executeExtendBlobTransaction method

Future<String> executeExtendBlobTransaction({ required String blobObjectId, required int epochs, required SuiAccount signer, String? walCoinObjectId, })

Execute a transaction that extends a blob's validity period.

Automatically resolves WAL coins from the signer's account. Returns the transaction digest.

Mirrors the TS SDK's executeExtendBlobTransaction().

Implementation

Future<String> executeExtendBlobTransaction({
  required String blobObjectId,
  required int epochs,
  required SuiAccount signer,
  String? walCoinObjectId,
}) async {
  final txBuilder = await _ensureTxBuilder();

  // Resolve WAL coin if not provided.
  String? walCoin = walCoinObjectId;
  BigInt? cost;

  if (walCoin == null) {
    // [Inference] Extension cost estimation requires knowing the blob's
    // encoded size. For now, let the Move call handle payment via gas
    // fallback. Full implementation would read the blob object to get
    // its encoded size, compute cost, and resolve a WAL coin.
  }

  final tx = txBuilder.extendBlobTransaction(
    blobObjectId: blobObjectId,
    epochs: epochs,
    walCoinObjectId: walCoin,
    extensionCost: cost,
    walType: walCoin != null ? await getWalType() : null,
  );
  tx.setSender(signer.getAddress());

  final result = await suiClient.signAndExecuteTransactionBlock(
    signer,
    tx,
    responseOptions: SuiTransactionBlockResponseOptions(
      showEffects: true,
      showObjectChanges: true,
    ),
  );

  return result.digest;
}