The ledger enclave maintains the ledger in an enclave in the form of integrity-specific metadata representing the most recent blockchain state. It performs the same validation steps as the peer when a new block arrives, but additionally generates a cryptographic hash of each key-value pair of the blockchain state and stores it within the enclave. The ledger enclave exposes an interface to the chaincode enclave for accessing the integrity-specific metadata. This is used to verify the correctness of the data retrieved from the blockchain state.
We use nanopb for proto buffers inside the trusted ledger enclave.
We can generate the proto files by using make protos. Please check that
you export the environment variables NANOPB_PATH. Fabric proto files
are located in protos/fabric and fetched from https://github.com/hyperledger/fabric-protos.
We use cmake to build tlcc_enclave. For convince, you can just invoke make
to trigger the cmake build.
$ make
$ make test
Run gdb
$ make
$ LD_LIBRARY_PATH=$LD_LIBRARY_PATH:./ sgx-gdb test_runner
> enable sgx_emmt
> r
Note that OPENSSL sometimes complains, here you can just continue debugging.
$ make clean