diff --git a/lib/bcoin/chain.js b/lib/bcoin/chain.js
index c3791a8f..b9202426 100644
--- a/lib/bcoin/chain.js
+++ b/lib/bcoin/chain.js
@@ -412,8 +412,10 @@ Chain.prototype._removeBlock = function _removeBlock(tip, callback) {
     if (self.mempool)
       self.mempool.removeBlock(block);
 
+    self.emit('remove block', block.hash('hex'));
+
     block.txs.forEach(function(tx) {
-      self.emit('remove', tx.hash('hex'), block.hash('hex'));
+      self.emit('remove tx', tx.hash('hex'));
     });
 
     return callback();
@@ -473,7 +475,7 @@ Chain.prototype._verify = function _verify(block, prev) {
   }
 
   // Ensure the miner's target is equal to what we expect
-  if (block.bits !== block.chain.getTarget(prev, block)) {
+  if (block.bits !== this.getTarget(prev, block)) {
     utils.debug('Block is using wrong target: %s', block.rhash);
     return false;
   }
@@ -561,17 +563,6 @@ Chain.prototype._verify = function _verify(block, prev) {
       return false;
     }
 
-    // Check for tx sigops limits
-    // Bitcoind does not check for this when accepting
-    // a block even though it probably should.
-    // if (tx.getSigops(true) > constants.script.maxTxSigops) {
-    //   // Block 71036 abused checksig to
-    //   // include a huge number of sigops.
-    //   utils.debug('Block TX has too many sigops: %s', block.rhash);
-    //   if (!(network.type === 'main' && height === 71036))
-    //     return false;
-    // }
-
     // Check for block sigops limits
     // Start counting P2SH sigops once block
     // timestamps reach March 31st, 2012.
diff --git a/lib/bcoin/script.js b/lib/bcoin/script.js
index 0cf2caf8..63f4b75b 100644
--- a/lib/bcoin/script.js
+++ b/lib/bcoin/script.js
@@ -1615,12 +1615,15 @@ script.getUnknownData = function getUnknownData(s) {
 };
 
 script.getInputKeys = function getInputKeys(s, prev) {
+  if (prev) {
+    if (script.isScripthash(prev))
+      return script.getOutputKeys(script.getRedeem(s));
+    return script.getOutputKeys(prev);
+  }
+
   if (script.isScripthashInput(s))
     return script.getOutputKeys(script.getRedeem(s));
 
-  if (prev)
-    return script.getOutputKeys(prev);
-
   if (script.isPubkeyhashInput(s))
     return [s[1]];
 
@@ -1638,12 +1641,15 @@ script.getOutputKeys = function getOutputKeys(s) {
 };
 
 script.getInputKeyHashes = function getInputKeyHashes(s, prev) {
+  if (prev) {
+    if (script.isScripthash(prev))
+      return script.getOutputKeyHashes(script.getRedeem(s));
+    return script.getOuputKeyHashes(prev);
+  }
+
   if (script.isScripthashInput(s))
     return script.getOutputKeyHashes(script.getRedeem(s));
 
-  if (prev)
-    return script.getOuputKeyHashes(prev);
-
   if (script.isPubkeyhashInput(s))
     return [bcoin.address.hash160(s[1])];
 
@@ -1715,12 +1721,15 @@ script.getOutputAddress = function getOutputAddress(s) {
 };
 
 script.getInputMN = function getInputMN(s, prev) {
+  if (prev) {
+    if (script.isScripthash(prev))
+      return script.getOutputMN(script.getRedeem(s));
+    return script.getOuputMN(prev);
+  }
+
   if (script.isScripthashInput(s))
     return script.getOutputMN(script.getRedeem(s));
 
-  if (prev)
-    return script.getOuputMN(prev);
-
   return { m: 1, n: 1 };
 };
 
@@ -1747,7 +1756,7 @@ script.isPubkey = function isPubkey(s, key) {
       return false;
   }
 
-  return s[0];
+  return true;
 };
 
 script.isPubkeyhash = function isPubkeyhash(s, hash) {
@@ -1770,7 +1779,7 @@ script.isPubkeyhash = function isPubkeyhash(s, hash) {
       return false;
   }
 
