Bitcoin Core Test Framework Python framework used by Bitcoin Core's own test suite. Located in of the bitcoin/bitcoin repo. Architecture Run: Components - — base class. - — wraps bitcoind + RPC. - — minimal in-test wallet (no full descriptor wallet). - — wire format (CTxIn, CTxOut, CTransaction). - — Script construction (CScript, opcodes). - — descriptor parsing helpers. - — secp256k1 helpers. - — wallet helpers. - — PSBT utilities. Key methods - — mine n blocks. - — wait for nodes to converge. - — wait for mempool sync. - / — manage peers. - — restart with new args. - — poll until True. Use…