Added null-check on transactionIdentifier
Added null-check on transactionIdentifier

adambard/tapstream-sdk,adambard/tapstream-sdk,adambard/tapstream-sdk,adambard/tapstream-sdk,adambard/tapstream-sdk,adambard/tapstream-sdk,adambard/tapstream-sdk,adambard/tapstream-sdk,adambard/tapstream-sdk