-  return s[2];
+  return true;
 };
 
 script.isMultisig = function isMultisig(s, keys) {
@@ -1836,11 +1845,7 @@ script.isMultisig = function isMultisig(s, keys) {
       return false;
   }
 
-  return {
-    keys: s.slice(1, n + 1),
-    m: m,
-    n: n
-  };
+  return true;
 };
 
 script.isScripthash = function isScripthash(s, hash) {
@@ -1861,7 +1866,7 @@ script.isScripthash = function isScripthash(s, hash) {
       return false;
   }
 
-  return s[1];
+  return true;
 };
 
 script.isNulldata = function isNulldata(s) {
@@ -1875,7 +1880,7 @@ script.isNulldata = function isNulldata(s) {
   if (!res)
     return false;
 
-  return s[1];
+  return true;
 };
 
 script.getInputType = function getInputType(s, prev) {
@@ -1906,7 +1911,7 @@ script.isPubkeyInput = function isPubkeyInput(s, key, tx, i) {
       return false;
   }
 
-  return s[0];
+  return true;
 };
 
 script.isPubkeyhashInput = function isPubkeyhashInput(s, key) {
@@ -1924,7 +1929,7 @@ script.isPubkeyhashInput = function isPubkeyhashInput(s, key) {
       return false;
   }
 
-  return s[1];
+  return true;
 };
 
 script.isMultisigInput = function isMultisigInput(s, keys, tx, i) {
@@ -1970,10 +1975,7 @@ script.isMultisigInput = function isMultisigInput(s, keys, tx, i) {
   //   recovered.push(key);
   // }
 
-  return {
-    signatures: s.slice(1),
-    m: s.length - 1
-  };
+  return true;
 };
 
 script.isScripthashInput = function isScripthashInput(s, data, strict) {
@@ -2011,12 +2013,12 @@ script.isScripthashInput = function isScripthashInput(s, data, strict) {
   // Check data against last array in case
   // a raw redeem script was passed in.
   if (data && utils.isEqual(data, raw))
-    return raw;
+    return true;
 
   // Return here if we do not want to check
   // against standard transaction types.
   if (!strict)
-    return raw;
+    return true;
 
   // P2SH redeem scripts can be nonstandard: make
   // it easier for other functions to parse this.
@@ -2039,7 +2041,7 @@ script.isScripthashInput = function isScripthashInput(s, data, strict) {
     return false;
   }
 
-  return raw;
+  return true;
 };
 
 script.getCoinbaseData = function getCoinbaseData(s) {
@@ -2391,9 +2393,14 @@ script.getSigops = function getSigops(s, accurate) {
   return n;
 };
 
-script.getScripthashSigops = function getScripthashSigops(s) {
-  if (!script.isScripthashInput(s))
-    return 0;
+script.getScripthashSigops = function getScripthashSigops(s, prev) {
+  if (prev) {
+    if (!script.isScripthash(prev))
+      return 0;
+  } else {
+    if (!script.isScripthashInput(s))
+      return 0;
+  }
 
   if (!script.isPushOnly(s))
     return 0;
diff --git a/lib/bcoin/tx.js b/lib/bcoin/tx.js
index 74c6a30a..7ebf71da 100644
--- a/lib/bcoin/tx.js
+++ b/lib/bcoin/tx.js
@@ -1523,9 +1523,12 @@ TX.prototype.isFinal = function isFinal(height, ts) {
 TX.prototype.getSigops = function getSigops(scriptHash, accurate) {
   var n = 0;
   this.inputs.forEach(function(input) {
+    var prev;
     n += bcoin.script.getSigops(input.script, accurate);
-    if (scriptHash && !this.isCoinbase())
-      n += bcoin.script.getScripthashSigops(input.script);
+    if (scriptHash && !this.isCoinbase()) {
+      prev = input.output ? input.output.script : null;
+      n += bcoin.script.getScripthashSigops(input.script, prev);
+    }
   }, this);
   this.outputs.forEach(function(output) {
     n += bcoin.script.getSigops(output.script, accurate);