@aeternity/aepp-sdk/es/tx/builder/field-types/enumeration.js

SDK for the æternity blockchain

import { Buffer as _Buffer } from "buffer";
import { ArgumentError } from '../../../utils/errors.js';
import { isItemOfArray } from '../../../utils/other.js';
export default function genEnumerationField(enm) {
  const values = Object.values(enm).filter(v => typeof v === 'number');
  return {
    serialize(value) {
      if (typeof value !== 'number') throw new ArgumentError('value', 'to be a number', value);
      if (value > 0xff) throw new ArgumentError('value', 'to be less than 256', value);
      if (!isItemOfArray(value, values)) {
        throw new ArgumentError('value', 'to be a value of Enum', value);
      }
      return _Buffer.from([value]);
    },
    deserialize(buffer) {
      if (buffer.length !== 1) {
        throw new ArgumentError('buffer', 'to have single element', buffer.length);
      }
      const value = buffer[0];
      if (!isItemOfArray(value, values)) {
        throw new ArgumentError('value', 'to be a value of Enum', value);
      }
      return value;
    }
  };
}
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