85 lines
2.4 KiB
TypeScript
85 lines
2.4 KiB
TypeScript
"use strict";
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import { BigNumber, BigNumberish } from "@ethersproject/bignumber";
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import { formatFixed, parseFixed } from "@ethersproject/bignumber";
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import { Logger } from "@ethersproject/logger";
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import { version } from "./_version";
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const logger = new Logger(version);
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const names = [
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"wei",
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"kwei",
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"mwei",
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"gwei",
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"szabo",
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"finney",
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"ether",
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];
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// Some environments have issues with RegEx that contain back-tracking, so we cannot
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// use them.
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export function commify(value: string | number): string {
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let comps = String(value).split(".");
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if (comps.length > 2 || !comps[0].match(/^-?[0-9]*$/) || (comps[1] && !comps[1].match(/^[0-9]*$/)) || value === "." || value === "-.") {
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logger.throwArgumentError("invalid value", "value", value);
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}
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// Make sure we have at least one whole digit (0 if none)
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let whole = comps[0];
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let negative = "";
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if (whole.substring(0, 1) === "-") {
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negative = "-";
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whole = whole.substring(1);
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}
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// Make sure we have at least 1 whole digit with no leading zeros
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while (whole.substring(0, 1) === "0") { whole = whole.substring(1); }
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if (whole === "") { whole = "0"; }
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let suffix = "";
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if (comps.length === 2) { suffix = "." + (comps[1] || "0"); }
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let formatted = [];
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while (whole.length) {
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if (whole.length <= 3) {
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formatted.unshift(whole);
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break;
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} else {
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let index = whole.length - 3;
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formatted.unshift(whole.substring(index));
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whole = whole.substring(0, index);
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}
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}
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return negative + formatted.join(",") + suffix;
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}
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export function formatUnits(value: BigNumberish, unitName?: string | BigNumberish): string {
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if (typeof(unitName) === "string") {
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let index = names.indexOf(unitName);
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if (index !== -1) { unitName = 3 * index; }
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}
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return formatFixed(value, (unitName != null) ? unitName: 18);
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}
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export function parseUnits(value: string, unitName?: BigNumberish): BigNumber {
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if (typeof(unitName) === "string") {
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let index = names.indexOf(unitName);
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if (index !== -1) { unitName = 3 * index; }
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}
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return parseFixed(value, (unitName != null) ? unitName: 18);
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}
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export function formatEther(wei: BigNumberish): string {
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return formatUnits(wei, 18);
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}
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export function parseEther(ether: string): BigNumber {
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return parseUnits(ether, 18);
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}
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