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-rw-r--r--app/scripts/keyrings/simple.js41
1 files changed, 41 insertions, 0 deletions
diff --git a/app/scripts/keyrings/simple.js b/app/scripts/keyrings/simple.js
index 59d4691c6..6c5af1884 100644
--- a/app/scripts/keyrings/simple.js
+++ b/app/scripts/keyrings/simple.js
@@ -1,5 +1,6 @@
const EventEmitter = require('events').EventEmitter
const Wallet = require('ethereumjs-wallet')
+const ethUtil = require('ethereumjs-util')
const type = 'Simple Key Pair'
module.exports = class SimpleKeyring extends EventEmitter {
@@ -40,4 +41,44 @@ module.exports = class SimpleKeyring extends EventEmitter {
return this.wallets.map(w => w.getAddress().toString('hex'))
}
+ // tx is an instance of the ethereumjs-transaction class.
+ signTransaction(address, tx) {
+ const wallet = this.getWalletForAccount(address)
+ var privKey = wallet.getPrivateKey()
+ tx.sign(privKey)
+ return tx
+ }
+
+ // For eth_sign, we need to sign transactions:
+ signMessage(withAccount, data) {
+ const wallet = this.getWalletForAccount(withAccount)
+ const message = ethUtil.removeHexPrefix(data)
+ var privKey = wallet.getPrivateKey()
+ var msgSig = ethUtil.ecsign(new Buffer(message, 'hex'), privKey)
+ var rawMsgSig = ethUtil.bufferToHex(concatSig(msgSig.v, msgSig.r, msgSig.s))
+ return rawMsgSig
+ }
+
+ getWalletForAccount(account) {
+ return this.wallets.find(w => w.getAddress().toString('hex') === account)
+ }
+
+}
+
+function concatSig (v, r, s) {
+ const rSig = ethUtil.fromSigned(r)
+ const sSig = ethUtil.fromSigned(s)
+ const vSig = ethUtil.bufferToInt(v)
+ const rStr = padWithZeroes(ethUtil.toUnsigned(rSig).toString('hex'), 64)
+ const sStr = padWithZeroes(ethUtil.toUnsigned(sSig).toString('hex'), 64)
+ const vStr = ethUtil.stripHexPrefix(ethUtil.intToHex(vSig))
+ return ethUtil.addHexPrefix(rStr.concat(sStr, vStr)).toString('hex')
+}
+
+function padWithZeroes (number, length) {
+ var myString = '' + number
+ while (myString.length < length) {
+ myString = '0' + myString
+ }
+ return myString
}