@ethereumjs/tx/dist/esm/capabilities/eip1559.js

Implementation of the various Ethereum Transaction Types

import { EthereumJSErrorWithoutCode } from '@ethereumjs/util';
export function getUpfrontCost(tx, baseFee) {
    const prio = tx.maxPriorityFeePerGas;
    const maxBase = tx.maxFeePerGas - baseFee;
    const inclusionFeePerGas = prio < maxBase ? prio : maxBase;
    const gasPrice = inclusionFeePerGas + baseFee;
    return tx.gasLimit * gasPrice + tx.value;
}
export function getEffectivePriorityFee(tx, baseFee) {
    if (baseFee === undefined || baseFee > tx.maxFeePerGas) {
        throw EthereumJSErrorWithoutCode('Tx cannot pay baseFee');
    }
    // The remaining fee for the coinbase, which can take up to this value, capped at `maxPriorityFeePerGas`
    const remainingFee = tx.maxFeePerGas - baseFee;
    return tx.maxPriorityFeePerGas < remainingFee ? tx.maxPriorityFeePerGas : remainingFee;
}
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