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Why This is the first PR in the broader `mptoken_issuance_history` plan. It lands the additive schema/backend layer first so later PRs can safely add live ETL indexing, historical backfill, and finally the RPC handler gated on backfill completion. Keeping this step dark avoids exposing partial history while still making the stack reviewable in small pieces. Summary Adds the storage and backend primitives for MPT transaction-history filtering. - Adds Cassandra tables: - mpt_transactions - account_mpt_transactions - Adds MPTTransactionsData and backend interface methods for writing/fetching both MPT index shapes. Implements Cassandra write/fetch paths with forward/reverse pagination, raw-page cursor behavior, and case-insensitive tx_type filtering before transaction hydration. - Adds MockBackend coverage for the new pure-virtual methods. - Adds Cassandra integration tests for round-trip behavior, ordering, pagination, missing transaction blobs, sparse tx_type filtering, account fanout, and account-side filtering.
Integration testing
Tests that hit the real database are separate from the unit test suite found under tests/unit.
Requirements
Cassandra/ScyllaDB cluster
If you wish to test the backend component you will need to have access to a local (127.0.0.1) Cassandra cluster, opened at port 9042. Please ensure that the cluster is successfully running before running these tests.
Running
To run the DB tests, first build Clio as normal, then execute ./clio_integration_tests to run all database tests.