首次放到 git

utils/contract-address.js

@@ -0,0 +1,20 @@
+
+var getAddress = require('./address').getAddress;
+var convert = require('./convert');
+var keccak256 = require('./keccak256');
+var RLP = require('./rlp');
+
+// http://ethereum.stackexchange.com/questions/760/how-is-the-address-of-an-ethereum-contract-computed
+function getContractAddress(transaction) {
+    if (!transaction.from) { throw new Error('missing from address'); }
+    var nonce = transaction.nonce;
+
+    return getAddress('0x' + keccak256(RLP.encode([
+        getAddress(transaction.from),
+        convert.stripZeros(convert.hexlify(nonce, 'nonce'))
+    ])).substring(26));
+}
+
+module.exports = {
+    getContractAddress: getContractAddress,
+}