Merge #15770: rpc: Validate maxfeerate with AmountFromValue

aa410c2b17 rpc: Validate maxfeerate with AmountFromValue (João Barbosa)

Pull request description:

  With this change `maxfeerate` can also be set as a string, accordingly to the help test:
  ```
    maxfeerate    (numeric or string,
  ```
  Beside, there are no tests for the removed errors.

ACKs for commit aa410c:
  meshcollider:
    utACK https://github.com/bitcoin/bitcoin/pull/15770/commits/aa410c2b17c0320123fde3d3bf205a64d86b8696
  MarcoFalke:
    utACK aa410c2b17 Good catch

Tree-SHA512: f3bfea91dc7daa943729e270585dbf333055aeda805fbd01eaab20a7e0e6147382647c11525334382d198df0d3d45da6102b541efda5a1361f96271c98d5d89d

1 files changed, 2 insertions, 6 deletions

diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index 91331198e2..1a7216ceeb 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -818,15 +818,13 @@ static UniValue sendrawtransaction(const JSONRPCRequest& request)
     // 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].isNum()) {
+    } else if (!request.params[1].isNull()) {
         size_t weight = GetTransactionWeight(*tx);
         CFeeRate fr(AmountFromValue(request.params[1]));
         // the +3/4 part rounds the value up, and is the same formula used when
         // calculating the fee for a transaction
         // (see GetVirtualTransactionSize)
         max_raw_tx_fee = fr.GetFee((weight+3)/4);
-    } else if (!request.params[1].isNull()) {
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "second argument (maxfeerate) must be numeric");
     }
 
     uint256 txid;
@@ -900,15 +898,13 @@ static UniValue testmempoolaccept(const JSONRPCRequest& request)
     // 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].isNum()) {
+    } else if (!request.params[1].isNull()) {
         size_t weight = GetTransactionWeight(*tx);
         CFeeRate fr(AmountFromValue(request.params[1]));
         // the +3/4 part rounds the value up, and is the same formula used when
         // calculating the fee for a transaction
         // (see GetVirtualTransactionSize)
         max_raw_tx_fee = fr.GetFee((weight+3)/4);
-    } else if (!request.params[1].isNull()) {
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "second argument (maxfeerate) must be numeric");
     }
 
     UniValue result(UniValue::VARR);