/
GasRepayer.js
161 lines (136 loc) · 6.14 KB
/
GasRepayer.js
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var GasRepayer = artifacts.require('GasRepayer');
var MessageHub = artifacts.require('MessageHub');
// const { BN, expectEvent, expectRevert } = require('@openzeppelin/test-helpers');
const { TypedDataUtils } = require('eth-sig-util')
const tools = require('../utils/tools');
const wallets = require('../utils/wallets');
Object.extract = (obj, keys) => keys.map(key => obj[key]);
function extractEvents(txMined, address, name)
{
return txMined.logs.filter((ev) => { return ev.address == address && ev.event == name });
}
async function prepareGMTX(gmtx)
{
const call = gmtx.target.contract.methods[gmtx.selector](...gmtx.args)
return {
from: gmtx.from,
data: call.encodeABI(),
gas: gmtx.gas || await call.estimateGas(),
value: gmtx.value || 0,
nonce: gmtx.nonce || 0,
expiry: gmtx.expiry || 0,
salt: gmtx.salt || web3.utils.randomHex(32),
}
}
contract('GasRepayer', async (accounts) => {
const [relayer, repayer, user] = accounts;
/***************************************************************************
* Environment configuration *
***************************************************************************/
before('configure', async () => {
console.log('# web3 version:', web3.version);
/**
* Retreive deployed contracts
*/
GasRepayerInstance = await GasRepayer.deployed();
MessageHubInstance = await MessageHub.deployed();
GAS_PRICE = await web3.eth.getGasPrice();
});
describe('pre flight check', async () => {
it('domains', async () => {
messagehub_domain = await MessageHubInstance.gmtx_domain();
assert.equal(messagehub_domain.name, 'GeneralizedMetaTX' );
assert.equal(messagehub_domain.version, '0.0.1-beta.1' );
assert.equal(messagehub_domain.chainId, '1' ); // TODO: wait for ganache fix
assert.equal(messagehub_domain.verifyingContract, MessageHubInstance.address);
gasrelayer_domain = await GasRepayerInstance.gmtx_domain();
assert.equal(gasrelayer_domain.name, 'GeneralizedMetaTX' );
assert.equal(gasrelayer_domain.version, '0.0.1-beta.1' );
assert.equal(gasrelayer_domain.chainId, '1' ); // TODO: wait for ganache fix
assert.equal(gasrelayer_domain.verifyingContract, GasRepayerInstance.address);
});
it('deposit to gasrepayer contract', async () => {
const value = 1 * 10 ** 18;
await GasRepayerInstance.mint({ from: repayer, value })
assert.equal(await GasRepayerInstance.balanceOf(repayer), value);
});
});
describe('MessageHub', async () => {
describe('relayed call', async () => {
it('prepare gmtx', async () => {
// User meta-transaction
messagehub_gmtx = await prepareGMTX({
from: user,
target: MessageHubInstance,
selector: 'publish(string)',
args: [
'relayed-call-test',
],
});
messagehub_sign = await tools.sign(messagehub_gmtx, MessageHubInstance, wallets.privateKeys[user.toLowerCase()]);
// Repayer meta-transaction (wraps the user-metatransaction)
gasrelayer_gmtx = await prepareGMTX({
from: repayer,
target: GasRepayerInstance,
selector: 'relayAndRepay(address,bytes,uint256)',
args: [
MessageHubInstance.address,
MessageHubInstance.contract.methods.receiveMetaTx(messagehub_gmtx, messagehub_sign).encodeABI(),
GAS_PRICE,
],
gas: 100000, // preparation fails due to ERC20 burn
});
gasrelayer_sign = await tools.sign(gasrelayer_gmtx, GasRepayerInstance, wallets.privateKeys[repayer.toLowerCase()]);
// Only for MessageHub purposes
_messagehub_digest = '0x'+TypedDataUtils.sign({
domain: messagehub_domain,
types: tools.TYPES,
primaryType: 'GMTX',
message: messagehub_gmtx,
}).toString('hex');
// Only for MessageHub purposes
_gasrelayer_digest = '0x'+TypedDataUtils.sign({
domain: gasrelayer_domain,
types: tools.TYPES,
primaryType: 'GMTX',
message: gasrelayer_gmtx,
}).toString('hex');
});
it('before', async () => {
assert.equal(await GasRepayerInstance.gmtx_nonce(repayer), 0);
assert.equal(await MessageHubInstance.gmtx_nonce(user), 0);
assert.equal(await GasRepayerInstance.gmtx_replay(_gasrelayer_digest), false);
assert.equal(await MessageHubInstance.gmtx_replay(_messagehub_digest), false);
});
it('tx', async () => {
txMined = await GasRepayerInstance.receiveMetaTx(gasrelayer_gmtx, gasrelayer_sign, { from: relayer });
// Not instrumented correctly by truffle
// events = extractEvents(txMined, MessageHubInstance.address, 'NewMessage');
// assert.equal(events.length, 1);
// assert.equal(events[0].args.sender, repayer);
// assert.equal(events[0].args.message, 'relayed-call-test');
events = extractEvents(txMined, MessageHubInstance.address, 'GMTXReceived');
assert.equal(events.length, 1);
assert.equal(events[0].args.hash, _messagehub_digest);
events = extractEvents(txMined, GasRepayerInstance.address, 'GMTXReceived');
assert.equal(events.length, 1);
assert.equal(events[0].args.hash, _gasrelayer_digest);
events = extractEvents(txMined, GasRepayerInstance.address, 'CallOutcome');
assert.equal(events.length, 1);
assert.equal(events[0].args.success, true);
assert.equal(events[0].args.returnData, null);
events = extractEvents(txMined, GasRepayerInstance.address, 'Transfer');
assert.equal(events.length, 1);
// console.log(Number(events[0].args.value));
// console.log(txMined.receipt.cumulativeGasUsed * GAS_PRICE);
console.log("net gas cost:", ((txMined.receipt.cumulativeGasUsed * GAS_PRICE) - Number(events[0].args.value)) / GAS_PRICE);
});
it('after', async () => {
assert.equal(await GasRepayerInstance.gmtx_nonce(repayer), 1);
assert.equal(await MessageHubInstance.gmtx_nonce(user), 1);
assert.equal(await GasRepayerInstance.gmtx_replay(_gasrelayer_digest), true);
assert.equal(await MessageHubInstance.gmtx_replay(_messagehub_digest), true);
});
});
});
});