UNPKG

giveth-bridge

Version:

Mainnet -> sidechain Giveth Bridge.

github.com/Giveth/giveth-bridge

Giveth/giveth-bridge

1,123 lines • 51.7 kB
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    <title>Code coverage report for Relayer.js</title>
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    <h1>
      <a href="index.html">All files</a> Relayer.js
    </h1>
    <div class='clearfix'>
      <div class='fl pad1y space-right2'>
        <span class="strong">75.41% </span>
        <span class="quiet">Statements</span>
        <span class='fraction'>92/122</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">53.85% </span>
        <span class="quiet">Branches</span>
        <span class='fraction'>21/39</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">78.57% </span>
        <span class="quiet">Functions</span>
        <span class='fraction'>33/42</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">76.92% </span>
        <span class="quiet">Lines</span>
        <span class='fraction'>90/117</span>
      </div>
    </div>
    <p class="quiet">
      Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
    </p>
  </div>
  <div class='status-line medium'></div>
<pre><table class="coverage">
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">import Web3 from 'web3';
import logger from 'winston';
import uuidv4 from 'uuid/v4';
import GivethBridge from './GivethBridge';
import ForeignGivethBridge from './ForeignGivethBridge';
import getGasPrice from './gasPrice';
import { sendEmail } from './utils';
&nbsp;
const BridgeData = {
    homeContractAddress: '',
    foreignContractAddress: '',
    homeBlockLastRelayed: 0,
    foreignBlockLastRelayed: 0,
};
&nbsp;
export class Tx {
    constructor(txHash, toHomeBridge, data = <span class="branch-0 cbranch-no" title="branch not covered" >{})</span> {
        this.txHash = txHash;
        this.toHomeBridge = toHomeBridge;
        // to-send - received event, need to submit tx
        // pending - tx submitted
        // confirmed - tx confirmend and correct number of blocks have passed for the network (config values)
        // failed - tx submitted and failed and correct number of blocks have passed for the network (config values)
        // failed-send - tx failed on send
        this.status = 'to-send';
        Object.assign(this, data);
    }
}
&nbsp;
export default class Relayer {
    constructor(homeWeb3, foreignWeb3, nonceTracker, config, db) {
        this.homeWeb3 = homeWeb3;
        this.foreignWeb3 = foreignWeb3;
        this.account = homeWeb3.eth.accounts.wallet[0];
        this.nonceTracker = nonceTracker;
&nbsp;
        this.homeBridge = new GivethBridge(
            this.homeWeb3,
            this.foreignWeb3,
            config.homeBridge,
            config.foreignBridge,
        );
        this.foreignBridge = new ForeignGivethBridge(this.foreignWeb3, config.foreignBridge);
&nbsp;
        this.db = db;
        this.config = config;
        this.pollingPromise;
        this.bridgeData;
    }
&nbsp;
    /* istanbul ignore next */
    start() {
        this.loadBridgeData().then(() =&gt; {
            // It is possible to have created txs, but not yet relayed
            // them, if the server was restarted in the middle of a relay
            // so do it now
            this.relayUnsentTxs();
&nbsp;
            const intervalId = setInterval(() =&gt; {
                if (this.pollingPromise) {
                    logger.debug('Already polling, running after previous round finishes');
                    this.pollingPromise.finally(() =&gt; {
                        logger.debug('polling round finished. starting next');
                        this.poll();
                    });
                } else {
                    this.poll();
                }
            }, this.config.pollTime);
&nbsp;
            this.poll();
        });
    }
&nbsp;
    sendForeignTx(tx, gasPrice) {
        const { sender, mainToken, amount, data, homeTx } = tx;
&nbsp;
        <span class="missing-if-branch" title="if path not taken" >I</span>if (!tx.sideToken) {
<span class="cstat-no" title="statement not covered" >            this.updateTxData(</span>
                Object.assign({}, tx, {
                    status: 'failed-send',
                    error: 'No sideToken for mainToken',
                }),
            );
<span class="cstat-no" title="statement not covered" >            return Promise.resolve();</span>
        }
&nbsp;
        let nonce;
        let txHash;
        return this.nonceTracker
            .obtainNonce()
            .then(n =&gt; {
                nonce = n;
                return this.foreignBridge.bridge
                    .deposit(sender, mainToken, amount, homeTx, data, {
                        from: this.account.address,
