encode method

@override Bip39Mnemonic encode(List<int> entropyBytes)

Overrides the encode method to convert entropy bytes into a BIP-39 mnemonic phrase.

Implementation

@override
Bip39Mnemonic encode(List<int> entropyBytes) {
  /// Validates the length of the entropy bytes.
  final entropyByteLen = entropyBytes.length;
  if (!TonMnemonicEntropyGenerator.isValidEntropyByteLen(entropyByteLen)) {
    throw ArgumentException.invalidOperationArguments(
      "encode",
      name: "entropyBytes",
      reason: "Invalid entropy bytes length.",
    );
  }

  /// Converts entropy bytes to a binary string with zero padding.
  final entropyBinStr = BytesUtils.toBinary(
    entropyBytes,
    zeroPadBitLen: entropyByteLen * 8,
  );

  /// Converts the binary string to a list of mnemonic words.
  final List<String> mnemonic = [];
  for (
    int i = 0;
    i < entropyBinStr.length;
    i += Bip39MnemonicConst.wordBitLen
  ) {
    if (i + Bip39MnemonicConst.wordBitLen > entropyBinStr.length) break;
    final wordBinStr = entropyBinStr.substring(
      i,
      i + Bip39MnemonicConst.wordBitLen,
    );
    final wordIdx = int.parse(wordBinStr, radix: 2);
    mnemonic.add(wordsList.getWordAtIdx(wordIdx));
  }

  /// Returns a BIP-39 mnemonic phrase constructed from the list of words.
  return Bip39Mnemonic.fromList(mnemonic);
}