[validation] Add CChainState::ProcessTransaction()

This just calls through to AcceptToMemoryPool() internally, and is currently unused.

Also add a new transaction validation failure reason TX_NO_MEMPOOL to
indicate that there is no mempool.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/validation.cpp b/src/validation.cpp
index f1c44d61ae..1947f5d9c3 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -3421,6 +3421,17 @@ bool ChainstateManager::ProcessNewBlock(const CChainParams& chainparams, const s
     return true;
 }
 
+MempoolAcceptResult ChainstateManager::ProcessTransaction(const CTransactionRef& tx, bool test_accept)
+{
+    CChainState& active_chainstate = ActiveChainstate();
+    if (!active_chainstate.m_mempool) {
+        TxValidationState state;
+        state.Invalid(TxValidationResult::TX_NO_MEMPOOL, "no-mempool");
+        return MempoolAcceptResult::Failure(state);
+    }
+    return AcceptToMemoryPool(active_chainstate, *active_chainstate.m_mempool, tx, /*bypass_limits=*/ false, test_accept);
+}
+
 bool TestBlockValidity(BlockValidationState& state,
                        const CChainParams& chainparams,
                        CChainState& chainstate,