                        nonce,
                        gasPrice,
                    })
                    .on('transactionHash', transactionHash =&gt; {
                        txHash = transactionHash;
                        this.nonceTracker.releaseNonce(nonce);
                        this.updateTxData(Object.assign({}, tx, { txHash, status: 'pending' }));
                    });
            })
            .catch((error, receipt) =&gt; {
                logger.debug('ForeignBridge tx error -&gt;', error, receipt, txHash);
&nbsp;
                // if we have a txHash, then we will pick up the failure in the Verifyer
                <span class="missing-if-branch" title="else path not taken" >E</span>if (!txHash) {
                    this.nonceTracker.releaseNonce(nonce, false, false);
                    this.updateTxData(
                        Object.assign({}, tx, {
                            error,
                            status: 'failed-send',
                        }),
                    );
                }
            });
    }
&nbsp;
    sendHomeTx(tx, gasPrice) {
        const { recipient, token, amount, foreignTx } = tx;
        let nonce;
        let txHash;
        return this.nonceTracker
            .obtainNonce(true)
            .then(n =&gt; {
                nonce = n;
                return this.homeBridge.bridge
                    .authorizePayment('', foreignTx, recipient, token, amount, 0, {
                        from: this.account.address,
                        nonce,
                        gasPrice,
                    })
                    .on('transactionHash', transactionHash =&gt; {
                        txHash = transactionHash;
                        this.nonceTracker.releaseNonce(nonce, true, true);
                        this.updateTxData(
                            Object.assign(tx, {
                                txHash,
                                status: 'pending',
                            }),
                        );
                    });
            })
            .catch(<span class="fstat-no" title="function not covered" >(e</span>rror, receipt) =&gt; {
<span class="cstat-no" title="statement not covered" >                logger.debug('HomeBridge tx error -&gt;', error, receipt, txHash);</span>
&nbsp;
                // if we have a homeTxHash, then we will pick up the failure in the Verifyer
<span class="cstat-no" title="statement not covered" >                if (!txHash) {</span>
<span class="cstat-no" title="statement not covered" >                    this.nonceTracker.releaseNonce(nonce, true, false);</span>
<span class="cstat-no" title="statement not covered" >                    this.updateTxData(</span>
                        Object.assign({}, tx, {
                            status: 'failed-send',
                            error,
                        }),
                    );
                }
            });
    }
&nbsp;
    poll() {
        if (!this.bridgeData) return this.loadBridgeData().then(() =&gt; this.poll());
&nbsp;
        let homeFromBlock;
        let homeToBlock;
        let homeGasPrice;
        let foreignFromBlock;
        let foreignToBlock;
        let foreignGasPrice;
&nbsp;
        this.pollingPromise = Promise.all([
            this.homeWeb3.eth.getBlockNumber(),
            this.foreignWeb3.eth.getBlockNumber(),
            getGasPrice(this.config, true),
            getGasPrice(this.config, false),
        ])
            .then(([homeBlock, foreignBlock, homeGP, foreignGP]) =&gt; {
                logger.debug('Fetched homeBlock:', homeBlock, 'foreignBlock:', foreignBlock);
&nbsp;
                const { homeBlockLastRelayed, foreignBlockLastRelayed } = this.bridgeData;
                homeGasPrice = homeGP;
                foreignGasPrice = foreignGP;
&nbsp;
                homeFromBlock = homeBlockLastRelayed ? homeBlockLastRelayed + 1 : 0;
                homeToBlock = homeBlock - this.config.homeConfirmations;
                foreignFromBlock = foreignBlockLastRelayed ? foreignBlockLastRelayed + 1 : 0;
                foreignToBlock = foreignBlock - this.config.foreignConfirmations;
&nbsp;
                return Promise.all([
                    this.homeBridge.getRelayTransactions(homeFromBlock, homeToBlock),
                    this.foreignBridge.getRelayTransactions(foreignFromBlock, foreignToBlock),
                ])
                    .then(async ([toForeignTxs = <span class="branch-0 cbranch-no" title="branch not covered" >[],</span> toHomeTxs = <span class="branch-0 cbranch-no" title="branch not covered" >[]]</span>) =&gt; {
                        // now that we have the txs to relay, we persist the tx if it is not a duplicate
                        // and relay the tx.
