Merge #18495: rpc: Remove deprecated migration code

2599d13c94 rpc: Remove deprecated migration code (Vasil Dimov)

Pull request description:

  Don't accept a second argument to `sendrawtransaction` and
  `testmempoolaccept` of type `bool`. Actually even the code before this
  change would not accept `bool`, but it would print a long explanatory
  message when rejecting it: "Second argument must be numeric (maxfeerate)
  and no longer supports a boolean. To allow a transaction with high fees,
  set maxfeerate to 0."

  This was scheduled for removal in 6c0a6f73e.

ACKs for top commit:
  MarcoFalke:
    ACK 2599d13c94 📅

Tree-SHA512: e2c74c0bde88e20149d0deab0845851bb3979143530a6bae4f46769d61b607ad2e2347f8969093c2461a80c47661732dc0b3def140f8ce84081719adda3b3811

src/rpc/client.cpp

@@ -98,10 +98,8 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "signrawtransactionwithkey", 1, "privkeys" },
     { "signrawtransactionwithkey", 2, "prevtxs" },
     { "signrawtransactionwithwallet", 1, "prevtxs" },
-    { "sendrawtransaction", 1, "allowhighfees" },
     { "sendrawtransaction", 1, "maxfeerate" },
     { "testmempoolaccept", 0, "rawtxs" },
-    { "testmempoolaccept", 1, "allowhighfees" },
     { "testmempoolaccept", 1, "maxfeerate" },
     { "combinerawtransaction", 0, "txs" },
     { "fundrawtransaction", 1, "options" },

src/rpc/rawtransaction.cpp

@@ -825,7 +825,7 @@ static UniValue sendrawtransaction(const JSONRPCRequest& request)
 
     RPCTypeCheck(request.params, {
         UniValue::VSTR,
-        UniValueType(), // NUM or BOOL, checked later
+        UniValueType(), // VNUM or VSTR, checked inside AmountFromValue()
     });
 
     // parse hex string from parameter
@@ -834,13 +834,9 @@ static UniValue sendrawtransaction(const JSONRPCRequest& request)
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     CTransactionRef tx(MakeTransactionRef(std::move(mtx)));
 
-    CFeeRate max_raw_tx_fee_rate = DEFAULT_MAX_RAW_TX_FEE_RATE;
-    // TODO: temporary migration code for old clients. Remove in v0.20
-    if (request.params[1].isBool()) {
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "Second argument must be numeric (maxfeerate) and no longer supports a boolean. To allow a transaction with high fees, set maxfeerate to 0.");
-    } else if (!request.params[1].isNull()) {
-        max_raw_tx_fee_rate = CFeeRate(AmountFromValue(request.params[1]));
-    }
+    const CFeeRate max_raw_tx_fee_rate = request.params[1].isNull() ?
+                                             DEFAULT_MAX_RAW_TX_FEE_RATE :
+                                             CFeeRate(AmountFromValue(request.params[1]));
 
     int64_t virtual_size = GetVirtualTransactionSize(*tx);
     CAmount max_raw_tx_fee = max_raw_tx_fee_rate.GetFee(virtual_size);
@@ -896,7 +892,7 @@ static UniValue testmempoolaccept(const JSONRPCRequest& request)
 
     RPCTypeCheck(request.params, {
         UniValue::VARR,
-        UniValueType(), // NUM or BOOL, checked later
+        UniValueType(), // VNUM or VSTR, checked inside AmountFromValue()
     });
 
     if (request.params[0].get_array().size() != 1) {
@@ -910,13 +906,9 @@ static UniValue testmempoolaccept(const JSONRPCRequest& request)
     CTransactionRef tx(MakeTransactionRef(std::move(mtx)));
     const uint256& tx_hash = tx->GetHash();
 
-    CFeeRate max_raw_tx_fee_rate = DEFAULT_MAX_RAW_TX_FEE_RATE;
-    // TODO: temporary migration code for old clients. Remove in v0.20
-    if (request.params[1].isBool()) {
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "Second argument must be numeric (maxfeerate) and no longer supports a boolean. To allow a transaction with high fees, set maxfeerate to 0.");
-    } else if (!request.params[1].isNull()) {
-        max_raw_tx_fee_rate = CFeeRate(AmountFromValue(request.params[1]));
-    }
+    const CFeeRate max_raw_tx_fee_rate = request.params[1].isNull() ?
+                                             DEFAULT_MAX_RAW_TX_FEE_RATE :
+                                             CFeeRate(AmountFromValue(request.params[1]));
 
     CTxMemPool& mempool = EnsureMemPool();
     int64_t virtual_size = GetVirtualTransactionSize(*tx);
@@ -1823,10 +1815,10 @@ static const CRPCCommand commands[] =
     { "rawtransactions",    "createrawtransaction",         &createrawtransaction,      {"inputs","outputs","locktime","replaceable"} },
     { "rawtransactions",    "decoderawtransaction",         &decoderawtransaction,      {"hexstring","iswitness"} },
     { "rawtransactions",    "decodescript",                 &decodescript,              {"hexstring"} },
-    { "rawtransactions",    "sendrawtransaction",           &sendrawtransaction,        {"hexstring","allowhighfees|maxfeerate"} },
+    { "rawtransactions",    "sendrawtransaction",           &sendrawtransaction,        {"hexstring","maxfeerate"} },
     { "rawtransactions",    "combinerawtransaction",        &combinerawtransaction,     {"txs"} },
     { "rawtransactions",    "signrawtransactionwithkey",    &signrawtransactionwithkey, {"hexstring","privkeys","prevtxs","sighashtype"} },
-    { "rawtransactions",    "testmempoolaccept",            &testmempoolaccept,         {"rawtxs","allowhighfees|maxfeerate"} },
+    { "rawtransactions",    "testmempoolaccept",            &testmempoolaccept,         {"rawtxs","maxfeerate"} },
     { "rawtransactions",    "decodepsbt",                   &decodepsbt,                {"psbt"} },
     { "rawtransactions",    "combinepsbt",                  &combinepsbt,               {"txs"} },
     { "rawtransactions",    "finalizepsbt",                 &finalizepsbt,              {"psbt", "extract"} },