 
   // Re-classify if scriptHash
   if (prevOutType === 'scripthash') {
-    redeemScript = Script.fromBuffer(scriptSig.chunks.slice(-1)[0])
-    prevOutScript = scripts.scriptHashOutput(redeemScript.getHash())
+    redeemScript = scriptSigChunks.slice(-1)[0]
+    prevOutScript = scripts.scriptHashOutput(bcrypto.hash160(redeemScript))
+
+    scriptSig = scripts.compile(scriptSigChunks.slice(0, -1))
+    scriptSigChunks = scriptSigChunks.slice(0, -1)
 
-    scriptSig = Script.fromChunks(scriptSig.chunks.slice(0, -1))
     scriptType = scripts.classifyInput(scriptSig, true)
   } else {
     scriptType = prevOutType
   }
 
+  // pre-empt redeemScript decompilation
+  var redeemScriptChunks
+  if (redeemScript) {
+    redeemScriptChunks = scripts.decompile(redeemScript)
+  }
+
   // Extract hashType, pubKeys and signatures
   var hashType, parsed, pubKeys, signatures
 
   switch (scriptType) {
     case 'pubkeyhash':
-      parsed = ECSignature.parseScriptSignature(scriptSig.chunks[0])
+      parsed = ECSignature.parseScriptSignature(scriptSigChunks[0])
       hashType = parsed.hashType
-      pubKeys = scriptSig.chunks.slice(1)
+      pubKeys = scriptSigChunks.slice(1)
       signatures = [parsed.signature]
       prevOutScript = scripts.pubKeyHashOutput(bcrypto.hash160(pubKeys[0]))
 
       break
 
     case 'pubkey':
-      parsed = ECSignature.parseScriptSignature(scriptSig.chunks[0])
+      parsed = ECSignature.parseScriptSignature(scriptSigChunks[0])
       hashType = parsed.hashType
       signatures = [parsed.signature]
 
       if (redeemScript) {
-        pubKeys = redeemScript.chunks.slice(0, 1)
+        pubKeys = redeemScriptChunks.slice(0, 1)
       }
 
       break
 
     case 'multisig':
-      signatures = scriptSig.chunks.slice(1).map(function (chunk) {
+      signatures = scriptSigChunks.slice(1).map(function (chunk) {
         if (chunk === ops.OP_0) return chunk
 
         var parsed = ECSignature.parseScriptSignature(chunk)
@@ -63,7 +72,7 @@ function extractInput (txIn) {
       })
 
       if (redeemScript) {
-        pubKeys = redeemScript.chunks.slice(1, -2)
+        pubKeys = redeemScriptChunks.slice(1, -2)
       }
 
       break
@@ -115,7 +124,7 @@ TransactionBuilder.fromTransaction = function (transaction, network) {
     }
 
     // Ignore empty scripts
-    if (txIn.script.buffer.length === 0) return {}
+    if (txIn.script.length === 0) return {}
 
     return extractInput(txIn)
   })
@@ -138,16 +147,17 @@ TransactionBuilder.prototype.addInput = function (txHash, vout, sequence, prevOu
 
   var input = {}
   if (prevOutScript) {
-    var prevOutType = scripts.classifyOutput(prevOutScript)
+    var prevOutScriptChunks = scripts.decompile(prevOutScript)
+    var prevOutType = scripts.classifyOutput(prevOutScriptChunks)
 
     // if we can, extract pubKey information
     switch (prevOutType) {
       case 'multisig':
-        input.pubKeys = prevOutScript.chunks.slice(1, -2)
+        input.pubKeys = prevOutScriptChunks.slice(1, -2)
         break
 
       case 'pubkey':
-        input.pubKeys = prevOutScript.chunks.slice(0, 1)
+        input.pubKeys = prevOutScriptChunks.slice(0, 1)
         break
     }
 
@@ -295,7 +305,7 @@ TransactionBuilder.prototype.sign = function (index, keyPair, redeemScript, hash
   if (canSign) {
     // if redeemScript was provided, enforce consistency
     if (redeemScript) {
-      if (!input.redeemScript.equals(redeemScript)) throw new Error('Inconsistent redeemScript')
+      if (!bufferutils.equal(input.redeemScript, redeemScript)) throw new Error('Inconsistent redeemScript')
     }
 
     if (input.hashType !== hashType) throw new Error('Inconsistent hashType')
@@ -308,21 +318,22 @@ TransactionBuilder.prototype.sign = function (index, keyPair, redeemScript, hash
       if (input.prevOutScript) {
         if (input.prevOutType !== 'scripthash') throw new Error('PrevOutScript must be P2SH')
 
-        var scriptHash = input.prevOutScript.chunks[1]
-        if (!bufferutils.equal(scriptHash, redeemScript.getHash())) throw new Error('RedeemScript does not match ' + scriptHash.toString('hex'))
+        var scriptHash = scripts.decompile(input.prevOutScript)[1]
+        if (!bufferutils.equal(scriptHash, bcrypto.hash160(redeemScript))) throw new Error('RedeemScript does not match ' + scriptHash.toString('hex'))
       }
 
       var scriptType = scripts.classifyOutput(redeemScript)
       if (!canSignTypes[scriptType]) throw new Error('RedeemScript not supported (' + scriptType + ')')
 
+      var redeemScriptChunks = scripts.decompile(redeemScript)
       var pubKeys = []
       switch (scriptType) {
         case 'multisig':
-          pubKeys = redeemScript.chunks.slice(1, -2)
+          pubKeys = redeemScriptChunks.slice(1, -2)
           break
 
         case 'pubkeyhash':
-          var pkh1 = redeemScript.chunks[2]
+          var pkh1 = redeemScriptChunks[2]
           var pkh2 = bcrypto.hash160(keyPair.getPublicKeyBuffer())
 
           if (!bufferutils.equal(pkh1, pkh2)) throw new Error('privateKey cannot sign for this input')
@@ -330,12 +341,13 @@ TransactionBuilder.prototype.sign = function (index, keyPair, redeemScript, hash
           break
 
         case 'pubkey':
-          pubKeys = redeemScript.chunks.slice(0, 1)
+          pubKeys = redeemScriptChunks.slice(0, 1)
           break
       }
 
+      // if we don't have a prevOutScript, generate a P2SH script
       if (!input.prevOutScript) {
-        input.prevOutScript = scripts.scriptHashOutput(redeemScript.getHash())
+        input.prevOutScript = scripts.scriptHashOutput(bcrypto.hash160(redeemScript))
         input.prevOutType = 'scripthash'
       }
 
diff --git a/src/types.js b/src/types.js
index bd7c149c..a730b2b3 100644
--- a/src/types.js
+++ b/src/types.js
@@ -4,7 +4,7 @@ var typeforce = require('typeforce')
 
 function nBuffer (value, n) {
   if (!Buffer.isBuffer(value)) return false
-  if (value.length !== n) throw new Error('Expected ' + (n * 8) + '-bit Buffer, got ' + (value.length * 8) + '-bit')
+  if (value.length !== n) throw new Error('Expected ' + (n * 8) + '-bit Buffer, got ' + (value.length * 8) + '-bit Buffer')
   return true
 }
 
@@ -42,11 +42,6 @@ var Network = typeforce.compile({
   dustThreshold: UInt53
 })
 
-var Script = typeforce.compile({
-  buffer: typeforce.Buffer,
-  chunks: typeforce.arrayOf(typeforce.oneOf(typeforce.Number, typeforce.Buffer))
-})
-
 // extend typeforce types with ours
 var types = {
   BigInt: BigInt,
@@ -57,7 +52,6 @@ var types = {
   Hash160bit: Hash160bit,
   Hash256bit: Hash256bit,
   Network: Network,
-  Script: Script,
   UInt2: UInt2,
   UInt8: UInt8,
   UInt32: UInt32,


