Remove duplicate checks in SubmitMemoryPoolAndRelay

IsCoinBase check is already performed early by
AcceptToMemoryPoolWorker
GetDepthInMainChain check is already perfomed by
BroadcastTransaction

To avoid deadlock we MUST keep lock order in
ResendWalletTransactions and CommitTransaction,
even if we lock cs_main again further.
in BroadcastTransaction. Lock order will need
to be clean at once in a future refactoring

Author: Antoine Riard

src/wallet/wallet.cpp

@@ -2150,20 +2150,16 @@ void CWallet::ReacceptWalletTransactions(interfaces::Chain::Lock& locked_chain)
     for (const std::pair<const int64_t, CWalletTx*>& item : mapSorted) {
         CWalletTx& wtx = *(item.second);
         std::string unused_err_string;
-        wtx.SubmitMemoryPoolAndRelay(unused_err_string, false, locked_chain);
+        wtx.SubmitMemoryPoolAndRelay(unused_err_string, false);
     }
 }
 
-bool CWalletTx::SubmitMemoryPoolAndRelay(std::string& err_string, bool relay, interfaces::Chain::Lock& locked_chain)
+bool CWalletTx::SubmitMemoryPoolAndRelay(std::string& err_string, bool relay)
 {
     // Can't relay if wallet is not broadcasting
     if (!pwallet->GetBroadcastTransactions()) return false;
-    // Don't relay coinbase transactions outside blocks
-    if (IsCoinBase()) return false;
     // Don't relay abandoned transactions
     if (isAbandoned()) return false;
-    // Don't relay conflicted or already confirmed transactions
-    if (GetDepthInMainChain(locked_chain) != 0) return false;
 
     // Submit transaction to mempool for relay
     pwallet->WalletLogPrintf("Submitting wtx %s to mempool for relay\n", GetHash().ToString());
@@ -2382,7 +2378,7 @@ void CWallet::ResendWalletTransactions()
             // last block was found
             if (wtx.nTimeReceived > m_best_block_time - 5 * 60) continue;
             std::string unused_err_string;
-            if (wtx.SubmitMemoryPoolAndRelay(unused_err_string, true, *locked_chain)) ++submitted_tx_count;
+            if (wtx.SubmitMemoryPoolAndRelay(unused_err_string, true)) ++submitted_tx_count;
         }
     } // locked_chain and cs_wallet
 
@@ -3327,7 +3323,7 @@ bool CWallet::CommitTransaction(CTransactionRef tx, mapValue_t mapValue, std::ve
         if (fBroadcastTransactions)
         {
             std::string err_string;
-            if (!wtx.SubmitMemoryPoolAndRelay(err_string, true, *locked_chain)) {
+            if (!wtx.SubmitMemoryPoolAndRelay(err_string, true)) {
                 WalletLogPrintf("CommitTransaction(): Transaction cannot be broadcast immediately, %s\n", err_string);
                 // TODO: if we expect the failure to be long term or permanent, instead delete wtx from the wallet and return failure.
             }

src/wallet/wallet.h

@@ -580,7 +580,7 @@ class CWalletTx
     int64_t GetTxTime() const;
 
     // Pass this transaction to node for mempool insertion and relay to peers if flag set to true
-    bool SubmitMemoryPoolAndRelay(std::string& err_string, bool relay, interfaces::Chain::Lock& locked_chain);
+    bool SubmitMemoryPoolAndRelay(std::string& err_string, bool relay);
 
     // TODO: Remove "NO_THREAD_SAFETY_ANALYSIS" and replace it with the correct
     // annotation "EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)". The annotation