123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172
import { encode as hexEncode } from "../crypto/hex.ts"import * as $ from "../deps/scale.ts"import { Blake2b } from "../deps/wat_the_crypto.ts"import { getOrInit, WeakRefMap } from "../util/mod.ts"
export class Id {  private constructor(public hex: string, public u8a: Uint8Array) {}
  private static u8aMap = new WeakRefMap<string, Id>()  private static fromU8a(u8a: Uint8Array) {    const hex = hexEncode(u8a)    return getOrInit(this.u8aMap, hex, () => new Id(hex, u8a))  }
  static random() {    return this.fromU8a(crypto.getRandomValues(new Uint8Array(64)))  }
  private static locMap = new Map<TemplateStringsArray, Id>()  static loc(tag: TemplateStringsArray) {    return getOrInit(this.locMap, tag, () => this.random())  }
  private static _hash(u8a: Uint8Array) {    const hasher = new Blake2b()    hasher.update(u8a)    return this.fromU8a(hasher.digest())  }
  private static valueMap = new WeakRefMap<unknown, Id>()  static value(value: unknown): Id {    if (value instanceof Id) {      return value    } else if (      typeof value === "object"      && value      && "id" in value      && value["id" as never] as any instanceof Id    ) {      return value["id" as never]    }    return getOrInit(this.valueMap, value, () => {      if (typeof value === "number") {        return this._hash(new Uint8Array(new Float64Array([value])))      }      if (typeof value === "string") {        return this._hash(new TextEncoder().encode(value))      }      if (typeof value === "bigint") {        return this._hash($.i256.encode(value))      }      if (typeof value === "boolean") {        return this._hash(new Uint8Array([+value]))      }      return this.random()    })  }
  static hash(base: Id, ...rest: unknown[]) {    const hasher = new Blake2b()    hasher.update(base.u8a)    for (const value of rest) {      hasher.update(this.value(value).u8a)    }    return this.fromU8a(hasher.digest())  }
  toString() {    return this.hex  }}