Test patch:
diff --git a/test/address.js b/test/address.js
index 541fb88a..077196ac 100644
--- a/test/address.js
+++ b/test/address.js
@@ -2,9 +2,9 @@
 
 var assert = require('assert')
 var networks = require('../src/networks')
+var scripts = require('../src/scripts')
 
 var Address = require('../src/address')
-var Script = require('../src/script')
 
 var fixtures = require('./fixtures/address.json')
 
@@ -31,7 +31,7 @@ describe('Address', function () {
   describe('fromOutputScript', function () {
     fixtures.valid.forEach(function (f) {
       it('parses ' + f.script.slice(0, 30) + '... (' + f.network + ')', function () {
-        var script = Script.fromASM(f.script)
+        var script = scripts.fromASM(f.script)
         var address = Address.fromOutputScript(script, networks[f.network])
 
         assert.strictEqual(address, f.base58check)
@@ -40,7 +40,7 @@ describe('Address', function () {
 
     fixtures.invalid.fromOutputScript.forEach(function (f) {
       it('throws when ' + f.script.slice(0, 30) + '... ' + f.exception, function () {
-        var script = Script.fromASM(f.script)
+        var script = scripts.fromASM(f.script)
 
         assert.throws(function () {
           Address.fromOutputScript(script)
@@ -66,7 +66,7 @@ describe('Address', function () {
       it('exports ' + f.script.slice(0, 30) + '... (' + f.network + ')', function () {
         var script = Address.toOutputScript(f.base58check, network)
 
-        assert.strictEqual(script.toASM(), f.script)
+        assert.strictEqual(scripts.toASM(script), f.script)
       })
     })
 
diff --git a/test/bitcoin.core.js b/test/bitcoin.core.js
index ff6cbff1..f8466776 100644
--- a/test/bitcoin.core.js
+++ b/test/bitcoin.core.js
@@ -9,10 +9,10 @@ var Block = Bitcoin.Block
 var ECPair = Bitcoin.ECPair
 var ECSignature = Bitcoin.ECSignature
 var Transaction = Bitcoin.Transaction
-var Script = Bitcoin.Script
 
 var bufferutils = Bitcoin.bufferutils
 var networks = Bitcoin.networks
+var scripts = Bitcoin.scripts
 
 var base58_encode_decode = require('./fixtures/core/base58_encode_decode.json')
 var base58_keys_invalid = require('./fixtures/core/base58_keys_invalid.json')
@@ -172,7 +172,7 @@ describe('Bitcoin-core', function () {
     })
   })
 
-  describe('Script.fromASM', function () {
+  describe('scripts.fromASM', function () {
     tx_valid.forEach(function (f) {
       // Objects that are only a single string are ignored
       if (f.length === 1) return
@@ -195,7 +195,7 @@ describe('Bitcoin-core', function () {
 
         it('can parse ' + prevOutScriptPubKey, function () {
           // TODO: we can probably do better validation than this
-          Script.fromASM(prevOutScriptPubKey)
+          scripts.fromASM(prevOutScriptPubKey)
         })
       })
     })
@@ -227,8 +227,9 @@ describe('Bitcoin-core', function () {
         var transaction = Transaction.fromHex(txHex)
         assert.strictEqual(transaction.toHex(), txHex)
 
-        var script = Script.fromHex(scriptHex)
-        assert.strictEqual(script.toHex(), scriptHex)
+        var script = new Buffer(scriptHex, 'hex')
+        var scriptChunks = scripts.decompile(script)
+        assert.strictEqual(scripts.compile(scriptChunks).toString('hex'), scriptHex)
 
