ethers.js/packages/bignumber/lib/bignumber.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 *  BigNumber
 *
 *  A wrapper around the BN.js object. We use the BN.js library
 *  because it is used by elliptic, so it is required regardles.
 *
 */
var bn_js_1 = require("bn.js");
var bytes_1 = require("@ethersproject/bytes");
var logger_1 = require("@ethersproject/logger");
var _version_1 = require("./_version");
var logger = new logger_1.Logger(_version_1.version);
var _constructorGuard = {};
var MAX_SAFE = 0x1fffffffffffff;
function isBigNumberish(value) {
    return (value != null) && (BigNumber.isBigNumber(value) ||
        (typeof (value) === "number" && (value % 1) === 0) ||
        (typeof (value) === "string" && !!value.match(/^-?[0-9]+$/)) ||
        bytes_1.isHexString(value) ||
        (typeof (value) === "bigint") ||
        bytes_1.isBytes(value));
}
exports.isBigNumberish = isBigNumberish;
var BigNumber = /** @class */ (function () {
    function BigNumber(constructorGuard, hex) {
        var _newTarget = this.constructor;
        logger.checkNew(_newTarget, BigNumber);
        if (constructorGuard !== _constructorGuard) {
            logger.throwError("cannot call consturtor directly; use BigNumber.from", logger_1.Logger.errors.UNSUPPORTED_OPERATION, {
                operation: "new (BigNumber)"
            });
        }
        this._hex = hex;
        this._isBigNumber = true;
        Object.freeze(this);
    }
    BigNumber.prototype.fromTwos = function (value) {
        return toBigNumber(toBN(this).fromTwos(value));
    };
    BigNumber.prototype.toTwos = function (value) {
        return toBigNumber(toBN(this).toTwos(value));
    };
    BigNumber.prototype.abs = function () {
        if (this._hex[0] === "-") {
            return BigNumber.from(this._hex.substring(1));
        }
        return this;
    };
    BigNumber.prototype.add = function (other) {
        return toBigNumber(toBN(this).add(toBN(other)));
    };
    BigNumber.prototype.sub = function (other) {
        return toBigNumber(toBN(this).sub(toBN(other)));
    };
    BigNumber.prototype.div = function (other) {
        var o = BigNumber.from(other);
        if (o.isZero()) {
            throwFault("division by zero", "div");
        }
        return toBigNumber(toBN(this).div(toBN(other)));
    };
    BigNumber.prototype.mul = function (other) {
        return toBigNumber(toBN(this).mul(toBN(other)));
    };
    BigNumber.prototype.mod = function (other) {
        return toBigNumber(toBN(this).mod(toBN(other)));
    };
    BigNumber.prototype.pow = function (other) {
        return toBigNumber(toBN(this).pow(toBN(other)));
    };
    BigNumber.prototype.maskn = function (value) {
        return toBigNumber(toBN(this).maskn(value));
    };
    BigNumber.prototype.eq = function (other) {
        return toBN(this).eq(toBN(other));
    };
    BigNumber.prototype.lt = function (other) {
        return toBN(this).lt(toBN(other));
    };
    BigNumber.prototype.lte = function (other) {
        return toBN(this).lte(toBN(other));
    };
    BigNumber.prototype.gt = function (other) {
        return toBN(this).gt(toBN(other));
    };
    BigNumber.prototype.gte = function (other) {
        return toBN(this).gte(toBN(other));
    };
    BigNumber.prototype.isZero = function () {
        return toBN(this).isZero();
    };
    BigNumber.prototype.toNumber = function () {
        try {
            return toBN(this).toNumber();
        }
        catch (error) {
            throwFault("overflow", "toNumber", this.toString());
        }
        return null;
    };
    BigNumber.prototype.toString = function () {
        // Lots of people expect this, which we do not support, so check
        if (arguments.length !== 0) {
            logger.throwError("bigNumber.toString does not accept parameters", logger_1.Logger.errors.UNEXPECTED_ARGUMENT, {});
        }
        return toBN(this).toString(10);
    };
    BigNumber.prototype.toHexString = function () {
        return this._hex;
    };
    BigNumber.from = function (value) {
        if (value instanceof BigNumber) {
            return value;
        }
        if (typeof (value) === "string") {
            if (value.match(/-?0x[0-9a-f]+/i)) {
                return new BigNumber(_constructorGuard, toHex(value));
            }
            if (value.match(/^-?[0-9]+$/)) {
                return new BigNumber(_constructorGuard, toHex(new bn_js_1.BN(value)));
            }
            return logger.throwArgumentError("invalid BigNumber string", "value", value);
        }
        if (typeof (value) === "number") {
            if (value % 1) {
                throwFault("underflow", "BigNumber.from", value);
            }
            if (value >= MAX_SAFE || value <= -MAX_SAFE) {
                throwFault("overflow", "BigNumber.from", value);
            }
            return BigNumber.from(String(value));
        }
        if (typeof (value) === "bigint") {
            return BigNumber.from(value.toString());
        }
        if (bytes_1.isBytes(value)) {
            return BigNumber.from(bytes_1.hexlify(value));
        }
        if (value._hex && bytes_1.isHexString(value._hex)) {
            return BigNumber.from(value._hex);
        }
        if (value.toHexString) {
            value = value.toHexString();
            if (typeof (value) === "string") {
                return BigNumber.from(value);
            }
        }
        return logger.throwArgumentError("invalid BigNumber value", "value", value);
    };
    BigNumber.isBigNumber = function (value) {
        return !!(value && value._isBigNumber);
    };
    return BigNumber;
}());
exports.BigNumber = BigNumber;
// Normalize the hex string
function toHex(value) {
    // For BN, call on the hex string
    if (typeof (value) !== "string") {
        return toHex(value.toString(16));
    }
    // If negative, prepend the negative sign to the normalized positive value
    if (value[0] === "-") {
        // Strip off the negative sign
        value = value.substring(1);
        // Cannot have mulitple negative signs (e.g. "--0x04")
        if (value[0] === "-") {
            logger.throwArgumentError("invalid hex", "value", value);
        }
        // Call toHex on the positive component
        value = toHex(value);
        // Do not allow "-0x00"
        if (value === "0x00") {
            return value;
        }
        // Negate the value
        return "-" + value;
    }
    // Add a "0x" prefix if missing
    if (value.substring(0, 2) !== "0x") {
        value = "0x" + value;
    }
    // Normalize zero
    if (value === "0x") {
        return "0x00";
    }
    // Make the string even length
    if (value.length % 2) {
        value = "0x0" + value.substring(2);
    }
    // Trim to smallest even-length string
    while (value.length > 4 && value.substring(0, 4) === "0x00") {
        value = "0x" + value.substring(4);
    }
    return value;
}
function toBigNumber(value) {
    return BigNumber.from(toHex(value));
}
function toBN(value) {
    var hex = BigNumber.from(value).toHexString();
    if (hex[0] === "-") {
        return (new bn_js_1.BN("-" + hex.substring(3), 16));
    }
    return new bn_js_1.BN(hex.substring(2), 16);
}
function throwFault(fault, operation, value) {
    var params = { fault: fault, operation: operation };
    if (value != null) {
        params.value = value;
    }
    return logger.throwError(fault, logger_1.Logger.errors.NUMERIC_FAULT, params);
}