decoding.ts

import { Address } from '@unique-nft/utils/address';

import { RoyaltyType, UniqueRoyaltyPart } from './types';
import { splitStringEvery } from './shared';

export const decodeRoyaltyPart = (encoded: string): UniqueRoyaltyPart => {
  const encodedMeta = encoded.slice(2, 66);
  const encodedAddress = encoded.slice(2 + 64);

  const version = parseInt(encodedMeta.slice(0, 2), 16);
  const decimals = parseInt(encodedMeta.slice(46, 46 + 2), 16);
  const value = BigInt('0x' + encodedMeta.slice(48));
  const royaltyType =
    encodedMeta[44] === '0' ? RoyaltyType.DEFAULT : RoyaltyType.PRIMARY_ONLY;

  const isEthereum = encodedMeta[45] === '0';
  const address = isEthereum
    ? '0x' + encodedAddress.slice(24)
    : Address.substrate.encode(encodedAddress);

  return {
    version,
    decimals,
    value,
    royaltyType,
    address,
  };
};

export const decodeRoyalty = (encoded: string): UniqueRoyaltyPart[] => {
  const parts = splitStringEvery(encoded.substring(2), 128).map(
    (encoded) => '0x' + encoded,
  );

  return parts.map((part) => decodeRoyaltyPart(part));
};