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import { LiquidPledging } from 'giveth-liquidpledging';
import getGasPrice from './gasPrice';
import { sendEmail } from './utils';
import ForeignGivethBridge from './ForeignGivethBridge';
export default class Verifier {
constructor(homeWeb3, foreignWeb3, nonceTracker, config, db) {
this.homeWeb3 = homeWeb3;
this.foreignWeb3 = foreignWeb3;
this.nonceTracker = nonceTracker;
this.db = db;
this.config = config;
this.lp = new LiquidPledging(foreignWeb3, config.liquidPledging);
this.foreignBridge = new ForeignGivethBridge(foreignWeb3, config.foreignBridge);
this.currentHomeBlockNumber = undefined;
this.currentForeignBlockNumber = undefined;
this.account = homeWeb3.eth.accounts.wallet[0];
}
/* istanbul ignore next */
start() {
const intervalId = setInterval(() => this.verify(), this.config.pollTime);
this.verify();
}
verify() {
return Promise.all([
this.homeWeb3.eth.getBlockNumber(),
this.foreignWeb3.eth.getBlockNumber(),
])
.then(([homeBlockNumber, foreignBlockNumber]) => {
this.currentHomeBlockNumber = homeBlockNumber;
this.currentForeignBlockNumber = foreignBlockNumber;
return Promise.all([this.getFailedSendTxs(), this.getPendingTxs()]);
})
.then(([failedTxs, pendingTxs]) => {
const failedPromises = failedTxs.map(tx => this.verifyTx(tx));
const pendingPromises = pendingTxs.map(tx => this.verifyTx(tx));
Eif (this.config.isTest) {
return Promise.all([...failedPromises, ...pendingPromises]);
}
})
.catch(err => console.error('Failed to fetch block number ->', err));
}
verifyTx(tx) {
const web3 = tx.toHomeBridge ? this.homeWeb3 : this.foreignWeb3;
const currentBlock = tx.toHomeBridge
? this.currentHomeBlockNumber
: this.currentForeignBlockNumber;
const confirmations = tx.toHomeBridge
? this.config.homeConfirmations
: this.foreignConfirmations;
// order matters here
const txHash =
tx.reSendGiverTxHash ||
tx.reSendReceiverTxHash ||
tx.reSendCreateGiverTxHash ||
tx.txHash;
if (tx.status === 'pending') {
return web3.eth
.getTransactionReceipt(txHash)
.then(receipt => {
Iif (!receipt) return; // not mined
// only update if we have enough confirmations
if (currentBlock - receipt.blockNumber <= confirmations) return;
Eif (
receipt.status === true ||
receipt.status === '0x01' ||
receipt.status === '0x1' ||
receipt.status === 1
) {
// this was a createGiver tx, we still need to transfer the funds to the giver
if (txHash === tx.reSendCreateGiverTxHash) {
// GiverAdded event topic
const { topics } = receipt.logs.find(
l =>
l.topics[0] ===
'0xad9c62a4382fd0ddbc4a0cf6c2bc7df75b0b8beb786ff59014f39daaea7f232f',
);
tx.giverId = this.homeWeb3.utils.hexToNumber(topics[1]); // idGiver is 1st indexed param, thus 2nd topic
// we call handleFailedTx b/c this is still a failed tx. It is just multi-step b/c we needed to create a
// giver.
