arweave
Version:
Arweave JS client library
75 lines (74 loc) • 2.38 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.concatBuffers = concatBuffers;
exports.b64UrlToString = b64UrlToString;
exports.bufferToString = bufferToString;
exports.stringToBuffer = stringToBuffer;
exports.stringToB64Url = stringToB64Url;
exports.b64UrlToBuffer = b64UrlToBuffer;
exports.bufferTob64 = bufferTob64;
exports.bufferTob64Url = bufferTob64Url;
exports.b64UrlEncode = b64UrlEncode;
exports.b64UrlDecode = b64UrlDecode;
const B64js = require("base64-js");
function concatBuffers(buffers) {
let total_length = 0;
for (let i = 0; i < buffers.length; i++) {
total_length += buffers[i].byteLength;
}
let temp = new Uint8Array(total_length);
let offset = 0;
temp.set(new Uint8Array(buffers[0]), offset);
offset += buffers[0].byteLength;
for (let i = 1; i < buffers.length; i++) {
temp.set(new Uint8Array(buffers[i]), offset);
offset += buffers[i].byteLength;
}
return temp;
}
function b64UrlToString(b64UrlString) {
let buffer = b64UrlToBuffer(b64UrlString);
return bufferToString(buffer);
}
function bufferToString(buffer) {
return new TextDecoder("utf-8", { fatal: true }).decode(buffer);
}
function stringToBuffer(string) {
return new TextEncoder().encode(string);
}
function stringToB64Url(string) {
return bufferTob64Url(stringToBuffer(string));
}
function b64UrlToBuffer(b64UrlString) {
return new Uint8Array(B64js.toByteArray(b64UrlDecode(b64UrlString)));
}
function bufferTob64(buffer) {
return B64js.fromByteArray(new Uint8Array(buffer));
}
function bufferTob64Url(buffer) {
return b64UrlEncode(bufferTob64(buffer));
}
function b64UrlEncode(b64UrlString) {
try {
return b64UrlString
.replace(/\+/g, "-")
.replace(/\//g, "_")
.replace(/\=/g, "");
}
catch (error) {
throw new Error("Failed to encode string", { cause: error });
}
}
function b64UrlDecode(b64UrlString) {
try {
b64UrlString = b64UrlString.replace(/\-/g, "+").replace(/\_/g, "/");
let padding;
b64UrlString.length % 4 == 0
? (padding = 0)
: (padding = 4 - (b64UrlString.length % 4));
return b64UrlString.concat("=".repeat(padding));
}
catch (error) {
throw new Error("Failed to decode string", { cause: error });
}
}