diff --git a/ScriptInterpreter.js b/ScriptInterpreter.js
index ebc5728..ee9f07b 100644
--- a/ScriptInterpreter.js
+++ b/ScriptInterpreter.js
@@ -20,7 +20,7 @@ function spec(b) {
   function ScriptInterpreter() {
     this.stack = [];
     this.disableUnsafeOpcodes = true;
-  };
+  }
 
   ScriptInterpreter.prototype.eval = function eval(script, tx, inIndex, hashType, callback) {
     if ("function" !== typeof callback) {
@@ -76,22 +76,22 @@ function spec(b) {
         }
 
         if (this.disableUnsafeOpcodes &&
-            "number" === typeof opcode &&
-            (opcode === OP_CAT ||
-             opcode === OP_SUBSTR ||
-             opcode === OP_LEFT ||
-             opcode === OP_RIGHT ||
-             opcode === OP_INVERT ||
-             opcode === OP_AND ||
-             opcode === OP_OR ||
-             opcode === OP_XOR ||
-             opcode === OP_2MUL ||
-             opcode === OP_2DIV ||
-             opcode === OP_MUL ||
-             opcode === OP_DIV ||
-             opcode === OP_MOD ||
-             opcode === OP_LSHIFT ||
-             opcode === OP_RSHIFT)) {
+          "number" === typeof opcode &&
+          (opcode === OP_CAT ||
+            opcode === OP_SUBSTR ||
+            opcode === OP_LEFT ||
+            opcode === OP_RIGHT ||
+            opcode === OP_INVERT ||
+            opcode === OP_AND ||
+            opcode === OP_OR ||
+            opcode === OP_XOR ||
+            opcode === OP_2MUL ||
+            opcode === OP_2DIV ||
+            opcode === OP_MUL ||
+            opcode === OP_DIV ||
+            opcode === OP_MOD ||
+            opcode === OP_LSHIFT ||
+            opcode === OP_RSHIFT)) {
           throw new Error("Encountered a disabled opcode");
         }
 
@@ -619,15 +619,15 @@ function spec(b) {
 
               // Verify signature
               checkSig(sig, pubkey, scriptCode, tx, inIndex, hashType, function(e, result) {
-                  try {
+                try {
                   var success;
 
                   if (e) {
-                  // We intentionally ignore errors during signature verification and
-                  // treat these cases as an invalid signature.
-                  success = false;
+                    // We intentionally ignore errors during signature verification and
+                    // treat these cases as an invalid signature.
+                    success = false;
                   } else {
-                  success = result;
+                    success = result;
                   }
 
                   // Update stack
@@ -635,18 +635,18 @@ function spec(b) {
                   this.stackPop();
                   this.stack.push(new Buffer([success ? 1 : 0]));
                   if (opcode === OP_CHECKSIGVERIFY) {
-                  if (success) {
-                  this.stackPop();
-                  } else {
-                  throw new Error("OP_CHECKSIGVERIFY negative");
-                  }
+                    if (success) {
+                      this.stackPop();
+                    } else {
+                      throw new Error("OP_CHECKSIGVERIFY negative");
+                    }
                   }
 
                   // Run next step
                   executeStep.call(this, cb);
-                  } catch (e) {
-                    cb(e);
-                  }
+                } catch (e) {
+                  cb(e);
+                }
               }.bind(this));
 
               // Note that for asynchronous opcodes we have to return here to prevent
@@ -690,12 +690,12 @@ function spec(b) {
 
               // Drop the signatures, since a signature can't sign itself
               sigs.forEach(function(sig) {
-                  scriptCode.findAndDelete(sig);
-                  });
+                scriptCode.findAndDelete(sig);
+              });
 
               var success = true,
-                  isig = 0,
-                  ikey = 0;
+                isig = 0,
+                ikey = 0;
               checkMultiSigStep.call(this);
 
               function checkMultiSigStep() {
@@ -705,26 +705,26 @@ function spec(b) {
                     var key = keys[ikey];
 
                     checkSig(sig, key, scriptCode, tx, inIndex, hashType, function(e, result) {
-                        try {
+                      try {
                         if (!e && result) {
-                        isig++;
-                        sigsCount--;
+                          isig++;
+                          sigsCount--;
                         } else {
-                        ikey++;
-                        keysCount--;
+                          ikey++;
+                          keysCount--;
 
-                        // If there are more signatures than keys left, then too many
-                        // signatures have failed
-                        if (sigsCount > keysCount) {
-                        success = false;
-                        }
+                          // If there are more signatures than keys left, then too many
+                          // signatures have failed
+                          if (sigsCount > keysCount) {
+                            success = false;
+                          }
                         }
 
                         checkMultiSigStep.call(this);
-                        } catch (e) {
+                      } catch (e) {
                         cb(e);
-                        }
-                        }.bind(this));
+                      }
+                    }.bind(this));
                   } else {
                     this.stack.push(new Buffer([success ? 1 : 0]));
                     if (opcode === OP_CHECKMULTISIGVERIFY) {
@@ -748,7 +748,7 @@ function spec(b) {
               return;
 
             default:
-              console.log('opcode '+opcode);
+              console.log('opcode ' + opcode);
               throw new Error("Unknown opcode encountered");
           }
 
@@ -767,7 +767,7 @@ function spec(b) {
         }
       } catch (e) {
         log.debug("Script aborted: " +
-            (e.message ? e.message : e));
+          (e.message ? e.message : e));
         cb(e);
       }
     }
@@ -778,14 +778,14 @@ function spec(b) {
       var self = this;
 
       self.eval(scriptSig, tx, n, hashType, function(e) {
-          if (e) {
+        if (e) {
           callback(e)
           return;
-          }
+        }
 
-          self.eval(scriptPubkey, tx, n, hashType, callback);
-          });
-    };
+        self.eval(scriptPubkey, tx, n, hashType, callback);
+      });
+  };
 
   /**
    * Get the top element of the stack.
@@ -825,7 +825,7 @@ function spec(b) {
     }
 
     var s = this.stack,
-        l = s.length;
+      l = s.length;
 
     var tmp = s[l - a];
     s[l - a] = s[l - b];
@@ -840,16 +840,16 @@ function spec(b) {
    */
   ScriptInterpreter.prototype.getPrimitiveStack = function getPrimitiveStack() {
     return this.stack.map(function(entry) {
-        if (entry.length > 2) {
+      if (entry.length > 2) {
         return buffertools.toHex(entry.slice(0));
-        }
-        var num = castBigint(entry);
-        if (num.cmp(-128) >= 0 && num.cmp(127) <= 0) {
+      }
+      var num = castBigint(entry);
+      if (num.cmp(-128) >= 0 && num.cmp(127) <= 0) {
         return num.toNumber();
-        } else {
+      } else {
         return buffertools.toHex(entry.slice(0));
-        }
-        });
+      }
+    });
   };
 
   var castBool = ScriptInterpreter.castBool = function castBool(v) {