bigchaindb/js-bigchaindb-driver
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(needs rework): multi input serialization for divisible assets

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This commit is contained in:
diminator 2017-02-18 03:04:12 +01:00
parent f436896d96
commit 1c5ec81ed2
1 changed files with 14 additions and 6 deletions
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20
index.js
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@ -141,8 +141,7 @@ export function signTransaction(transaction, ...privateKeys) {
signedTx.inputs.forEach((input, index) => {
const privateKey = privateKeys[index];
const privateKeyBuffer = new Buffer(base58.decode(privateKey));
const serializedTransaction = serializeTransactionIntoCanonicalString(transaction);
const serializedTransaction = serializeTransactionIntoCanonicalString(transaction, input);
const ed25519Fulfillment = new cc.Ed25519();
ed25519Fulfillment.sign(new Buffer(serializedTransaction), privateKeyBuffer);
const fulfillmentUri = ed25519Fulfillment.serializeUri();
@ -209,14 +208,23 @@ function sha256Hash(data) {
.hex();
}
function serializeTransactionIntoCanonicalString(transaction) {
function serializeTransactionIntoCanonicalString(transaction, input) {
// BigchainDB signs fulfillments by serializing transactions into a "canonical" format where
// each fulfillment URI is removed before sorting the remaining keys
const tx = clone(transaction);
tx.inputs.forEach((input) => {
input.fulfillment = null;
});
let match;
tx.inputs.forEach((_input) => {
if (!(_input && input && _input['fulfills'] && input['fulfills']
&& !(_input['fulfills']['txid'] === input['fulfills']['txid']
&& _input['fulfills']['output'] === input['fulfills']['output']))) {
match = tx.inputs.indexOf(_input);
}
_input.fulfillment = null;
});
if (input && match >= 0 && tx.inputs) {
tx.inputs = [tx.inputs[match]];
}
// Sort the keys
return stableStringify(tx, (a, b) => (a.key > b.key ? 1 : -1));
}