@kaiachain/web3js-ext
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web3.js extension for kaiachain blockchain
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JavaScript
/*
This file is part of web3.js.
web3.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
web3.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with web3.js. If not, see <http://www.gnu.org/licenses/>.
*/
// Taken from https://github.com/web3/web3.js/blob/v4.3.0/packages/web3-eth/src/utils/watch_transaction_by_pooling.ts
import { transactionReceiptSchema } from "web3-eth";
import { ethRpcMethods } from "web3-rpc-methods";
import { format, numberToHex } from "web3-utils";
/**
* This function watches a Transaction by subscribing to new heads.
* It is used by `watchTransactionForConfirmations`, in case the provider does not support subscription.
* And it is also used by `watchTransactionBySubscription`, as a fallback, if the subscription failed for any reason.
*/
export const watchTransactionByPolling = ({ web3Context, transactionReceipt, transactionPromiEvent, returnFormat, }) => {
// Having a transactionReceipt means that the transaction has already been included
// in at least one block, so we start with 1
let confirmations = 1;
const intervalId = setInterval(() => {
(async () => {
if (confirmations >= web3Context.transactionConfirmationBlocks) {
clearInterval(intervalId);
}
const nextBlock = await ethRpcMethods.getBlockByNumber(web3Context.requestManager, numberToHex(BigInt(transactionReceipt.blockNumber) + BigInt(confirmations)), false);
if (nextBlock?.hash) {
confirmations += 1;
transactionPromiEvent.emit("confirmation", {
confirmations: format({ format: "uint" }, confirmations, returnFormat),
receipt: format(transactionReceiptSchema, transactionReceipt, returnFormat),
latestBlockHash: format({ format: "bytes32" }, nextBlock.hash, returnFormat),
});
}
})();
}, web3Context.transactionReceiptPollingInterval ?? web3Context.transactionPollingInterval);
};