ethers.js/lib.commonjs/utils/uuid.js
2022-12-30 11:30:03 -05:00

34 lines
1.0 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.uuidV4 = void 0;
/**
* Explain UUID and link to RFC here.
*
* @_subsection: api/utils:UUID [about-uuid]
*/
const data_js_1 = require("./data.js");
/**
* Returns the version 4 [[link-uuid]] for the %%randomBytes%%.
*
* @see: https://www.ietf.org/rfc/rfc4122.txt (Section 4.4)
*/
function uuidV4(randomBytes) {
const bytes = (0, data_js_1.getBytes)(randomBytes, "randomBytes");
// Section: 4.1.3:
// - time_hi_and_version[12:16] = 0b0100
bytes[6] = (bytes[6] & 0x0f) | 0x40;
// Section 4.4
// - clock_seq_hi_and_reserved[6] = 0b0
// - clock_seq_hi_and_reserved[7] = 0b1
bytes[8] = (bytes[8] & 0x3f) | 0x80;
const value = (0, data_js_1.hexlify)(bytes);
return [
value.substring(2, 10),
value.substring(10, 14),
value.substring(14, 18),
value.substring(18, 22),
value.substring(22, 34),
].join("-");
}
exports.uuidV4 = uuidV4;
//# sourceMappingURL=uuid.js.map