mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-12-23 09:52:26 +01:00
129 lines
4.0 KiB
JavaScript
129 lines
4.0 KiB
JavaScript
import { useEffect, useState } from 'react';
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import { useSelector } from 'react-redux';
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import { GAS_ESTIMATE_TYPES } from '../../../shared/constants/gas';
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import { SECONDARY } from '../../helpers/constants/common';
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import { getMaximumGasTotalInHexWei } from '../../../shared/modules/gas.utils';
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import {
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decGWEIToHexWEI,
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decimalToHex,
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hexWEIToDecGWEI,
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} from '../../helpers/utils/conversions.util';
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import {
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checkNetworkAndAccountSupports1559,
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getShouldShowFiat,
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} from '../../selectors';
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import { isLegacyTransaction } from '../../helpers/utils/transactions.util';
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import { useCurrencyDisplay } from '../useCurrencyDisplay';
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import { useUserPreferencedCurrency } from '../useUserPreferencedCurrency';
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import { feeParamsAreCustom, getGasFeeEstimate } from './utils';
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const getMaxFeePerGasFromTransaction = (transaction) => {
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const { maxFeePerGas, gasPrice } = transaction?.txParams || {};
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return Number(hexWEIToDecGWEI(maxFeePerGas || gasPrice));
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};
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/**
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* @typedef {Object} MaxFeePerGasInputReturnType
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* @property {(DecGweiString) => void} setMaxFeePerGas - state setter method to
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* update the maxFeePerGas.
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* @property {string} [maxFeePerGasFiat] - the maxFeePerGas converted to the
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* user's preferred currency.
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* @property {(DecGweiString) => void} setMaxFeePerGas - state setter
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* method to update the setMaxFeePerGas.
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*/
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export function useMaxFeePerGasInput({
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estimateToUse,
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gasEstimateType,
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gasFeeEstimates,
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gasLimit,
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gasPrice,
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supportsEIP1559V2,
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transaction,
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}) {
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const supportsEIP1559 =
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useSelector(checkNetworkAndAccountSupports1559) &&
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!isLegacyTransaction(transaction?.txParams);
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const {
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currency: fiatCurrency,
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numberOfDecimals: fiatNumberOfDecimals,
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} = useUserPreferencedCurrency(SECONDARY);
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const showFiat = useSelector(getShouldShowFiat);
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const initialMaxFeePerGas = supportsEIP1559
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? getMaxFeePerGasFromTransaction(transaction)
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: 0;
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// This hook keeps track of a few pieces of transitional state. It is
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// transitional because it is only used to modify a transaction in the
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// metamask (background) state tree.
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const [maxFeePerGas, setMaxFeePerGas] = useState(() => {
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if (initialMaxFeePerGas && feeParamsAreCustom(transaction))
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return initialMaxFeePerGas;
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return null;
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});
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useEffect(() => {
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if (supportsEIP1559V2 && initialMaxFeePerGas) {
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setMaxFeePerGas(initialMaxFeePerGas);
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}
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}, [initialMaxFeePerGas, setMaxFeePerGas, supportsEIP1559V2]);
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let gasSettings = {
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gasLimit: decimalToHex(gasLimit),
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};
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if (supportsEIP1559) {
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gasSettings = {
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...gasSettings,
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maxFeePerGas: decGWEIToHexWEI(maxFeePerGas || gasPrice || '0'),
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};
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} else if (gasEstimateType === GAS_ESTIMATE_TYPES.NONE) {
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gasSettings = {
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...gasSettings,
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gasPrice: '0x0',
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};
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} else {
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gasSettings = {
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...gasSettings,
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gasPrice: decGWEIToHexWEI(gasPrice),
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};
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}
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const maximumCostInHexWei = getMaximumGasTotalInHexWei(gasSettings);
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// We need to display thee estimated fiat currency impact of the maxFeePerGas
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// field to the user. This hook calculates that amount. This also works for
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// the gasPrice amount because in legacy transactions cost is always gasPrice
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// * gasLimit.
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const [, { value: maxFeePerGasFiat }] = useCurrencyDisplay(
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maximumCostInHexWei,
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{
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numberOfDecimals: fiatNumberOfDecimals,
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currency: fiatCurrency,
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},
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);
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// We specify whether to use the estimate value by checking if the state
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// value has been set. The state value is only set by user input and is wiped
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// when the user selects an estimate. Default here is '0' to avoid bignumber
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// errors in later calculations for nullish values.
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const maxFeePerGasToUse =
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maxFeePerGas ??
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getGasFeeEstimate(
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'suggestedMaxFeePerGas',
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gasFeeEstimates,
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gasEstimateType,
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estimateToUse,
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initialMaxFeePerGas || 0,
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);
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return {
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maxFeePerGas: maxFeePerGasToUse,
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maxFeePerGasFiat: showFiat ? maxFeePerGasFiat : '',
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setMaxFeePerGas,
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};
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}
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