logger.debug('successfully created a giver ->', tx.giverId);
return this.handleFailedTx(tx);
}
this.updateTxData(
Object.assign(tx, {
status: 'confirmed',
}),
);
return;
}
return this.handleFailedTx(tx);
})
.catch(err => {
// ignore unknown tx b/c it is probably too early to check
if (!err.message.includes('unknown transaction')) {
logger.error('Failed to fetch tx receipt for tx', tx, err);
}
});
} else Eif (tx.status === 'failed-send') {
return this.handleFailedTx(tx);
} else {
sendEmail(this.config, `Unknown tx status \n\n ${JSON.stringify(tx, null, 2)}`);
logger.error('Unknown tx status ->', tx);
}
}
handleFailedTx(tx) {
const web3 = tx.toHomeBridge ? this.homeWeb3 : this.foreignWeb3;
const handleFailedReceiver = () =>
this.fetchAdmin(tx.receiverId).then(admin => {
logger.debug('handling failed receiver ->', tx.receiverId, admin, tx);
if (!admin || admin.adminType === '0') {
// giver
return this.sendToGiver(tx);
} else Iif (admin.adminType === '1') {
// delegate
if (tx.reSendCreateGiver && !tx.reSendReceiver) {
// giver failed, so try to send to receiver now
return this.sendToReceiver(tx, tx.receiverId);
}
return this.sendToGiver(tx);
} else Eif (admin.adminType === '2') {
// project
// check if there is a parentProject we can send to if project is canceled
return this.getParentProjectNotCanceled(tx.receiverId).then(projectId => {
if (
!projectId ||
(projectId === tx.receiverId &&
(!tx.reSendCreateGiver || tx.reSendReceiver)) ||
projectId == 0
)
return this.sendToGiver(tx);
return this.sendToReceiver(tx, projectId);
});
} else {
// shouldn't get here
sendEmail(
this.config,
`Unknown receiver adminType \n\n ${JSON.stringify(tx, null, 2)}`,
);
logger.error('Unknown receiver adminType ->', tx);
}
});
Iif (tx.toHomeBridge) {
// this shouldn't fail, send email as we need to investigate
sendEmail(
this.config,
`AuthorizePayment tx failed toHomeBridge \n\n ${JSON.stringify(tx, null, 2)}`,
);
logger.error('AuthorizePayment tx failed toHomeBridge ->', tx);
} else {
// check that the giver is valid
// if we don't have a giverId, we don't need to fetch the admin b/c this was a
// donateAndCreateGiver call and we need to handle the failed receiver
return (tx.giverId ? this.fetchAdmin(tx.giverId) : Promise.resolve(true)).then(
giverAdmin => (giverAdmin ? handleFailedReceiver() : this.createGiver(tx)),
);
}
}
fetchAdmin(id) {
return this.lp.getPledgeAdmin(id).catch(e => {
// receiver may not exist, catch error and pass undefined
logger.debug('Failed to fetch pledgeAdmin for adminId ->', id, e);
});
}
sendToGiver(tx) {
logger.debug('send to Giver');
// already attempted to send to giver, notify of failure
Iif (tx.reSendGiver) {
this.updateTxData(Object.assign(tx, { status: 'failed' }));
sendEmail(
this.config,
`ForeignBridge sendToGiver Tx failed. NEED TO TAKE ACTION \n\n${JSON.stringify(
tx,
null,
2,
)}`,
);
logger.error('ForeignBridge sendToGiver Tx failed. NEED TO TAKE ACTION ->', tx);
return;
}
Iif (!tx.giver && !tx.giverId) {
sendEmail(
this.config,
`Tx missing giver and giverId. Can't sendToGiver \n\n ${JSON.stringify(
tx,
null,
2,
)}`,
);
logger.error('Tx missing giver and giverId. Cant sendToGiver ->', tx);
return;
}
if (tx.giver && !tx.giverId) return this.createGiver(tx);
const data = this.lp.$contract.methods
.donate(tx.giverId, tx.giverId, tx.sideToken, tx.amount)
.encodeABI();
let nonce;
let txHash;
return this.nonceTracker
.obtainNonce()
.then(n => {
nonce = n;
return getGasPrice(this.config, false);
})
.then(gasPrice =>
this.foreignBridge.bridge
.deposit(tx.sender, tx.mainToken, tx.amount, tx.homeTx, data, {
from: this.account.address,
nonce,
gasPrice,
})
.on('transactionHash', transactionHash => {
this.nonceTracker.releaseNonce(nonce);
this.updateTxData(
Object.assign(tx, {
status: 'pending',
reSend: true,
reSendGiver: true,
reSendGiverTxHash: transactionHash,
}),
);
txHash = transactionHash;
})
.catch((err, receipt) => {
logger.debug('ForeignBridge resend tx error ->', err, receipt, txHash);
// if we have a txHash, then we will pick on the next run
if (!txHash) {
this.nonceTracker.releaseNonce(nonce, false, false);
this.updateTxData(
Object.assign(tx, {
status: 'failed-send',
reSend: true,
reSendGiverTxHash: false,
reSendGiver: true,
reSendGiverError: err,
}),
);
}
}),
);
}
createGiver(tx) {
Iif (tx.reSendCreateGiver) {
this.updateTxData(Object.assign(tx, { status: 'failed' }));
sendEmail(
this.config,