         var hash = transaction.hashForSignature(inIndex, script, hashType)
         assert.deepEqual(hash, expectedHash)
diff --git a/test/fixtures/script.json b/test/fixtures/script.json
deleted file mode 100644
index 714976cb..00000000
--- a/test/fixtures/script.json
+++ /dev/null
@@ -1,96 +0,0 @@
-{
-  "valid": [
-    {
-      "asm": "031f1e68f82112b373f0fe980b3a89d212d2b5c01fb51eb25acb8b4c4b4299ce95 OP_CHECKSIG",
-      "description": "pay-to-PubKey",
-      "hash": "26e645ab170255f2a0a82d29e48f35b14ae7c826",
-      "hex": "21031f1e68f82112b373f0fe980b3a89d212d2b5c01fb51eb25acb8b4c4b4299ce95ac",
-      "pubKey": "031f1e68f82112b373f0fe980b3a89d212d2b5c01fb51eb25acb8b4c4b4299ce95"
-    },
-    {
-      "asm": "OP_HASH160 e8c300c87986efa84c37c0519929019ef86eb5b4 OP_EQUAL",
-      "description": "P2SH ScriptPubKey",
-      "hash": "0ba47b56a573bab4b430ad6ed3ec79270e04b066",
-      "hex": "a914e8c300c87986efa84c37c0519929019ef86eb5b487"
-    },
-    {
-      "asm": "OP_DUP OP_HASH160 5a3acbc7bbcc97c5ff16f5909c9d7d3fadb293a8 OP_EQUALVERIFY OP_CHECKSIG",
-      "description": "PubKeyHash ScriptPubKey",
-      "hash": "a5313f33d5c7b81674b35f7f3febc3522ef234db",
-      "hex": "76a9145a3acbc7bbcc97c5ff16f5909c9d7d3fadb293a888ac"
-    },
-    {
-      "asm": "304502206becda98cecf7a545d1a640221438ff8912d9b505ede67e0138485111099f696022100ccd616072501310acba10feb97cecc918e21c8e92760cd35144efec7622938f301 040cd2d2ce17a1e9b2b3b2cb294d40eecf305a25b7e7bfdafae6bb2639f4ee399b3637706c3d377ec4ab781355add443ae864b134c5e523001c442186ea60f0eb8",
-      "description": "pubKeyHash scriptSig",
-      "hash": "b9bac2a5c5c29bb27c382d41fa3d179c646c78fd",
-      "hex": "48304502206becda98cecf7a545d1a640221438ff8912d9b505ede67e0138485111099f696022100ccd616072501310acba10feb97cecc918e21c8e92760cd35144efec7622938f30141040cd2d2ce17a1e9b2b3b2cb294d40eecf305a25b7e7bfdafae6bb2639f4ee399b3637706c3d377ec4ab781355add443ae864b134c5e523001c442186ea60f0eb8"
-    },
-    {
-      "asm": "304502206becda98cecf7a545d1a640221438ff8912d9b505ede67e0138485111099f696022100ccd616072501310acba10feb97cecc918e21c8e92760cd35144efec7622938f301",
-      "description": "pubKey scriptSig",
-      "hash": "44d9982c3e79452e02ef5816976a0e20a0ec1cba",
-      "hex": "48304502206becda98cecf7a545d1a640221438ff8912d9b505ede67e0138485111099f696022100ccd616072501310acba10feb97cecc918e21c8e92760cd35144efec7622938f301",
-      "signature": "304502206becda98cecf7a545d1a640221438ff8912d9b505ede67e0138485111099f696022100ccd616072501310acba10feb97cecc918e21c8e92760cd35144efec7622938f301"
-    },
-    {
-      "asm": "OP_TRUE 032487c2a32f7c8d57d2a93906a6457afd00697925b0e6e145d89af6d3bca33016 02308673d16987eaa010e540901cc6fe3695e758c19f46ce604e174dac315e685a OP_2 OP_CHECKMULTISIG",
-      "description": "Valid multisig script",
-      "hash": "f1c98f0b74ecabcf78ae20dfa224bb6666051fbe",
-      "hex": "5121032487c2a32f7c8d57d2a93906a6457afd00697925b0e6e145d89af6d3bca330162102308673d16987eaa010e540901cc6fe3695e758c19f46ce604e174dac315e685a52ae"
-    },
-    {
-      "asm": "OP_0 304402202b29881db1b4cc128442d955e906d41c77365ed9a8392b584be12d980b236459022009da4bc60d09280aa26f4f981bfbed94eb7263d92920961e48a7f3f0991895b101 3045022100871708a7597c1dbebff2a5527a56a1f2b49d73e35cd825a07285f5f29f5766d8022003bd7ac25334e9a6d6020cc8ba1be67a8c70dca8e7063ea0547d79c45b9bc12601",
-      "description": "mutisig scriptSig",
-      "hash": "b1ef3ae2c77b356eff81049aad7dfd2eeb34c6f5",
-      "hex": "0047304402202b29881db1b4cc128442d955e906d41c77365ed9a8392b584be12d980b236459022009da4bc60d09280aa26f4f981bfbed94eb7263d92920961e48a7f3f0991895b101483045022100871708a7597c1dbebff2a5527a56a1f2b49d73e35cd825a07285f5f29f5766d8022003bd7ac25334e9a6d6020cc8ba1be67a8c70dca8e7063ea0547d79c45b9bc12601"
-    },
-    {
-      "asm": "OP_RETURN 06deadbeef03f895a2ad89fb6d696497af486cb7c644a27aa568c7a18dd06113401115185474",
-      "description": "OP_RETURN script",
-      "hash": "ec88f016655477663455fe6a8e83508c348ea145",
-      "hex": "6a2606deadbeef03f895a2ad89fb6d696497af486cb7c644a27aa568c7a18dd06113401115185474"
-    },
-    {
-      "asm": "OP_HASH256 6fe28c0ab6f1b372c1a6a246ae63f74f931e8365e15a089c68d6190000000000 OP_EQUAL",
-      "description": "Non standard script",
-      "hash": "3823382e70d1930989813d3459988e0d7c2861d8",
-      "hex": "aa206fe28c0ab6f1b372c1a6a246ae63f74f931e8365e15a089c68d619000000000087"
-    },
-    {
-      "asm": "OP_0 OP_0 OP_0 OP_CHECKMULTISIG",
-      "description": "Invalid multisig script",
-      "hash": "62ede8963f9387544935f168745262f703dab1fb",
-      "hex": "000000ae"
-    },
-    {
-      "asm": "",
-      "description": "Not enough data: OP_1",
-      "hash": "c51b66bced5e4491001bd702669770dccf440982",
-      "hex": "01"
-    },
-    {
-      "asm": "",
-      "description": "Not enough data: OP_2",
-      "hash": "d48ce86c698f246829921ba9fb2a844ae2adba67",
-      "hex": "0201"
-    },
-    {
-      "asm": "",
-      "description": "Not enough data: OP_PUSHDATA1 0x02",
-      "hash": "b663ef01a96ff65bec84a3fb14688d6ff7fc617c",
-      "hex": "4c0201"
-    },
-    {
-      "asm": "",
-      "description": "Not enough data: OP_PUSHDATA2 0xffff",
-      "hash": "b4d2fac2836232e59d7b1628f64f24bce3cb4478",
-      "hex": "4dffff01"
-    },
-    {
-      "asm": "",
-      "description": "Not enough data: OP_PUSHDATA4 0xffffffff",
-      "hash": "941db1ca32faf29e1338fb966bb56d98fbce4823",
-      "hex": "4effffffff01"
-    }
-  ]
-}
diff --git a/test/fixtures/scripts.json b/test/fixtures/scripts.json
index 2fcd4230..1a176226 100644
--- a/test/fixtures/scripts.json
+++ b/test/fixtures/scripts.json
@@ -5,14 +5,18 @@
       "pubKey": "02359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1",
       "signature": "304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801",
       "scriptPubKey": "02359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1 OP_CHECKSIG",
-      "scriptSig": "304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801"
+      "scriptSig": "304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801",
+      "scriptSigHex": "47304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801",
+      "scriptPubKeyHex": "2102359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1ac"
     },
     {
       "type": "pubkeyhash",
       "pubKey": "02359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1",
       "signature": "304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801",
       "scriptPubKey": "OP_DUP OP_HASH160 aa4d7985c57e011a8b3dd8e0e5a73aaef41629c5 OP_EQUALVERIFY OP_CHECKSIG",
-      "scriptSig": "304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801 02359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1"
+      "scriptSig": "304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801 02359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1",
+      "scriptSigHex": "47304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca28012102359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1",
+      "scriptPubKeyHex": "76a914aa4d7985c57e011a8b3dd8e0e5a73aaef41629c588ac"
     },
     {
       "type": "multisig",
@@ -25,7 +29,9 @@
         "3045022100ef253c1faa39e65115872519e5f0a33bbecf430c0f35cf562beabbad4da24d8d02201742be8ee49812a73adea3007c9641ce6725c32cd44ddb8e3a3af460015d140501"
       ],
       "scriptPubKey": "OP_2 02359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1 0395a9d84d47d524548f79f435758c01faec5da2b7e551d3b8c995b7e06326ae4a OP_2 OP_CHECKMULTISIG",
-      "scriptSig": "OP_0 304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801 3045022100ef253c1faa39e65115872519e5f0a33bbecf430c0f35cf562beabbad4da24d8d02201742be8ee49812a73adea3007c9641ce6725c32cd44ddb8e3a3af460015d140501"
+      "scriptSig": "OP_0 304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801 3045022100ef253c1faa39e65115872519e5f0a33bbecf430c0f35cf562beabbad4da24d8d02201742be8ee49812a73adea3007c9641ce6725c32cd44ddb8e3a3af460015d140501",
+      "scriptSigHex": "0047304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801483045022100ef253c1faa39e65115872519e5f0a33bbecf430c0f35cf562beabbad4da24d8d02201742be8ee49812a73adea3007c9641ce6725c32cd44ddb8e3a3af460015d140501",
+      "scriptPubKeyHex": "522102359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1210395a9d84d47d524548f79f435758c01faec5da2b7e551d3b8c995b7e06326ae4a52ae"
     },
     {
       "type": "multisig",
@@ -40,19 +46,30 @@
         "3045022100aaeb7204c17eee2f2c4ff1c9f8b39b79e75e7fbf33e92cc67ac51be8f15b75f90220659eee314a4943a6384d2b154fa5821ef7a084814d7ee2c6f9f7f0ffb53be34b01"
       ],
       "scriptPubKey": "OP_3 0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 02b80011a883a0fd621ad46dfc405df1e74bf075cbaf700fd4aebef6e96f848340 024289801366bcee6172b771cf5a7f13aaecd237a0b9a1ff9d769cabc2e6b70a34 OP_3 OP_CHECKMULTISIG",
-      "scriptSig": "OP_0 3045022100fe324541215798b2df68cbd44039615e23c506d4ec1a05572064392a98196b82022068c849fa6699206da2fc6d7848efc1d3804a5816d6293615fe34c1a7f34e1c2f01 3044022001ab168e80b863fdec694350b587339bb72a37108ac3c989849251444d13ebba02201811272023e3c1038478eb972a82d3ad431bfc2408e88e4da990f1a7ecbb263901 3045022100aaeb7204c17eee2f2c4ff1c9f8b39b79e75e7fbf33e92cc67ac51be8f15b75f90220659eee314a4943a6384d2b154fa5821ef7a084814d7ee2c6f9f7f0ffb53be34b01"
