write static method

XdrSCVal write(OZSmartAccountAuthPayload payload)

Writes an OZSmartAccountAuthPayload to its XdrSCVal representation.

Builds the outer map with exactly two entries in alphabetical insertion order (context_rule_ids, then signers), matching the Soroban Rust #[contracttype] derive ordering for the contract's AuthPayload struct. Inner signer entries are sorted by the lowercase-hex of their XDR-encoded keys so the encoding is deterministic and the host-side dynamic-Map ordering check is satisfied.

Throws SmartAccountTransactionSigningFailed when XDR encoding of a signer key fails.

Implementation

static XdrSCVal write(OZSmartAccountAuthPayload payload) {
  // Build signer map entries, wrapping each raw signature byte array in
  // an XdrSCVal.forBytes value.
  final signerEntries = <XdrSCMapEntry>[];
  for (final entry in payload.signers.entries) {
    signerEntries.add(
      XdrSCMapEntry(
        entry.key.toScVal(),
        XdrSCVal.forBytes(entry.value),
      ),
    );
  }

  // Sort signer entries by lowercase-hex of their XDR-encoded key bytes.
  // Lowercase-hex(byte sequence) is monotone in the underlying byte
  // sequence, so the resulting order is identical to a raw byte
  // lexicographic sort.
  signerEntries.sort((a, b) {
    try {
      final keyA = _xdrHexOfScVal(a.key);
      final keyB = _xdrHexOfScVal(b.key);
      return keyA.compareTo(keyB);
    } catch (e) {
      throw SmartAccountTransactionException.signingFailed(
        'Failed to XDR-encode signer key for sorting: $e',
        cause: e,
      );
    }
  });

  final signersMapScVal = XdrSCVal.forMap(signerEntries);

  final ruleIdsVec = payload.contextRuleIds
      .map((id) => XdrSCVal.forU32(id))
      .toList(growable: false);
  final contextRuleIdsScVal = XdrSCVal.forVec(ruleIdsVec);

  // Outer struct map keys insert in alphabetical order to match the
  // Soroban Rust `#[contracttype]` derive convention. Inner dynamic-map
  // keys are sorted above by XDR-byte order.
  return XdrSCVal.forMap([
    XdrSCMapEntry(
      XdrSCVal.forSymbol('context_rule_ids'),
      contextRuleIdsScVal,
    ),
    XdrSCMapEntry(
      XdrSCVal.forSymbol('signers'),
      signersMapScVal,
    ),
  ]);
}