ethers.js/packages/solidity/lib.esm/index.js

"use strict";
import { BigNumber } from "@ethersproject/bignumber";
import { arrayify, concat, hexlify, zeroPad } from "@ethersproject/bytes";
import { keccak256 as hashKeccak256 } from "@ethersproject/keccak256";
import { sha256 as hashSha256 } from "@ethersproject/sha2";
import { toUtf8Bytes } from "@ethersproject/strings";
const regexBytes = new RegExp("^bytes([0-9]+)$");
const regexNumber = new RegExp("^(u?int)([0-9]*)$");
const regexArray = new RegExp("^(.*)\\[([0-9]*)\\]$");
const Zeros = "0000000000000000000000000000000000000000000000000000000000000000";
function _pack(type, value, isArray) {
    switch (type) {
        case "address":
            if (isArray) {
                return zeroPad(value, 32);
            }
            return arrayify(value);
        case "string":
            return toUtf8Bytes(value);
        case "bytes":
            return arrayify(value);
        case "bool":
            value = (value ? "0x01" : "0x00");
            if (isArray) {
                return zeroPad(value, 32);
            }
            return arrayify(value);
    }
    let match = type.match(regexNumber);
    if (match) {
        //let signed = (match[1] === "int")
        let size = parseInt(match[2] || "256");
        if ((size % 8 != 0) || size === 0 || size > 256) {
            throw new Error("invalid number type - " + type);
        }
        if (isArray) {
            size = 256;
        }
        value = BigNumber.from(value).toTwos(size);
        return zeroPad(value, size / 8);
    }
    match = type.match(regexBytes);
    if (match) {
        const size = parseInt(match[1]);
        if (String(size) != match[1] || size === 0 || size > 32) {
            throw new Error("invalid number type - " + type);
        }
        if (arrayify(value).byteLength !== size) {
            throw new Error("invalid value for " + type);
        }
        if (isArray) {
            return arrayify((value + Zeros).substring(0, 66));
        }
        return value;
    }
    match = type.match(regexArray);
    if (match && Array.isArray(value)) {
        const baseType = match[1];
        const count = parseInt(match[2] || String(value.length));
        if (count != value.length) {
            throw new Error("invalid value for " + type);
        }
        const result = [];
        value.forEach(function (value) {
            result.push(_pack(baseType, value, true));
        });
        return concat(result);
    }
    throw new Error("unknown type - " + type);
}
// @TODO: Array Enum
export function pack(types, values) {
    if (types.length != values.length) {
        throw new Error("type/value count mismatch");
    }
    const tight = [];
    types.forEach(function (type, index) {
        tight.push(_pack(type, values[index]));
    });
    return hexlify(concat(tight));
}
export function keccak256(types, values) {
    return hashKeccak256(pack(types, values));
}
export function sha256(types, values) {
    return hashSha256(pack(types, values));
}