+      "scriptSig": "OP_0 3045022100fe324541215798b2df68cbd44039615e23c506d4ec1a05572064392a98196b82022068c849fa6699206da2fc6d7848efc1d3804a5816d6293615fe34c1a7f34e1c2f01 3044022001ab168e80b863fdec694350b587339bb72a37108ac3c989849251444d13ebba02201811272023e3c1038478eb972a82d3ad431bfc2408e88e4da990f1a7ecbb263901 3045022100aaeb7204c17eee2f2c4ff1c9f8b39b79e75e7fbf33e92cc67ac51be8f15b75f90220659eee314a4943a6384d2b154fa5821ef7a084814d7ee2c6f9f7f0ffb53be34b01",
+      "scriptSigHex": "00483045022100fe324541215798b2df68cbd44039615e23c506d4ec1a05572064392a98196b82022068c849fa6699206da2fc6d7848efc1d3804a5816d6293615fe34c1a7f34e1c2f01473044022001ab168e80b863fdec694350b587339bb72a37108ac3c989849251444d13ebba02201811272023e3c1038478eb972a82d3ad431bfc2408e88e4da990f1a7ecbb263901483045022100aaeb7204c17eee2f2c4ff1c9f8b39b79e75e7fbf33e92cc67ac51be8f15b75f90220659eee314a4943a6384d2b154fa5821ef7a084814d7ee2c6f9f7f0ffb53be34b01",
+      "scriptPubKeyHex": "53210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f817982102b80011a883a0fd621ad46dfc405df1e74bf075cbaf700fd4aebef6e96f84834021024289801366bcee6172b771cf5a7f13aaecd237a0b9a1ff9d769cabc2e6b70a3453ae"
     },
     {
       "type": "scripthash",
       "redeemScript": "OP_2 02359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1 0395a9d84d47d524548f79f435758c01faec5da2b7e551d3b8c995b7e06326ae4a OP_2 OP_CHECKMULTISIG",
       "redeemScriptSig": "OP_0 304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801 3045022100ef253c1faa39e65115872519e5f0a33bbecf430c0f35cf562beabbad4da24d8d02201742be8ee49812a73adea3007c9641ce6725c32cd44ddb8e3a3af460015d140501",
       "scriptSig": "OP_0 304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801 3045022100ef253c1faa39e65115872519e5f0a33bbecf430c0f35cf562beabbad4da24d8d02201742be8ee49812a73adea3007c9641ce6725c32cd44ddb8e3a3af460015d140501 522102359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1210395a9d84d47d524548f79f435758c01faec5da2b7e551d3b8c995b7e06326ae4a52ae",
-      "scriptPubKey": "OP_HASH160 722ff0bc2c3f47b35c20df646c395594da24e90e OP_EQUAL"
+      "scriptPubKey": "OP_HASH160 722ff0bc2c3f47b35c20df646c395594da24e90e OP_EQUAL",
+      "scriptSigHex": "0047304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801483045022100ef253c1faa39e65115872519e5f0a33bbecf430c0f35cf562beabbad4da24d8d02201742be8ee49812a73adea3007c9641ce6725c32cd44ddb8e3a3af460015d14050147522102359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1210395a9d84d47d524548f79f435758c01faec5da2b7e551d3b8c995b7e06326ae4a52ae",
+      "scriptPubKeyHex": "a914722ff0bc2c3f47b35c20df646c395594da24e90e87"
+    },
+    {
+      "type": "nulldata",
+      "data": "06deadbeef03f895a2ad89fb6d696497af486cb7c644a27aa568c7a18dd06113401115185474",
+      "scriptPubKey": "OP_RETURN 06deadbeef03f895a2ad89fb6d696497af486cb7c644a27aa568c7a18dd06113401115185474",
+      "scriptPubKeyHex": "6a2606deadbeef03f895a2ad89fb6d696497af486cb7c644a27aa568c7a18dd06113401115185474"
     },
     {
       "type": "nulldata",
       "data": "deadffffffffffffffffffffffffffffffffbeef",
-      "scriptPubKey": "OP_RETURN deadffffffffffffffffffffffffffffffffbeef"
+      "scriptPubKey": "OP_RETURN deadffffffffffffffffffffffffffffffffbeef",
+      "scriptPubKeyHex": "6a14deadffffffffffffffffffffffffffffffffbeef"
     },
     {
       "type": "nonstandard",
@@ -67,7 +84,8 @@
         "3044022001ab168e80b863fdec694350b587339bb72a37108ac3c989849251444d13ebba02201811272023e3c1038478eb972a82d3ad431bfc2408e88e4da990f1a7ecbb263901",
         "3045022100aaeb7204c17eee2f2c4ff1c9f8b39b79e75e7fbf33e92cc67ac51be8f15b75f90220659eee314a4943a6384d2b154fa5821ef7a084814d7ee2c6f9f7f0ffb53be34b01"
       ],
-      "scriptSig": "OP_0 OP_0 3044022001ab168e80b863fdec694350b587339bb72a37108ac3c989849251444d13ebba02201811272023e3c1038478eb972a82d3ad431bfc2408e88e4da990f1a7ecbb263901 3045022100aaeb7204c17eee2f2c4ff1c9f8b39b79e75e7fbf33e92cc67ac51be8f15b75f90220659eee314a4943a6384d2b154fa5821ef7a084814d7ee2c6f9f7f0ffb53be34b01"
+      "scriptSig": "OP_0 OP_0 3044022001ab168e80b863fdec694350b587339bb72a37108ac3c989849251444d13ebba02201811272023e3c1038478eb972a82d3ad431bfc2408e88e4da990f1a7ecbb263901 3045022100aaeb7204c17eee2f2c4ff1c9f8b39b79e75e7fbf33e92cc67ac51be8f15b75f90220659eee314a4943a6384d2b154fa5821ef7a084814d7ee2c6f9f7f0ffb53be34b01",
+      "scriptSigHex": "0000473044022001ab168e80b863fdec694350b587339bb72a37108ac3c989849251444d13ebba02201811272023e3c1038478eb972a82d3ad431bfc2408e88e4da990f1a7ecbb263901483045022100aaeb7204c17eee2f2c4ff1c9f8b39b79e75e7fbf33e92cc67ac51be8f15b75f90220659eee314a4943a6384d2b154fa5821ef7a084814d7ee2c6f9f7f0ffb53be34b01"
     },
     {
       "type": "nonstandard",
@@ -82,7 +100,8 @@
         null,
         null
       ],
-      "scriptSig": "OP_0 OP_0 OP_0 OP_0"
+      "scriptSig": "OP_0 OP_0 OP_0 OP_0",
+      "scriptSigHex": "00000000"
     },
     {
       "type": "nonstandard",
@@ -97,16 +116,50 @@
       ],
       "redeemScript": "OP_2 0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 04c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee51ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a OP_2 OP_CHECKMULTISIG",
       "redeemScriptSig": "OP_0 OP_0 30450221009c92c1ae1767ac04e424da7f6db045d979b08cde86b1ddba48621d59a109d818022004f5bb21ad72255177270abaeb2d7940ac18f1e5ca1f53db4f3fd1045647a8a801",
-      "scriptSig": "OP_0 OP_0 30450221009c92c1ae1767ac04e424da7f6db045d979b08cde86b1ddba48621d59a109d818022004f5bb21ad72255177270abaeb2d7940ac18f1e5ca1f53db4f3fd1045647a8a801 52410479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b84104c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee51ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a52ae"
+      "scriptSig": "OP_0 OP_0 30450221009c92c1ae1767ac04e424da7f6db045d979b08cde86b1ddba48621d59a109d818022004f5bb21ad72255177270abaeb2d7940ac18f1e5ca1f53db4f3fd1045647a8a801 52410479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b84104c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee51ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a52ae",
+      "scriptSigHex": "00004830450221009c92c1ae1767ac04e424da7f6db045d979b08cde86b1ddba48621d59a109d818022004f5bb21ad72255177270abaeb2d7940ac18f1e5ca1f53db4f3fd1045647a8a8014c8752410479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b84104c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee51ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a52ae"
+    },
+    {
+      "type": "nonstandard",
+      "scriptPubKey": "OP_HASH256 6fe28c0ab6f1b372c1a6a246ae63f74f931e8365e15a089c68d6190000000000 OP_EQUAL",
+      "scriptPubKeyHex": "aa206fe28c0ab6f1b372c1a6a246ae63f74f931e8365e15a089c68d619000000000087"
+    },
+    {
+      "type": "nonstandard",
+      "scriptPubKey": "OP_0 OP_0 OP_0 OP_CHECKMULTISIG",
+      "scriptPubKeyHex": "000000ae"
     },
     {
       "type": "scripthash",
       "redeemScript": "OP_0",
       "redeemScriptSig": "OP_0",
+      "scriptSig": "OP_0 00",
       "scriptSigHex": "000100"
     }
   ],
   "invalid": {
+    "decompile": [
+      {
+        "description": "Not enough data: OP_1",
+        "hex": "01"
+      },
+      {
+        "description": "Not enough data: OP_2",
+        "hex": "0201"
+      },
+      {
+        "description": "Not enough data: OP_PUSHDATA1 0x02",
+        "hex": "4c0201"
+      },
+      {
+        "description": "Not enough data: OP_PUSHDATA2 0xffff",
+        "hex": "4dffff01"
+      },
+      {
+        "description": "Not enough data: OP_PUSHDATA4 0xffffffff",
+        "hex": "4effffffff01"
+      }
+    ],
     "isPubKeyHashInput": [
       {
         "description": "pubKeyHash input : extraneous data",
@@ -212,6 +265,18 @@
           "304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801"
         ]
       }
+    ],
+    "pubKeyHashOutput": [
+      {
+        "exception": "Expected 160-bit Buffer, got 16-bit Buffer",
+        "hash": "ffff"
+      }
+    ],
+    "scriptHashOutput": [
+      {
+        "exception": "Expected 160-bit Buffer, got 24-bit Buffer",
+        "hash": "ffffff"
+      }
     ]
   }
 }
diff --git a/test/fixtures/transaction.json b/test/fixtures/transaction.json
index a47cf3a1..8fb1a942 100644
--- a/test/fixtures/transaction.json
+++ b/test/fixtures/transaction.json
@@ -229,12 +229,12 @@
   "invalid": {
     "addInput": [
       {
-        "exception": "Expected 256-bit Buffer, got 240-bit",
+        "exception": "Expected 256-bit Buffer, got 240-bit Buffer",
         "hash": "0aed1366a73b6057ee7800d737bff1bdf8c448e98d86bc0998f2b009816d",
         "index": 0
       },
       {
-        "exception": "Expected 256-bit Buffer, got 272-bit",
+        "exception": "Expected 256-bit Buffer, got 272-bit Buffer",
         "hash": "0aed1366a73b6057ee7800d737bff1bdf8c448e98d86bc0998f2b009816da9b0ffff",
         "index": 0
       }
diff --git a/test/integration/advanced.js b/test/integration/advanced.js
index 366c4f39..030bd386 100644
--- a/test/integration/advanced.js
+++ b/test/integration/advanced.js
@@ -55,7 +55,7 @@ describe('bitcoinjs-lib (advanced)', function () {
 
