[−][src]Crate exonum_middleware_service
Middleware service providing ways to compose transactions from the simpler building blocks.
Functionality overview
Transaction batching
Batching allows to atomically execute several transactions; if an error occurs during execution, changes made by all transactions are rolled back. All transactions in the batch are authorized in the same way as the batch itself.
Checked call
Checked call is a way to ensure that the called service corresponds to a specific artifact
with an expected version range. Unlike alternatives (e.g., finding out this information via
the services endpoint of the node HTTP API), using checked calls is most failsafe; by design,
it cannot suffer from TOCTOU issues. It does impose a certain overhead on the execution, though.
Modules
| proto | Module of the rust-protobuf generated files. |
Structs
| ArtifactReq | A wrapper around an artifact requirement. |
| Batch | Transactions executed in a batch. |
| CheckedCall | Checked call to the service. |
| MiddlewareService | Middleware service. |
Enums
| Error | Errors of the |
Traits
| MiddlewareInterface | Transactional interface of the utilities service. |
| MiddlewareInterfaceMut | Transactional interface of the utilities service. |