From 8c3fdc5b6123374e1267bd5cd92190ddf2623feb Mon Sep 17 00:00:00 2001
From: Brannon King <countprimes@gmail.com>
Date: Tue, 9 Nov 2021 15:50:02 -0500
Subject: [PATCH] made estimatesmartfee call estimatefee (for now)

---
 rpcserver.go     | 24 +++++++++++++++++++++---
 rpcserverhelp.go | 12 +++++++++++-
 2 files changed, 32 insertions(+), 4 deletions(-)

diff --git a/rpcserver.go b/rpcserver.go
index 9848ac6d..588e4179 100644
--- a/rpcserver.go
+++ b/rpcserver.go
@@ -137,6 +137,7 @@ var rpcHandlersBeforeInit = map[string]commandHandler{
 	"decoderawtransaction":   handleDecodeRawTransaction,
 	"decodescript":           handleDecodeScript,
 	"estimatefee":            handleEstimateFee,
+	"estimatesmartfee":       handleEstimateSmartFee,
 	"generate":               handleGenerate,
 	"generatetoaddress":      handleGenerateToAddress,
 	"getaddednodeinfo":       handleGetAddedNodeInfo,
@@ -879,23 +880,40 @@ func handleEstimateFee(s *rpcServer, cmd interface{}, closeChan <-chan struct{})
 	c := cmd.(*btcjson.EstimateFeeCmd)
 
 	if s.cfg.FeeEstimator == nil {
-		return nil, errors.New("Fee estimation disabled")
+		return nil, &btcjson.RPCError{
+			Code:    btcjson.ErrRPCInternal.Code,
+			Message: "Fee estimation disabled",
+		}
 	}
 
 	if c.NumBlocks <= 0 {
-		return -1.0, errors.New("Parameter NumBlocks must be positive")
+		return nil, &btcjson.RPCError{
+			Code:    btcjson.ErrRPCInvalidParameter,
+			Message: "Parameter NumBlocks must be positive",
+		}
 	}
 
 	feeRate, err := s.cfg.FeeEstimator.EstimateFee(uint32(c.NumBlocks))
 
 	if err != nil {
-		return -1.0, err
+		return nil, &btcjson.RPCError{
+			Code:    btcjson.ErrRPCInvalidParameter,
+			Message: err.Error(),
+		}
 	}
 
 	// Convert to satoshis per kb.
 	return float64(feeRate), nil
 }
 
+func handleEstimateSmartFee(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
+	c := cmd.(*btcjson.EstimateSmartFeeCmd)
+
+	rpcsLog.Debugf("EstimateSmartFee is not implemented; falling back to EstimateFee. Requested mode: %s", c.EstimateMode)
+
+	return handleEstimateFee(s, &btcjson.EstimateFeeCmd{NumBlocks: c.ConfTarget}, closeChan)
+}
+
 func handleGenerate(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (interface{}, error) {
 	// Respond with an error if there are no addresses to pay the
 	// created blocks to.
diff --git a/rpcserverhelp.go b/rpcserverhelp.go
index 2d191649..881cfeb5 100644
--- a/rpcserverhelp.go
+++ b/rpcserverhelp.go
@@ -123,9 +123,18 @@ var helpDescsEnUS = map[string]string{
 		"blocks have been generated.",
 	"estimatefee-numblocks": "The maximum number of blocks which can be " +
 		"generated before the transaction is mined.",
-	"estimatefee--result0": "Estimated fee per kilobyte in satoshis for a block to " +
+	"estimatefee--result0": "Estimated fee per kilobyte in satoshis necessary for a block to " +
 		"be mined in the next NumBlocks blocks.",
 
+	"estimatesmartfee--synopsis": "Estimate the fee per kilobyte in satoshis " +
+		"required for a transaction to be mined before a certain number of " +
+		"blocks have been generated. Same as estimatefee presently.",
+	"estimatesmartfee-conftarget": "The maximum number of blocks which can be " +
+		"generated before the transaction is mined.",
+	"estimatesmartfee-estimatemode": "Unused at present.",
+	"estimatesmartfee--result0": "Estimated fee per kilobyte in satoshis necessary for a block to " +
+		"be mined in the next ConfTarget blocks.",
+
 	// GenerateCmd help
 	"generate--synopsis": "Generates a set number of blocks (simnet or regtest only) and returns a JSON\n" +
 		" array of their hashes.",
@@ -841,6 +850,7 @@ var rpcResultTypes = map[string][]interface{}{
 	"decoderawtransaction":   {(*btcjson.TxRawDecodeResult)(nil)},
 	"decodescript":           {(*btcjson.DecodeScriptResult)(nil)},
 	"estimatefee":            {(*float64)(nil)},
+	"estimatesmartfee":       {(*float64)(nil)},
 	"generate":               {(*[]string)(nil)},
 	"generatetoaddress":      {(*[]string)(nil)},
 	"getaddednodeinfo":       {(*[]string)(nil), (*[]btcjson.GetAddedNodeInfoResult)(nil)},