@vechain.energy/gas/dist/intrinsic.js

calculate estimated gas usage for transactions

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = intrinsic;
const constants_1 = require("./constants");
function intrinsic(clauses) {
    return clauses.reduce((sum, c) => {
        sum += c.to === null ? constants_1.CLAUSE_GAS_CONTRACT_CREATION : constants_1.CLAUSE_GAS;
        sum += dataGas(c.data);
        return sum;
    }, constants_1.TX_GAS);
}
function dataGas(data) {
    if (data === undefined) {
        return 0;
    }
    const bytes = data.slice(2).match(/.{1,2}/g);
    if (bytes === null) {
        return 0;
    }
    const amountZeroBytes = bytes.reduce((amountZeroBytes, byte) => amountZeroBytes + (byte === '00' ? 1 : 0), 0);
    const amountNonZeroBytes = bytes.length - amountZeroBytes;
    return (amountNonZeroBytes * constants_1.NON_ZERO_BYTES_GAS) + (amountZeroBytes * constants_1.ZERO_BYTES_GAS);
}