             var actual = bitcoin.Transaction.fromHex(transaction.txHex)
             var dataScript2 = actual.outs[0].script
-            var data2 = dataScript2.chunks[1]
+            var data2 = bitcoin.scripts.decompile(dataScript2)[1]
 
             assert.deepEqual(dataScript, dataScript2)
             assert.deepEqual(data, data2)
diff --git a/test/integration/crypto.js b/test/integration/crypto.js
index 9f3e0c84..f4b4c880 100644
--- a/test/integration/crypto.js
+++ b/test/integration/crypto.js
@@ -9,42 +9,35 @@ var crypto = require('crypto')
 
 describe('bitcoinjs-lib (crypto)', function () {
   it('can generate a single-key stealth address', function () {
+    var receiver = bitcoin.ECPair.fromWIF('5KYZdUEo39z3FPrtuX2QbbwGnNP5zTd7yyr2SC1j299sBCnWjss')
+
+    // XXX: ephemeral, must be random (and secret to sender) to preserve privacy
+    var sender = bitcoin.ECPair.fromWIF('Kxr9tQED9H44gCmp6HAdmemAzU3n84H3dGkuWTKvE23JgHMW8gct')
+
     var G = bitcoin.ECPair.curve.G
-    var n = bitcoin.ECPair.curve.n
-
-    function stealthSend (Q, nonce) {
-      var noncePair = new bitcoin.ECPair(bigi.fromBuffer(nonce))
-      var e = noncePair.d
-      var eQ = Q.multiply(e)
-      var c = bigi.fromBuffer(bitcoin.crypto.sha256(eQ.getEncoded()))
-      var cG = G.multiply(c)
-      var Qprime = Q.add(cG)
-
-      return {
-        address: new bitcoin.ECPair(null, Qprime).getAddress(),
-        nonceQ: noncePair.Q
-      }
-    }
+    var d = receiver.d // secret (receiver only)
+    var Q = receiver.Q // shared
 
-    function stealthReceive (d, P) {
-      var dP = P.multiply(d)
-      var c = bigi.fromBuffer(bitcoin.crypto.sha256(dP.getEncoded()))
-      var derived = new bitcoin.ECPair(d.add(c).mod(n))
+    var e = sender.d // secret (sender only)
+    var P = sender.Q // shared
 
-      return {
-        keyPair: derived
-      }
-    }
+    // derived shared secret
+    var eQ = Q.multiply(e) // sender
+    var dP = P.multiply(d) // receiver
+    assert.deepEqual(eQ.getEncoded(), dP.getEncoded())
 
-    // receiver private key
-    var receiver = bitcoin.ECPair.fromWIF('5KYZdUEo39z3FPrtuX2QbbwGnNP5zTd7yyr2SC1j299sBCnWjss')
-    var nonce = crypto.randomBytes(32)
+    var c = bigi.fromBuffer(bitcoin.crypto.sha256(eQ.getEncoded()))
+    var cG = G.multiply(c)
 
-    var stealthS = stealthSend(receiver.Q, nonce)
-    var stealthR = stealthReceive(receiver.d, stealthS.nonceQ)
+    // derived public key
+    var QprimeS = Q.add(cG)
+    var QprimeR = G.multiply(d.add(c))
+    assert.deepEqual(QprimeR.getEncoded(), QprimeS.getEncoded())
 
-    // and check that we derived both sides correctly
-    assert.equal(stealthS.address, stealthR.keyPair.getAddress())
+    // derived shared-secret address
+    var address = new bitcoin.ECPair(null, QprimeS).getAddress()
+
+    assert.strictEqual(address, '1EwCNJNZM5q58YPPTnjR1H5BvYRNeyZi47')
   })
 
   // TODO
@@ -128,7 +121,9 @@ describe('bitcoinjs-lib (crypto)', function () {
       inputs.forEach(function (input) {
         var transaction = transactions[input.txId]
         var script = transaction.ins[input.vout].script
-        assert(bitcoin.scripts.isPubKeyHashInput(script), 'Expected pubKeyHash script')
+        var scriptChunks = bitcoin.scripts.decompile(script)
+
+        assert(bitcoin.scripts.isPubKeyHashInput(scriptChunks), 'Expected pubKeyHash script')
 
         var prevOutTxId = bitcoin.bufferutils.reverse(transaction.ins[input.vout].hash).toString('hex')
         var prevVout = transaction.ins[input.vout].index
@@ -140,8 +135,8 @@ describe('bitcoinjs-lib (crypto)', function () {
             var prevOut = bitcoin.Transaction.fromHex(result.txHex)
             var prevOutScript = prevOut.outs[prevVout].script
 
