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import * as _ from 'lodash';
import { BigNumber } from './configured_bignumber';
// tslint:disable:restrict-plus-operands
export const formatUtils = {
isBigNumber(value: any): boolean {
const isBigNumber = _.isObject(value) && value.isBigNumber;
return isBigNumber;
},
convertHexToNumber(value: string): number {
const valueBigNumber = new BigNumber(value);
const valueNumber = valueBigNumber.toNumber();
return valueNumber;
},
convertHexToNumberOrNull(hex: string | null): number | null {
if (_.isNull(hex)) {
return null;
}
const decimal = this.convertHexToNumber(hex);
return decimal;
},
convertAmountToBigNumber(value: string | number | BigNumber): BigNumber {
const num = value || 0;
const isBigNumber = formatUtils.isBigNumber(num);
if (isBigNumber) {
return num as BigNumber;
}
if (_.isString(num) && (num.indexOf('0x') === 0 || num.indexOf('-0x') === 0)) {
return new BigNumber(num.replace('0x', ''), 16);
}
const baseTen = 10;
return new BigNumber((num as number).toString(baseTen), baseTen);
},
encodeAmountAsHexString(value: string | number | BigNumber): string {
const valueBigNumber = formatUtils.convertAmountToBigNumber(value);
const hexBase = 16;
const valueHex = valueBigNumber.toString(hexBase);
return valueBigNumber.lessThan(0) ? '-0x' + valueHex.substr(1) : '0x' + valueHex;
},
numberToHex(value: number): string {
if (!isFinite(value) && !this.isHexStrict(value)) {
throw new Error(`Given input ${value} is not a number.`);
}
const valueBigNumber = new BigNumber(value);
const hexBase = 16;
const result = valueBigNumber.toString(hexBase);
return valueBigNumber.lt(0) ? '-0x' + result.substr(1) : '0x' + result;
},
isHexStrict(hex: string | number): boolean {
return (
(_.isString(hex) || _.isNumber(hex)) && /^(-)?0x[0-9a-f]*$/i.test(_.isNumber(hex) ? hex.toString() : hex)
);
},
};
// tslint:enable:restrict-plus-operands
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