56 lines
1.5 KiB
TypeScript
56 lines
1.5 KiB
TypeScript
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import { base58btc } from "multiformats/bases/base58";
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import { bytesToHex, hexToBytes, utf8ToBytes } from "@noble/hashes/utils";
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import { base32 } from "multiformats/bases/base32";
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import { base64, base64url } from "multiformats/bases/base64";
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export default abstract class Multibase {
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abstract toBytes(): Uint8Array;
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static decodeString(data: string): Uint8Array {
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let bytes: Uint8Array;
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if (data[0] === "z") {
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bytes = base58btc.decode(data);
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} else if (data[0] === "f") {
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bytes = Uint8Array.from(hexToBytes(data.substring(1)));
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} else if (data[0] === "b") {
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let str = data.substring(1).toUpperCase();
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while (str.length % 4 !== 0) {
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str += "=";
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}
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bytes = base32.decode(str);
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} else if (data[0] === "u") {
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let str = data.substring(1);
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while (str.length % 4 !== 0) {
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str += "=";
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}
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bytes = base64url.decode(str);
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} else if (data[0] === ":") {
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bytes = utf8ToBytes(data);
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} else {
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throw new Error(`Multibase encoding ${data[0]} not supported`);
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}
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return bytes;
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}
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toHex(): string {
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return `f${bytesToHex(this.toBytes())}`;
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}
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toBase32(): string {
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return `b${base32.encode(this.toBytes()).replace(/=/g, "").toLowerCase()}`;
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}
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toBase64Url(): string {
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return `u${base64.encode(this.toBytes())}`;
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}
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toBase58(): string {
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return `z${base58btc.encode(this.toBytes())}`;
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}
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toString(): string {
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return this.toBase58();
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}
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}
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