fix bug related with chunks length

fanatid · Oct 12, 2015 · ac0a17c · ac0a17c
1 parent 6e0535f
commit ac0a17c
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "script2addresses",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "Transform bitcoin script to bitcoin addresses",
   "keywords": [
     "bitcoin",

diff --git a/src/index.js b/src/index.js
@@ -53,6 +53,9 @@ export default function (script, network, strict) {
   network = network || Networks.get(network) || Networks.defaultNetwork
 
   let sChunks = script.chunks
+  if (sChunks.length === 0) {
+    return {type: 'unknow'}
+  }
 
   switch (sChunks[0].opcodenum) {
     // pubkeyhash
@@ -115,7 +118,7 @@ export default function (script, network, strict) {
 
       // multisig
       let mOp = sChunks[0].opcodenum
-      let nOp = sChunks[sChunks.length - 2].opcodenum
+      let nOp = sChunks[Math.max(sChunks.length - 2, 0)].opcodenum
       if (sChunks.length >= 4 &&
           sChunks[sChunks.length - 1].opcodenum === Opcode.OP_CHECKMULTISIG &&
           mOp >= Opcode.OP_1 &&