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0.2.4 • Public • Published

SCRU160: Sortable, Clock and Random number-based Unique identifier

SCRU160 ID is yet another attempt to supersede UUID in the use cases that need decentralized, globally unique time-ordered identifiers. SCRU160 is inspired by ULID and KSUID and has the following features:

  • 160-bit feature-rich worry-free design suitable for general purposes
  • Sortable by generation time (in binary and in text)
  • Case-insensitive, highly portable encodings: 32-char base32hex and 40-char hex
  • More than 32,000 unique, time-ordered but unpredictable IDs per millisecond
  • Nearly 111-bit randomness for collision resistance
import { scru160, scru160f } from "scru160";

console.log(scru160()); // e.g. "05TTUP1HNCPNH30VEK64KDQT9BSNU4C4"
console.log(scru160()); // e.g. "05TTUP1HNCPNIB63R8IN5V2L3VFGNFET"

console.log(scru160f()); // e.g. "017bdf6431bb33750751eb63beb3c3f8c5969d86"
console.log(scru160f()); // e.g. "017bdf6431bb337662412e6a5758890735c33c2b"

See the specification for further details.


Copyright 2021 LiosK

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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