getBlobType method
Get the Sui Move type for Walrus Blob objects.
Returns <typeOriginPackageId>::blob::Blob where the package ID
is the type origin — the original package where Blob was
first defined. This is needed for StructType filters because
Sui stamps object types with the original defining package ID.
Mirrors TS SDK's getBlobType() + #getPackageId().
Implementation
Future<String> getBlobType() async {
final packageId = await _stateReader.getPackageId();
return '$packageId::blob::Blob';
}