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import type { AnyU8a, CodecClass, Registry, U8aBitLength } from '../types/index.ts';
import { isU8a, u8aToU8a } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts';
import { Raw } from '../native/Raw.ts';
/** @internal */function decodeU8aFixed (value: AnyU8a, bitLength: U8aBitLength): [AnyU8a, number] {  const u8a = u8aToU8a(value);  const byteLength = bitLength / 8;
  if (!u8a.length) {    return [new Uint8Array(byteLength), 0];  }
  if (isU8a(value) ? u8a.length < byteLength : u8a.length !== byteLength) {    throw new Error(`Expected input with ${byteLength} bytes (${bitLength} bits), found ${u8a.length} bytes`);  }
  return [u8a.subarray(0, byteLength), byteLength];}
/** * @name U8aFixed * @description * A U8a that manages a a sequence of bytes up to the specified bitLength. Not meant * to be used directly, rather is should be subclassed with the specific lengths. */export class U8aFixed extends Raw {  constructor (registry: Registry, value: AnyU8a = new Uint8Array(), bitLength: U8aBitLength = 256) {    const [u8a, decodedLength] = decodeU8aFixed(value, bitLength);
    super(registry, u8a, decodedLength);  }
  public static with (bitLength: U8aBitLength, typeName?: string): CodecClass<U8aFixed> {    return class extends U8aFixed {      constructor (registry: Registry, value?: AnyU8a) {        super(registry, value, bitLength);      }
      public override toRawType (): string {        return typeName || super.toRawType();      }    };  }
  /**   * @description Returns the base runtime type name for this instance   */  public override toRawType (): string {    return `[u8;${this.length}]`;  }}