js-bigchaindb-driver/test/transaction/test_cryptoconditions.js

import test from 'ava'
import cc from 'five-bells-condition'
import { Ed25519Keypair, Transaction } from '../../src'


test('Ed25519 condition encoding', t => {
    const publicKey = '4zvwRjXUKGfvwnParsHAS3HuSVzV5cA4McphgmoCtajS'
    const target = {
        details: {
            type: 'ed25519-sha-256',
            public_key: publicKey,
            signature: null,
        },
        uri: 'ni:///sha-256;uLdVX7FEjLWVDkAkfMAkEqPPwFqZj7qfiGE152t_x5c?fpt=ed25519-sha-256&cost=131072'
    }
    t.deepEqual(target, Transaction.makeEd25519Condition(publicKey))
})


test('Threshold condition encoding', t => {
    const publicKey = '4zvwRjXUKGfvwnParsHAS3HuSVzV5cA4McphgmoCtajS'
    const condition = Transaction.makeThresholdCondition(
            1, [Transaction.makeEd25519Condition(publicKey, false)])
    const target = {
        details: {
            type: 'threshold-sha-256',
            threshold: 1,
            subfulfillments: [{
                type: 'ed25519-sha-256',
                public_key: publicKey,
                signature: null,
            }]
        },
        uri: 'ni:///sha-256;VBIfZSoBprUQy-LVNAzaZ2q-eyWbrcPKtBg1PuNXIpQ?fpt=threshold-sha-256&cost=132096&subtypes=ed25519-sha-256'
    }
    t.deepEqual(target, condition)
})


test('Fulfillment correctly formed', t => {
    const alice = new Ed25519Keypair()
    const txCreate = Transaction.makeCreateTransaction(
        {},
        {},
        [Transaction.makeOutput(Transaction.makeEd25519Condition(alice.publicKey))],
        alice.publicKey
    )
    const txTransfer = Transaction.makeTransferTransaction(
        txCreate,
        {},
        [Transaction.makeOutput(Transaction.makeEd25519Condition(alice.publicKey))],
        [0]
    )
    const msg = Transaction.serializeTransactionIntoCanonicalString(txTransfer)
    const txSigned = Transaction.signTransaction(txTransfer, alice.privateKey)
    t.truthy(cc.validateFulfillment(txSigned.inputs[0].fulfillment,
                                    txCreate.outputs[0].condition.uri,
                                    new Buffer(msg)))
})