&nbsp;
                        // we await for insertTxDataIfNew so we can syncrounously check for duplicate txs
                        const insertedForeignTxs = await Promise.all(
                            toForeignTxs.map(t =&gt; this.insertTxDataIfNew(t, false)),
                        );
                        const foreignPromises = insertedForeignTxs
                            .filter(tx =&gt; tx !== undefined)
                            .map(tx =&gt; this.sendForeignTx(tx, foreignGasPrice));
&nbsp;
                        const insertedHomeTxs = await Promise.all(
                            toHomeTxs.map(t =&gt; this.insertTxDataIfNew(t, true)),
                        );
                        const homePromises = insertedHomeTxs
                            .filter(tx =&gt; tx !== undefined)
                            .map(tx =&gt; this.sendHomeTx(tx, homeGasPrice));
&nbsp;
                        <span class="missing-if-branch" title="else path not taken" >E</span>if (this.config.isTest) {
                            return Promise.all([...foreignPromises, ...homePromises]);
                        }
                    })
                    .then(() =&gt; {
                        this.bridgeData.homeBlockLastRelayed = homeToBlock;
                        this.bridgeData.foreignBlockLastRelayed = foreignToBlock;
                        this.updateBridgeData(this.bridgeData);
                    })
                    .catch(<span class="fstat-no" title="function not covered" >er</span>r =&gt; {
<span class="cstat-no" title="statement not covered" >                        logger.error('Error occured -&gt;', err);</span>
<span class="cstat-no" title="statement not covered" >                        this.bridgeData.homeBlockLastRelayed = homeFromBlock;</span>
<span class="cstat-no" title="statement not covered" >                        this.bridgeData.foreignBlockLastRelayed = foreignFromBlock;</span>
<span class="cstat-no" title="statement not covered" >                        this.updateBridgeData(this.bridgeData);</span>
                    });
            })
            .catch(err =&gt; {
                // catch error fetching block or gasPrice
                logger.error('Error occured fetching blockNumbers or gasPrice -&gt;', err);
            })
            .finally(() =&gt; (this.pollingPromise = undefined));
&nbsp;
        return this.pollingPromise;
    }
&nbsp;
    loadBridgeData() {
        const bridgeData = Object.assign({}, BridgeData);
&nbsp;
        return new Promise((resolve, reject) =&gt; {
            this.db.bridge.findOne({}, (err, doc) =&gt; {
                <span class="missing-if-branch" title="if path not taken" >I</span>if (err) {
<span class="cstat-no" title="statement not covered" >                    logger.error('Error loading bridge-config.db');</span>
<span class="cstat-no" title="statement not covered" >                    reject(err);</span>
<span class="cstat-no" title="statement not covered" >                    process.exit();</span>
                }
&nbsp;
                <span class="missing-if-branch" title="else path not taken" >E</span>if (!doc) {
                    doc = {
                        homeContractAddress: this.config.homeBridge,
                        foreignContractAddress: this.config.foreignBridge,
                        homeBlockLastRelayed: this.config.homeBridgeDeployBlock,
                        foreignBlockLastRelayed: this.config.foreignBridgeDeployBlock,
                    };
                    this.updateBridgeData(doc);
                }
&nbsp;
                this.bridgeData = Object.assign(bridgeData, doc);
                resolve(this.bridgeData);
            });
        });
    }
&nbsp;
<span class="fstat-no" title="function not covered" >    re</span>layUnsentTxs() {
<span class="cstat-no" title="statement not covered" >        return Promise.all([getGasPrice(this.config, true), getGasPrice(this.config, false)])</span>
            .then(
<span class="fstat-no" title="function not covered" >                ([</span>homeGP, foreignGP]) =&gt;
<span class="cstat-no" title="statement not covered" >                    new Promise(<span class="fstat-no" title="function not covered" >re</span>solve =&gt; {</span>
<span class="cstat-no" title="statement not covered" >                        this.db.txs.find({ status: 'to-send' }, <span class="fstat-no" title="function not covered" >(e</span>rr, docs) =&gt; {</span>