-            var scriptSignature = bitcoin.ECSignature.parseScriptSignature(script.chunks[0])
-            var publicKey = bitcoin.ECPair.fromPublicKeyBuffer(script.chunks[1])
+            var scriptSignature = bitcoin.ECSignature.parseScriptSignature(scriptChunks[0])
+            var publicKey = bitcoin.ECPair.fromPublicKeyBuffer(scriptChunks[1])
 
             var m = transaction.hashForSignature(input.vout, prevOutScript, scriptSignature.hashType)
             assert(publicKey.verify(m, scriptSignature.signature), 'Invalid m')
diff --git a/test/integration/multisig.js b/test/integration/multisig.js
index 28a2d938..cae7a478 100644
--- a/test/integration/multisig.js
+++ b/test/integration/multisig.js
@@ -15,7 +15,7 @@ describe('bitcoinjs-lib (multisig)', function () {
     })
 
     var redeemScript = bitcoin.scripts.multisigOutput(2, pubKeys) // 2 of 3
-    var scriptPubKey = bitcoin.scripts.scriptHashOutput(redeemScript.getHash())
+    var scriptPubKey = bitcoin.scripts.scriptHashOutput(bitcoin.crypto.hash160(redeemScript))
     var address = bitcoin.Address.fromOutputScript(scriptPubKey)
 
     assert.strictEqual(address, '36NUkt6FWUi3LAWBqWRdDmdTWbt91Yvfu7')
@@ -33,7 +33,7 @@ describe('bitcoinjs-lib (multisig)', function () {
     var pubKeys = keyPairs.map(function (x) { return x.getPublicKeyBuffer() })
 
     var redeemScript = bitcoin.scripts.multisigOutput(2, pubKeys) // 2 of 4
-    var scriptPubKey = bitcoin.scripts.scriptHashOutput(redeemScript.getHash())
+    var scriptPubKey = bitcoin.scripts.scriptHashOutput(bitcoin.crypto.hash160(redeemScript))
     var address = bitcoin.Address.fromOutputScript(scriptPubKey, bitcoin.networks.testnet)
 
     // attempt to send funds to the source address
diff --git a/test/script.js b/test/script.js
deleted file mode 100644
index 4ce400e8..00000000
--- a/test/script.js
+++ /dev/null
@@ -1,95 +0,0 @@
-/* global describe, it */
-/* eslint-disable no-new */
-
-var assert = require('assert')
-var opcodes = require('../src/opcodes')
-
-var Script = require('../src/script')
-
-var fixtures = require('./fixtures/script.json')
-
-describe('Script', function () {
-  describe('constructor', function () {
-    it('accepts valid parameters', function () {
-      var buffer = new Buffer([1])
-      var chunks = [1]
-      var script = new Script(buffer, chunks)
-
-      assert.strictEqual(script.buffer, buffer)
-      assert.strictEqual(script.chunks, chunks)
-    })
-
-    it('throws an error when input is not an array', function () {
-      assert.throws(function () {
-        new Script({})
-      }, /Expected Buffer, got/)
-    })
-  })
-
-  describe('fromASM/toASM', function () {
-    fixtures.valid.forEach(function (f) {
-      if (!f.asm) return
-
-      it('decodes/encodes ' + f.description, function () {
-        var script = Script.fromASM(f.asm)
-
-        assert.strictEqual(script.toASM(), f.asm)
-        assert.strictEqual(script.toHex(), f.hex)
-      })
-    })
-  })
-
-  describe('fromHex/toHex', function () {
-    fixtures.valid.forEach(function (f) {
-      it('decodes/encodes ' + f.description, function () {
-        var script = Script.fromHex(f.hex)
-
-        assert.strictEqual(script.toASM(), f.asm)
-        assert.strictEqual(script.toHex(), f.hex)
-      })
-    })
-  })
-
-  describe('getHash', function () {
-    fixtures.valid.forEach(function (f) {
-      it('produces a HASH160 of ' + f.description, function () {
-        var script = Script.fromHex(f.hex)
-
-        assert.strictEqual(script.getHash().toString('hex'), f.hash)
-      })
-    })
-  })
-
-  describe('fromChunks', function () {
-    it('should match expected behaviour', function () {
-      var hash = new Buffer(32)
-      hash.fill(0)
-
-      var script = Script.fromChunks([
-        opcodes.OP_HASH160,
-        hash,
-        opcodes.OP_EQUAL
-      ])
-
-      assert.strictEqual(script.toHex(), 'a920000000000000000000000000000000000000000000000000000000000000000087')
-    })
-  })
-
-  describe('without', function () {
-    var hex = 'a914e8c300c87986efa94c37c0519929019ef86eb5b487'
-    var script = Script.fromHex(hex)
-
-    it('should return a script without the given value', function () {
-      var subScript = script.without(opcodes.OP_HASH160)
-
-      assert.strictEqual(subScript.toHex(), '14e8c300c87986efa94c37c0519929019ef86eb5b487')
-    })
-
-    it('shouldnt mutate the original script', function () {
-      var subScript = script.without(opcodes.OP_EQUAL)
-
-      assert.notEqual(subScript.toHex(), hex)
-      assert.strictEqual(script.toHex(), hex)
-    })
-  })
-})
diff --git a/test/scripts.js b/test/scripts.js
index f89c44a0..73b9f0dc 100644
--- a/test/scripts.js
+++ b/test/scripts.js
@@ -5,21 +5,87 @@ var bcrypto = require('../src/crypto')
 var ops = require('../src/opcodes')
 var scripts = require('../src/scripts')
 
-var Script = require('../src/script')
-
 var fixtures = require('./fixtures/scripts.json')
 
-describe('Scripts', function () {
+describe('scripts', function () {
   // TODO
   describe.skip('isCanonicalPubKey', function () {})
   describe.skip('isCanonicalSignature', function () {})
 
+  describe('fromASM/toASM', function () {
+    fixtures.valid.forEach(function (f) {
+      if (f.scriptSig) {
+        it('encodes/decodes ' + f.scriptSig, function () {
+          var script = scripts.fromASM(f.scriptSig)
+
+          assert.strictEqual(scripts.toASM(script), f.scriptSig)
+        })
+      }
+
+      if (f.scriptPubKey) {
+        it('encodes/decodes ' + f.scriptPubKey, function () {
+          var script = scripts.fromASM(f.scriptPubKey)
+
+          assert.strictEqual(scripts.toASM(script), f.scriptPubKey)
+        })
+      }
+    })
+  })
+
+  describe('compile', function () {
+    fixtures.valid.forEach(function (f) {
+      if (f.scriptSig) {
+        it('compiles ' + f.scriptSig, function () {
+          var script = scripts.fromASM(f.scriptSig)
+
+          assert.strictEqual(scripts.compile(script).toString('hex'), f.scriptSigHex)
+        })
+      }
+
+      if (f.scriptPubKey) {
+        it('compiles ' + f.scriptPubKey, function () {
+          var script = scripts.fromASM(f.scriptPubKey)
+
+          assert.strictEqual(scripts.compile(script).toString('hex'), f.scriptPubKeyHex)
+        })
+      }
+    })
+  })
+
+  describe('decompile', function () {
+    fixtures.valid.forEach(function (f) {
+      if (f.scriptSigHex) {
+        it('decompiles ' + f.scriptSig, function () {
+          var chunks = scripts.decompile(new Buffer(f.scriptSigHex, 'hex'))
+
+          assert.strictEqual(scripts.toASM(chunks), f.scriptSig)
+        })
+      }
+
+      if (f.scriptPubKeyHex) {
+        it('decompiles ' + f.scriptPubKey, function () {
+          var chunks = scripts.decompile(new Buffer(f.scriptPubKeyHex, 'hex'))
+
+          assert.strictEqual(scripts.toASM(chunks), f.scriptPubKey)
+        })
+      }
+    })
+
+    fixtures.invalid.decompile.forEach(function (f) {
+      it('decompiles ' + f.hex + ' to [] because of "' + f.description + '"', function () {
+        var chunks = scripts.decompile(new Buffer(f.hex, 'hex'))
+
+        assert.strictEqual(chunks.length, 0)
+      })
+    })
+  })
+
   describe('classifyInput', function () {
     fixtures.valid.forEach(function (f) {
       if (!f.scriptSig) return
 
