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metamask-extension/ui/hooks/gasFeeInput/useMaxFeePerGasInput.js

143 lines
4.3 KiB
JavaScript

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