<span class="cstat-no" title="statement not covered" >                            if (err) {</span>
<span class="cstat-no" title="statement not covered" >                                logger.error('Error loading to-send txs');</span>
<span class="cstat-no" title="statement not covered" >                                resolve();</span>
                            }
&nbsp;
                            const promises = <span class="cstat-no" title="statement not covered" >docs.map(</span>
<span class="fstat-no" title="function not covered" >                                tx</span> =&gt;
<span class="cstat-no" title="statement not covered" >                                    tx.toHomeBridge</span>
                                        ? this.sendHomeTx(tx, homeGP)
                                        : this.sendForeignTx(tx, foreignGP),
                            );
<span class="cstat-no" title="statement not covered" >                            Promise.all([...promises]).then(<span class="fstat-no" title="function not covered" >()</span> =&gt; <span class="cstat-no" title="statement not covered" >resolve())</span>;</span>
                        });
                    }),
            )
            .catch(<span class="fstat-no" title="function not covered" >er</span>r =&gt; {
<span class="cstat-no" title="statement not covered" >                logger.error('Error sending unsent txs', err);</span>
<span class="cstat-no" title="statement not covered" >                sendEmail(</span>
                    this.config,
                    `Error sending unsent txs \n\n${JSON.stringify(err, null, 2)}`,
                );
            });
    }
&nbsp;
    /**
     * Checks that this is a new tx. If new, we persist the tx and return the persisted object
     * with a generated _id. If this is a duplicate, we will send an error email for further
     * investigation and return undefined
     *
     * @param {*} data
     * @param {*} toHomeBridge
     */
    insertTxDataIfNew(data, toHomeBridge) {
        const tx = new Tx(undefined, toHomeBridge, data);
&nbsp;
        const query = toHomeBridge ? { foreignTx: tx.foreignTx } : { homeTx: tx.homeTx };
&nbsp;
        return new Promise((resolve, reject) =&gt; {
            this.db.txs.find(query, (err, docs) =&gt; {
                if (err || docs.length &gt; 0) {
                    sendEmail(
                        this.config,
                        `Ignoring duplicate tx. NEED TO INVESTIGATE\n\n ${JSON.stringify(
                            tx,
                            null,
                            2,
                        )}\n\n${JSON.stringify(err, null, 2)}`,
                    );
                    logger.error('Ignoring duplicate tx -&gt;', err, tx);
                    resolve();
                    return;
                }
&nbsp;
                this.db.txs.insert(tx, (err, doc) =&gt; {
                    <span class="missing-if-branch" title="if path not taken" >I</span>if (err) {
<span class="cstat-no" title="statement not covered" >                        logger.error('Error inserting bridge-txs.db -&gt;', err, data);</span>
<span class="cstat-no" title="statement not covered" >                        reject(error);</span>
                    }
                    resolve(doc);
                });
            });
        });
    }
&nbsp;
    updateTxData(data) {
        const { _id } = data;
        <span class="missing-if-branch" title="if path not taken" >I</span>if (!_id) <span class="cstat-no" title="statement not covered" >throw new Error('Attempting to update txData without an _id');</span>
        this.db.txs.update({ _id }, data, {}, err =&gt; {
            <span class="missing-if-branch" title="if path not taken" >I</span>if (err) {
<span class="cstat-no" title="statement not covered" >                logger.error('Error updating bridge-txs.db -&gt;', err, data);</span>
            }
        });
    }
&nbsp;
    updateBridgeData(data) {
        this.db.bridge.update({ _id: data._id }, data, { upsert: true }, err =&gt; {
            <span class="missing-if-branch" title="if path not taken" >I</span>if (err) <span class="cstat-no" title="statement not covered" >logger.error('Error updating bridge-config.db -&gt;', err, data);</span>
        });
    }
}
&nbsp;</pre></td></tr>
</table></pre>
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