       it('classifies ' + f.scriptSig + ' as ' + f.type, function () {
-        var script = Script.fromASM(f.scriptSig)
+        var script = scripts.fromASM(f.scriptSig)
         var type = scripts.classifyInput(script)
 
         assert.strictEqual(type, f.type)
@@ -31,7 +97,7 @@ describe('Scripts', function () {
       if (!f.typeIncomplete) return
 
       it('classifies incomplete ' + f.scriptSig + ' as ' + f.typeIncomplete, function () {
-        var script = Script.fromASM(f.scriptSig)
+        var script = scripts.fromASM(f.scriptSig)
         var type = scripts.classifyInput(script, true)
 
         assert.strictEqual(type, f.typeIncomplete)
@@ -44,7 +110,7 @@ describe('Scripts', function () {
       if (!f.scriptPubKey) return
 
       it('classifies ' + f.scriptPubKey + ' as ' + f.type, function () {
-        var script = Script.fromASM(f.scriptPubKey)
+        var script = scripts.fromASM(f.scriptPubKey)
         var type = scripts.classifyOutput(script)
 
         assert.strictEqual(type, f.type)
@@ -64,13 +130,7 @@ describe('Scripts', function () {
         var expected = type.toLowerCase() === f.type
 
         if (inputFn && f.scriptSig) {
-          var script
-
-          if (f.scriptSig) {
-            script = Script.fromASM(f.scriptSig)
-          } else {
-            script = Script.fromHex(f.scriptSigHex)
-          }
+          var script = scripts.fromASM(f.scriptSig)
 
           it('returns ' + expected + ' for ' + f.scriptSig, function () {
             assert.strictEqual(inputFn(script), expected)
@@ -94,9 +154,9 @@ describe('Scripts', function () {
             var script
 
             if (f.scriptSig) {
-              script = Script.fromASM(f.scriptSig)
+              script = scripts.fromASM(f.scriptSig)
             } else {
-              script = Script.fromHex(f.scriptSigHex)
+              script = scripts.fromHex(f.scriptSigHex)
             }
 
             assert.strictEqual(inputFn(script), false)
@@ -111,7 +171,7 @@ describe('Scripts', function () {
 
         if (outputFn && f.scriptPubKey) {
           it('returns ' + expected + ' for ' + f.scriptPubKey, function () {
-            var script = Script.fromASM(f.scriptPubKey)
+            var script = scripts.fromASM(f.scriptPubKey)
 
             assert.strictEqual(outputFn(script), expected)
           })
@@ -123,7 +183,7 @@ describe('Scripts', function () {
       fixtures.invalid[outputFnName].forEach(function (f) {
         if (outputFn && f.scriptPubKey) {
           it('returns false for ' + f.description + ' (' + f.scriptPubKey + ')', function () {
-            var script = Script.fromASM(f.scriptPubKey)
+            var script = scripts.fromASM(f.scriptPubKey)
 
             assert.strictEqual(outputFn(script), false)
           })
@@ -140,7 +200,7 @@ describe('Scripts', function () {
         var signature = new Buffer(f.signature, 'hex')
 
         var scriptSig = scripts.pubKeyInput(signature)
-        assert.strictEqual(scriptSig.toASM(), f.scriptSig)
+        assert.strictEqual(scripts.toASM(scriptSig), f.scriptSig)
       })
     })
   })
@@ -152,7 +212,8 @@ describe('Scripts', function () {
       it('returns ' + f.scriptPubKey, function () {
         var pubKey = new Buffer(f.pubKey, 'hex')
         var scriptPubKey = scripts.pubKeyOutput(pubKey)
-        assert.strictEqual(scriptPubKey.toASM(), f.scriptPubKey)
+
+        assert.strictEqual(scripts.toASM(scriptPubKey), f.scriptPubKey)
       })
     })
   })
@@ -167,7 +228,7 @@ describe('Scripts', function () {
         var signature = new Buffer(f.signature, 'hex')
 
         var scriptSig = scripts.pubKeyHashInput(signature, pubKey)
-        assert.strictEqual(scriptSig.toASM(), f.scriptSig)
+        assert.strictEqual(scripts.toASM(scriptSig), f.scriptSig)
       })
     })
   })
@@ -181,7 +242,17 @@ describe('Scripts', function () {
 
       it('returns ' + f.scriptPubKey, function () {
         var scriptPubKey = scripts.pubKeyHashOutput(pubKeyHash)
-        assert.strictEqual(scriptPubKey.toASM(), f.scriptPubKey)
+        assert.strictEqual(scripts.toASM(scriptPubKey), f.scriptPubKey)
+      })
+    })
+
+    fixtures.invalid.pubKeyHashOutput.forEach(function (f) {
+      var hash = new Buffer(f.hash, 'hex')
+
+      it('throws on ' + f.exception, function () {
+        assert.throws(function () {
+          scripts.pubKeyHashOutput(hash)
+        }, new RegExp(f.exception))
       })
     })
   })
@@ -196,12 +267,12 @@ describe('Scripts', function () {
         })
 
         var scriptSig = scripts.multisigInput(signatures)
-        assert.strictEqual(scriptSig.toASM(), f.scriptSig)
+        assert.strictEqual(scripts.toASM(scriptSig), f.scriptSig)
       })
     })
 
     fixtures.invalid.multisigInput.forEach(function (f) {
-      var scriptPubKey = Script.fromASM(f.scriptPubKey)
+      var scriptPubKey = scripts.fromASM(f.scriptPubKey)
 
       it('throws on ' + f.exception, function () {
         var signatures = f.signatures.map(function (signature) {
@@ -223,7 +294,7 @@ describe('Scripts', function () {
       var scriptPubKey = scripts.multisigOutput(pubKeys.length, pubKeys)
 
       it('returns ' + f.scriptPubKey, function () {
-        assert.strictEqual(scriptPubKey.toASM(), f.scriptPubKey)
+        assert.strictEqual(scripts.toASM(scriptPubKey), f.scriptPubKey)
       })
     })
 
@@ -244,16 +315,17 @@ describe('Scripts', function () {
     fixtures.valid.forEach(function (f) {
       if (f.type !== 'scripthash') return
 
-      var redeemScript = Script.fromASM(f.redeemScript)
-      var redeemScriptSig = Script.fromASM(f.redeemScriptSig)
+      var redeemScript = scripts.fromASM(f.redeemScript)
+      var redeemScriptSig = scripts.fromASM(f.redeemScriptSig)
 
       it('returns ' + f.scriptSig, function () {
         var scriptSig = scripts.scriptHashInput(redeemScriptSig, redeemScript)
 
         if (f.scriptSig) {
-          assert.strictEqual(scriptSig.toASM(), f.scriptSig)
+          assert.strictEqual(scripts.toASM(scriptSig), f.scriptSig)
+
         } else {
-          assert.strictEqual(scriptSig.toHex(), f.scriptSigHex)
+          assert.strictEqual(scriptSig.toString('hex'), f.scriptSigHex)
         }
       })
     })
@@ -265,10 +337,20 @@ describe('Scripts', function () {
       if (!f.scriptPubKey) return
 
       it('returns ' + f.scriptPubKey, function () {
-        var redeemScript = Script.fromASM(f.redeemScript)
-        var scriptPubKey = scripts.scriptHashOutput(redeemScript.getHash())
+        var redeemScript = scripts.fromASM(f.redeemScript)
+        var scriptPubKey = scripts.scriptHashOutput(bcrypto.hash160(redeemScript))
+
+        assert.strictEqual(scripts.toASM(scriptPubKey), f.scriptPubKey)
+      })
+    })
+
+    fixtures.invalid.scriptHashOutput.forEach(function (f) {
+      var hash = new Buffer(f.hash, 'hex')
 
