@ton/core
Version:
Core TypeScript library that implements low level primitives for TON blockchain.
93 lines (92 loc) • 2.54 kB
JavaScript
;
/**
* Copyright (c) Whales Corp.
* All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.fromNano = exports.toNano = void 0;
function toNano(src) {
if (typeof src === 'bigint') {
return src * 1000000000n;
}
else {
if (typeof src === 'number') {
if (!Number.isFinite(src)) {
throw Error('Invalid number');
}
if (Math.log10(src) <= 6) {
src = src.toLocaleString('en', { minimumFractionDigits: 9, useGrouping: false });
}
else if (src - Math.trunc(src) === 0) {
src = src.toLocaleString('en', { maximumFractionDigits: 0, useGrouping: false });
}
else {
throw Error('Not enough precision for a number value. Use string value instead');
}
}
// Check sign
let neg = false;
while (src.startsWith('-')) {
neg = !neg;
src = src.slice(1);
}
// Split string
if (src === '.') {
throw Error('Invalid number');
}
let parts = src.split('.');
if (parts.length > 2) {
throw Error('Invalid number');
}
// Prepare parts
let whole = parts[0];
let frac = parts[1];
if (!whole) {
whole = '0';
}
if (!frac) {
frac = '0';
}
if (frac.length > 9) {
throw Error('Invalid number');
}
while (frac.length < 9) {
frac += '0';
}
// Convert
let r = BigInt(whole) * 1000000000n + BigInt(frac);
if (neg) {
r = -r;
}
return r;
}
}
exports.toNano = toNano;
function fromNano(src) {
let v = BigInt(src);
let neg = false;
if (v < 0) {
neg = true;
v = -v;
}
// Convert fraction
let frac = v % 1000000000n;
let facStr = frac.toString();
while (facStr.length < 9) {
facStr = '0' + facStr;
}
facStr = facStr.match(/^([0-9]*[1-9]|0)(0*)/)[1];
// Convert whole
let whole = v / 1000000000n;
let wholeStr = whole.toString();
// Value
let value = `${wholeStr}${facStr === '0' ? '' : `.${facStr}`}`;
if (neg) {
value = '-' + value;
}
return value;
}
exports.fromNano = fromNano;