diff --git a/src/ecsignature.js b/src/ecsignature.js
index cbf9f817c..151e962d6 100644
--- a/src/ecsignature.js
+++ b/src/ecsignature.js
@@ -71,7 +71,7 @@ ECSignature.parseScriptSignature = function (buffer) {
   var hashType = buffer.readUInt8(buffer.length - 1)
   var hashTypeMod = hashType & ~0x80
 
-  assert(hashTypeMod > 0x00 && hashTypeMod < 0x04, 'Invalid hashType ' + hashType)
+  if (hashTypeMod <= 0x00 || hashTypeMod >= 0x04) throw new Error('Invalid hashType ' + hashType)
 
   return {
     signature: ECSignature.fromDER(buffer.slice(0, -1)),
diff --git a/src/message.js b/src/message.js
index b2c584c4d..75a3e2efc 100644
--- a/src/message.js
+++ b/src/message.js
@@ -30,7 +30,6 @@ function sign (keyPair, message, network) {
   return signature.toCompact(i, keyPair.compressed)
 }
 
-// TODO: network could be implied from address
 function verify (address, signature, message, network) {
   if (!Buffer.isBuffer(signature)) {
     signature = new Buffer(signature, 'base64')
diff --git a/src/networks.js b/src/networks.js
index d694bf767..60690ffec 100644
--- a/src/networks.js
+++ b/src/networks.js
@@ -3,7 +3,6 @@
 
 module.exports = {
   bitcoin: {
-    magic: 0xd9b4bef9,
     messagePrefix: '\x18Bitcoin Signed Message:\n',
     bip32: {
       public: 0x0488b21e,
@@ -15,7 +14,6 @@ module.exports = {
     dustThreshold: 546 // https://github.com/bitcoin/bitcoin/blob/v0.9.2/src/core.h#L151-L162
   },
   testnet: {
-    magic: 0xd9b4bef9,
     messagePrefix: '\x18Bitcoin Signed Message:\n',
     bip32: {
       public: 0x043587cf,
@@ -27,7 +25,6 @@ module.exports = {
     dustThreshold: 546
   },
   litecoin: {
-    magic: 0xd9b4bef9,
     messagePrefix: '\x19Litecoin Signed Message:\n',
     bip32: {
       public: 0x019da462,
diff --git a/src/transaction.js b/src/transaction.js
index 63705fa8f..95cd2be50 100644
--- a/src/transaction.js
+++ b/src/transaction.js
@@ -177,7 +177,7 @@ Transaction.prototype.clone = function () {
   return newTx
 }
 
-var one = new Buffer('0000000000000000000000000000000000000000000000000000000000000001', 'hex')
+var ONE = new Buffer('0000000000000000000000000000000000000000000000000000000000000001', 'hex')
 
 /**
  * Hash transaction for signing a specific input.
@@ -195,7 +195,7 @@ Transaction.prototype.hashForSignature = function (inIndex, prevOutScript, hashT
   assert(inIndex >= 0, 'Invalid vin index')
 
   // https://github.com/bitcoin/bitcoin/blob/master/src/test/sighash_tests.cpp#L29
-  if (inIndex >= this.ins.length) return one
+  if (inIndex >= this.ins.length) return ONE
 
   var txTmp = this.clone()
 
@@ -225,7 +225,7 @@ Transaction.prototype.hashForSignature = function (inIndex, prevOutScript, hashT
 
     // only lock-in the txOut payee at same index as txIn
     // https://github.com/bitcoin/bitcoin/blob/master/src/test/sighash_tests.cpp#L60
-    if (nOut >= this.outs.length) return one
+    if (nOut >= this.outs.length) return ONE
 
     txTmp.outs = txTmp.outs.slice(0, nOut + 1)