-        assert.strictEqual(scriptPubKey.toASM(), f.scriptPubKey)
+      it('throws on ' + f.exception, function () {
+        assert.throws(function () {
+          scripts.scriptHashOutput(hash)
+        }, new RegExp(f.exception))
       })
     })
   })
@@ -281,7 +363,7 @@ describe('Scripts', function () {
       var scriptPubKey = scripts.nullDataOutput(data)
 
       it('returns ' + f.scriptPubKey, function () {
-        assert.strictEqual(scriptPubKey.toASM(), f.scriptPubKey)
+        assert.strictEqual(scripts.toASM(scriptPubKey), f.scriptPubKey)
       })
     })
   })
diff --git a/test/transaction.js b/test/transaction.js
index 0cd376b3..f5effe6b 100644
--- a/test/transaction.js
+++ b/test/transaction.js
@@ -1,9 +1,9 @@
 /* global describe, it, beforeEach */
 
 var assert = require('assert')
+var scripts = require('../src/scripts')
 
 var Transaction = require('../src/transaction')
-var Script = require('../src/script')
 
 var fixtures = require('./fixtures/transaction')
 
@@ -19,9 +19,10 @@ describe('Transaction', function () {
 
       if (txIn.data) {
         var data = new Buffer(txIn.data, 'hex')
-        script = new Script(data, [])
+        script = data
+
       } else if (txIn.script) {
-        script = Script.fromASM(txIn.script)
+        script = scripts.fromASM(txIn.script)
       }
 
       tx.addInput(txHash, txIn.index, txIn.sequence, script)
@@ -32,9 +33,10 @@ describe('Transaction', function () {
 
       if (txOut.data) {
         var data = new Buffer(txOut.data, 'hex')
-        script = new Script(data, [])
+        script = data
+
       } else if (txOut.script) {
-        script = Script.fromASM(txOut.script)
+        script = scripts.fromASM(txOut.script)
       }
 
       tx.addOutput(script, txOut.value)
@@ -102,7 +104,7 @@ describe('Transaction', function () {
       var tx = new Transaction()
       tx.addInput(prevTxHash, 0)
 
-      assert.strictEqual(tx.ins[0].script, Script.EMPTY)
+      assert.strictEqual(tx.ins[0].script.length, 0)
     })
 
     fixtures.invalid.addInput.forEach(function (f) {
@@ -120,8 +122,8 @@ describe('Transaction', function () {
   describe('addOutput', function () {
     it('returns an index', function () {
       var tx = new Transaction()
-      assert.strictEqual(tx.addOutput(Script.EMPTY, 0), 0)
-      assert.strictEqual(tx.addOutput(Script.EMPTY, 0), 1)
+      assert.strictEqual(tx.addOutput(new Buffer(0), 0), 0)
+      assert.strictEqual(tx.addOutput(new Buffer(0), 0), 1)
     })
   })
 
diff --git a/test/transaction_builder.js b/test/transaction_builder.js
index 3bfacd55..2cdbd519 100644
--- a/test/transaction_builder.js
+++ b/test/transaction_builder.js
@@ -7,7 +7,6 @@ var scripts = require('../src/scripts')
 var Address = require('../src/address')
 var BigInteger = require('bigi')
 var ECPair = require('../src/ecpair')
-var Script = require('../src/script')
 var Transaction = require('../src/transaction')
 var TransactionBuilder = require('../src/transaction_builder')
 var NETWORKS = require('../src/networks')
@@ -22,14 +21,14 @@ function construct (f, sign) {
     var prevTxScript
 
     if (input.prevTxScript) {
-      prevTxScript = Script.fromASM(input.prevTxScript)
+      prevTxScript = scripts.fromASM(input.prevTxScript)
     }
 
     txb.addInput(input.txId, input.vout, input.sequence, prevTxScript)
   })
 
   f.outputs.forEach(function (output) {
-    var script = Script.fromASM(output.script)
+    var script = scripts.fromASM(output.script)
 
     txb.addOutput(script, output.value)
   })
@@ -41,7 +40,7 @@ function construct (f, sign) {
         var redeemScript
 
         if (sign.redeemScript) {
-          redeemScript = Script.fromASM(sign.redeemScript)
+          redeemScript = scripts.fromASM(sign.redeemScript)
         }
 
         txb.sign(index, keyPair, redeemScript, sign.hashType)
@@ -200,7 +199,7 @@ describe('TransactionBuilder', function () {
             var redeemScript
 
             if (sign.redeemScript) {
-              redeemScript = Script.fromASM(sign.redeemScript)
+              redeemScript = scripts.fromASM(sign.redeemScript)
             }
 
             if (!sign.throws) {
@@ -262,7 +261,7 @@ describe('TransactionBuilder', function () {
         var network = NETWORKS[f.network]
 
         f.inputs.forEach(function (input, i) {
-          var redeemScript = Script.fromASM(input.redeemScript)
+          var redeemScript = scripts.fromASM(input.redeemScript)
 
           input.signs.forEach(function (sign) {
             // rebuild the transaction each-time after the first
@@ -272,11 +271,11 @@ describe('TransactionBuilder', function () {
                 var scriptSig = tx.ins[i].script
 
                 // ignore OP_0 on the front, ignore redeemScript
-                var signatures = scriptSig.chunks.slice(1, -1).filter(function (x) { return x !== ops.OP_0 })
+                var signatures = scripts.decompile(scriptSig).slice(1, -1).filter(function (x) { return x !== ops.OP_0 })
 
                 // rebuild/replace the scriptSig without them
                 var replacement = scripts.scriptHashInput(scripts.multisigInput(signatures), redeemScript)
-                assert.strictEqual(replacement.toASM(), sign.scriptSigFiltered)
+                assert.strictEqual(scripts.toASM(replacement), sign.scriptSigFiltered)
 
                 tx.ins[i].script = replacement
               }
@@ -292,7 +291,7 @@ describe('TransactionBuilder', function () {
             tx = txb.buildIncomplete()
 
             // now verify the serialized scriptSig is as expected
-            assert.strictEqual(tx.ins[i].script.toASM(), sign.scriptSig)
+            assert.strictEqual(scripts.toASM(tx.ins[i].script), sign.scriptSig)
           })
         })
 
@@ -309,7 +308,7 @@ describe('TransactionBuilder', function () {
 
       txb = TransactionBuilder.fromTransaction(lameTx, network)
 
-      var redeemScript = Script.fromASM('OP_2 0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 04c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee51ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a 04f9308a019258c31049344f85f89d5229b531c845836f99b08601f113bce036f9388f7b0f632de8140fe337e62a37f3566500a99934c2231b6cb9fd7584b8e672 OP_3 OP_CHECKMULTISIG')
+      var redeemScript = scripts.fromASM('OP_2 0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 04c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee51ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a 04f9308a019258c31049344f85f89d5229b531c845836f99b08601f113bce036f9388f7b0f632de8140fe337e62a37f3566500a99934c2231b6cb9fd7584b8e672 OP_3 OP_CHECKMULTISIG')
 
       var keyPair = ECPair.fromWIF('91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgx3cTMqe', network)
       txb.sign(0, keyPair, redeemScript)