The FFI functions used to write this proxy server are

pactffi_create_mock_server

and

pactffi_mock_server_mismatches

.

Those FFI functions internally use the

pact_mock_server

crate. There are no examples using it, but there are some tests that do. See https://github.com/pact-foundation/pact-reference/blob/master/rust/pact_mock_server/src/tests.rs#L258

Thanks! I will give it a try.