`ForeignBridge createGiver Tx failed. NEED TO TAKE ACTION \n\n${JSON.stringify(
tx,
null,
2,
)}`,
);
logger.error('ForeignBridge createGiver Tx failed. NEED TO TAKE ACTION ->', tx);
return;
}
let nonce;
let txHash;
return this.nonceTracker
.obtainNonce()
.then(n => {
nonce = n;
return getGasPrice(this.config, false);
})
.then(gasPrice =>
this.lp
.addGiver(tx.giver || tx.sender, '', '', 259200, 0, {
from: this.account.address,
nonce,
gasPrice,
})
.on('transactionHash', transactionHash => {
this.nonceTracker.releaseNonce(nonce);
this.updateTxData(
Object.assign(tx, {
status: 'pending',
reSend: true,
reSendCreateGiver: true,
reSendCreateGiverTxHash: transactionHash,
}),
);
txHash = transactionHash;
})
.catch((err, receipt) => {
logger.debug(
'ForeignBridge resend createGiver tx error ->',
err,
receipt,
txHash,
);
// if we have a txHash, then we will pick on the next run
if (!txHash) {
this.nonceTracker.releaseNonce(nonce, false, false);
this.updateTxData(
Object.assign(tx, {
status: 'failed-send',
reSend: true,
reSendCreateGiverError: err,
reSendCreateGiverTxHash: false,
reSendCreateGiver: true,
}),
);
}
}),
);
}
sendToReceiver(tx, newReceiverId) {
if (tx.receiverId !== newReceiverId) {
Eif (!tx.attemptedReceiverIds) tx.attemptedReceiverIds = [tx.receiverId];
tx.attemptedReceiverIds.push(newReceiverId);
}
tx.receiverId = newReceiverId;
Iif (!tx.giver && !tx.giverId) {
sendEmail(
this.config,
`Tx missing giver and giverId. Can't sendToParentProject\n\n ${JSON.stringify(
tx,
null,
2,
)}`,
);
logger.error('Tx missing giver and giverId. Cant sendToParentProject ->', tx);
return;
}
let data;
if (tx.giver) {
data = this.lp.$contract.methods
.addGiverAndDonate(tx.receiverId, tx.giver, tx.sideToken, tx.amount)
.encodeABI();
} else {
data = this.lp.$contract.methods
.donate(tx.giverId, tx.receiverId, tx.sideToken, tx.amount)
.encodeABI();
}
let nonce;
let txHash;
return this.nonceTracker
.obtainNonce()
.then(n => {
nonce = n;
return getGasPrice(this.config);
})
.then(gasPrice =>
this.foreignBridge.bridge
.deposit(tx.sender, tx.mainToken, tx.amount, tx.homeTx, data, {
from: this.account.address,
nonce,
gasPrice,
})
.on('transactionHash', transactionHash => {
this.nonceTracker.releaseNonce(nonce);
this.updateTxData(
Object.assign(tx, {
status: 'pending',
reSend: true,
reSendReceiver: true,
reSendReceiverTxHash: transactionHash,
}),
);
txHash = transactionHash;
})
.catch((err, receipt) => {
logger.debug('ForeignBridge resend tx error ->', err, receipt, txHash);
// if we have a txHash, then we will pick on the next run
if (!txHash) {
this.nonceTracker.releaseNonce(nonce, false, false);
this.updateTxData(
Object.assign(tx, {
status: 'failed-send',
reSend: true,
reSendReceiver: true,
reSendReceiverTxHash: false,
reSendReceiverError: err,
}),
);
}
}),
);
}
/**
* if projectId is active, return projectId
* otherwise returns first parentProject that is active
* return undefined if no active project found
*
* @param {*} projectId
* @returns Promise(projectId)
*/
getParentProjectNotCanceled(projectId) {
return this.lp
.isProjectCanceled(projectId)
.then(isCanceled => {
if (!isCanceled) return projectId;
return this.lp.getPledgeAdmin(projectId).then(admin => {
Eif (admin.parentProject)
return this.getParentProjectNotCanceled(admin.parentProject);
return undefined;
});
})
.catch(e => {
logger.debug('Failed to getParentProjectNotCanceled =>', projectId);
return undefined;
});
}
updateTxData(data) {
const { _id } = data;
this.db.txs.update({ _id }, data, {}, err => {
Iif (err) {
logger.error('Error updating bridge-txs.db ->', err, data);
process.exit();
}
});
}
getFailedSendTxs() {
return new Promise((resolve, reject) => {
this.db.txs.find(
{
status: 'failed-send',
$or: [{ reSend: { $exists: false } }, { reSend: false }],
$or: [{ notified: { $exists: false } }, { notified: false }],
},
(err, data) => {
Iif (err) {
logger.error('Error fetching failed-send txs from db ->', err);
resolve([]);
return;
}
resolve(data);
},
);
});
}
getPendingTxs() {
return new Promise((resolve, reject) => {
// this.db.txs.find({ status: 'pending' }, (err, data) => err ? reject(err) : resolve(Array.isArray(data) ? data : [data]))
this.db.txs.find({ status: 'pending' }, (err, data) => {
Iif (err) {
logger.error('Error fetching pending txs from db ->', err);
resolve([]);
return;
}
resolve(data);
});
});
}
}
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