76 lines
2.2 KiB
TypeScript
76 lines
2.2 KiB
TypeScript
// From https://github.com/MyCryptoHQ/MyCrypto/blob/develop/common/libs/units.ts
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import BN from 'bn.js';
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import { stripHexPrefix } from 'utils/formatters';
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export const ZCASH_DECIMAL = 8;
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export const Units = {
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zat: '1',
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zcash: '100000000',
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};
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export type Zat = BN;
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export type Usd = BN;
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export type UnitKey = keyof typeof Units;
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export const handleValues = (input: string | BN) => {
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if (typeof input === 'string') {
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return input.startsWith('0x') ? new BN(stripHexPrefix(input), 16) : new BN(input);
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}
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if (typeof input === 'number') {
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return new BN(input);
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}
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if (BN.isBN(input)) {
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return input;
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} else {
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throw Error('unsupported value conversion');
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}
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};
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export const Zat = (input: string | BN): Zat => handleValues(input);
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const stripRightZeros = (str: string) => {
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const strippedStr = str.replace(/0+$/, '');
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return strippedStr === '' ? null : strippedStr;
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};
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export const baseToConvertedUnit = (value: string, decimal: number) => {
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if (decimal === 0) {
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return value;
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}
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const paddedValue = value.padStart(decimal + 1, '0'); // 0.1 ==>
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const integerPart = paddedValue.slice(0, -decimal);
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const fractionPart = stripRightZeros(paddedValue.slice(-decimal));
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return fractionPart ? `${integerPart}.${fractionPart}` : `${integerPart}`;
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};
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const convertedToBaseUnit = (value: string, decimal: number) => {
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if (decimal === 0) {
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return value;
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}
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const [integerPart, fractionPart = ''] = value.split('.');
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const paddedFraction = fractionPart.padEnd(decimal, '0');
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return `${integerPart}${paddedFraction}`;
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};
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export const fromZat = (zat: Zat) => {
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return baseToConvertedUnit(zat.toString(), ZCASH_DECIMAL);
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};
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export const toZat = (value: string | number): Zat => {
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value = value.toString();
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const zat = convertedToBaseUnit(value, ZCASH_DECIMAL);
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return Zat(zat);
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};
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export const toUsd = (value: string | number): Usd => {
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value = value.toString();
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const hasDecimal = value.indexOf('.') !== -1;
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// decimals aren't allowed for proposal targets,
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// but remove decimal if it exists
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value = hasDecimal ? value.split('.')[0] : value;
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return new BN(value, 10);
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};
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export const getDecimalFromUnitKey = (key: UnitKey) => Units[key].length - 1;
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