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39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
const { network } = require('hardhat');
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const { promisify } = require('util');
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const queue = promisify(setImmediate);
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async function countPendingTransactions() {
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return parseInt(await network.provider.send('eth_getBlockTransactionCountByNumber', ['pending']));
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}
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async function batchInBlock(txs) {
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try {
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// disable auto-mining
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await network.provider.send('evm_setAutomine', [false]);
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// send all transactions
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const promises = txs.map(fn => fn());
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// wait for node to have all pending transactions
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while (txs.length > (await countPendingTransactions())) {
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await queue();
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}
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// mine one block
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await network.provider.send('evm_mine');
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// fetch receipts
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const receipts = await Promise.all(promises);
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// Sanity check, all tx should be in the same block
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const minedBlocks = new Set(receipts.map(({ receipt }) => receipt.blockNumber));
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expect(minedBlocks.size).to.equal(1);
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return receipts;
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} finally {
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// enable auto-mining
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await network.provider.send('evm_setAutomine', [true]);
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}
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}
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module.exports = {
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countPendingTransactions,
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batchInBlock,
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};
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