6801 Fill gas price when baseFeePerGas==='0x0'

packages/web3-eth/src/utils/get_transaction_gas_pricing.ts

@@ -38,14 +38,17 @@ async function getEip1559GasPricing<ReturnFormat extends DataFormat>(
 	web3Context: Web3Context<EthExecutionAPI>,
 	returnFormat: ReturnFormat,
 ): Promise<FormatType<{ maxPriorityFeePerGas?: Numbers; maxFeePerGas?: Numbers }, ReturnFormat>> {
-	const block = await getBlock(web3Context, web3Context.defaultBlock, false, returnFormat);
-
+	const block = await getBlock(web3Context, web3Context.defaultBlock, false, ETH_DATA_FORMAT);
 	if (isNullish(block.baseFeePerGas)) throw new Eip1559NotSupportedError();
 
-	if (!isNullish(transaction.gasPrice)) {
+	let gasPrice: Numbers | undefined;
+	if (isNullish(transaction.gasPrice) && BigInt(block.baseFeePerGas) === BigInt(0)) {
+		gasPrice = await getGasPrice(web3Context, returnFormat);
+	}
+	if (!isNullish(transaction.gasPrice) || !isNullish(gasPrice)) {
 		const convertedTransactionGasPrice = format(
 			{ format: 'uint' },
-			transaction.gasPrice as Numbers,
+			transaction.gasPrice ?? gasPrice,
 			returnFormat,
 		);
 

packages/web3-eth/test/unit/utils/get_transaction_gas_pricing.test.ts

@@ -0,0 +1,58 @@
+/*
+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/>.
+*/
+import { Web3Context } from 'web3-core';
+
+import { FMT_BYTES, FMT_NUMBER } from 'web3-types';
+import * as RpcMethodWrappers from '../../../src/rpc_method_wrappers';
+import { getTransactionGasPricing } from '../../../src/utils/get_transaction_gas_pricing';
+
+describe('getTransactionGasPricing', () => {
+	const web3Context = new Web3Context();
+
+	it('should use the call rpc wrapper', async () => {
+		const gasPrice = '0x123456';
+		const gasPriceSpy = jest
+			.spyOn(RpcMethodWrappers, 'getGasPrice')
+			.mockImplementation(async () => gasPrice);
+		const getBlockSpy = jest
+			.spyOn(RpcMethodWrappers, 'getBlock')
+			// @ts-expect-error only for testing purposes
+			.mockImplementation(async () => ({
+				baseFeePerGas: '0x0',
+			}));
+
+		const transaction = {
+			from: '0x4fec0a51024b13030d26e70904b066c6d41157a5',
+			to: '0x36361143b7e2c676f8ccd67743a89d26437f0529',
+			data: '0x819f48fe',
+			type: '0x2',
+		};
+
+		const res = await getTransactionGasPricing(transaction, web3Context, {
+			number: FMT_NUMBER.HEX,
+			bytes: FMT_BYTES.HEX,
+		});
+
+		expect(getBlockSpy).toHaveBeenCalled();
+		expect(gasPriceSpy).toHaveBeenCalled();
+		expect(res).toEqual({
+			gasPrice: undefined,
+			maxPriorityFeePerGas: gasPrice,
+			maxFeePerGas: gasPrice,
+		});
+	});
+});