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Текущая директория: /var/www/bitcardoApp/node_modules/ethers/lib.commonjs/utils
Просмотр файла: units.js
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseEther = exports.formatEther = exports.parseUnits = exports.formatUnits = void 0;
/**
* Most interactions with Ethereum requires integer values, which use
* the smallest magnitude unit.
*
* For example, imagine dealing with dollars and cents. Since dollars
* are divisible, non-integer values are possible, such as ``$10.77``.
* By using the smallest indivisible unit (i.e. cents), the value can
* be kept as the integer ``1077``.
*
* When receiving decimal input from the user (as a decimal string),
* the value should be converted to an integer and when showing a user
* a value, the integer value should be converted to a decimal string.
*
* This creates a clear distinction, between values to be used by code
* (integers) and values used for display logic to users (decimals).
*
* The native unit in Ethereum, //ether// is divisible to 18 decimal places,
* where each individual unit is called a //wei//.
*
* @_subsection api/utils:Unit Conversion [about-units]
*/
const errors_js_1 = require("./errors.js");
const fixednumber_js_1 = require("./fixednumber.js");
const maths_js_1 = require("./maths.js");
const names = [
"wei",
"kwei",
"mwei",
"gwei",
"szabo",
"finney",
"ether",
];
/**
* Converts %%value%% into a //decimal string//, assuming %%unit%% decimal
* places. The %%unit%% may be the number of decimal places or the name of
* a unit (e.g. ``"gwei"`` for 9 decimal places).
*
*/
function formatUnits(value, unit) {
let decimals = 18;
if (typeof (unit) === "string") {
const index = names.indexOf(unit);
(0, errors_js_1.assertArgument)(index >= 0, "invalid unit", "unit", unit);
decimals = 3 * index;
}
else if (unit != null) {
decimals = (0, maths_js_1.getNumber)(unit, "unit");
}
return fixednumber_js_1.FixedNumber.fromValue(value, decimals, { decimals, width: 512 }).toString();
}
exports.formatUnits = formatUnits;
/**
* Converts the //decimal string// %%value%% to a BigInt, assuming
* %%unit%% decimal places. The %%unit%% may the number of decimal places
* or the name of a unit (e.g. ``"gwei"`` for 9 decimal places).
*/
function parseUnits(value, unit) {
(0, errors_js_1.assertArgument)(typeof (value) === "string", "value must be a string", "value", value);
let decimals = 18;
if (typeof (unit) === "string") {
const index = names.indexOf(unit);
(0, errors_js_1.assertArgument)(index >= 0, "invalid unit", "unit", unit);
decimals = 3 * index;
}
else if (unit != null) {
decimals = (0, maths_js_1.getNumber)(unit, "unit");
}
return fixednumber_js_1.FixedNumber.fromString(value, { decimals, width: 512 }).value;
}
exports.parseUnits = parseUnits;
/**
* Converts %%value%% into a //decimal string// using 18 decimal places.
*/
function formatEther(wei) {
return formatUnits(wei, 18);
}
exports.formatEther = formatEther;
/**
* Converts the //decimal string// %%ether%% to a BigInt, using 18
* decimal places.
*/
function parseEther(ether) {
return parseUnits(ether, 18);
}
exports.parseEther = parseEther;
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