Writing to Blockchain

• Records submitted to the blockchain are not added to the blockchain immediately. Records are contained within transactions which are collected into blocks. These need to be agreed between several blockchain operators ("miners") before the blocks are added to the blockchain.

• GET location status provides the latest confirmation status of a record being submitted to the blockchain. Depending on the use case, it is good practice to check the location status for the submit operations (Write, Create, Update and Delete) once every 10 minutes (at the most frequent) until the confirmation status is satisfactory.

• If GET location status reports that the operation has failed, retry the operation.

• There is no guarantee that a record will be mined and confirmed within any number of blocks.

• There is also a minute possibility that a record will not be mined at all. If it is not mined within a reasonable time frame, for example 1 hour, retry the submit operation.

• The update and delete requests are valid only after the preceding record has been mined, otherwise resulting in undefined behaviour.