rpcclient+btcjson: support testmempoolaccept for bitcoind v22.0 and…

… above

btcjson/chainsvrresults.go

@@ -900,10 +900,14 @@ type TestMempoolAcceptFees struct {
 	// EffectiveFeeRate specifies the effective feerate in BTC per KvB. May
 	// differ from the base feerate if, for example, there are modified
 	// fees from prioritisetransaction or a package feerate was used.
+	//
+	// NOTE: this field only exists in bitcoind v25.0 and above.
 	EffectiveFeeRate float64 `json:"effective-feerate"`
 
 	// EffectiveIncludes specifies transactions whose fees and vsizes are
 	// included in effective-feerate. Each item is a transaction wtxid in
 	// hex.
+	//
+	// NOTE: this field only exists in bitcoind v25.0 and above.
 	EffectiveIncludes []string `json:"effective-includes"`
 }

rpcclient/infrastructure.go

@@ -110,10 +110,14 @@ const (
 	// BitcoindPre19 represents a bitcoind version before 0.19.0.
 	BitcoindPre19 BackendVersion = iota
 
-	// BitcoindPost19 represents a bitcoind version equal to or greater than
-	// 0.19.0.
+	// BitcoindPost19 represents a bitcoind version equal to or greater
+	// than 0.19.0.
 	BitcoindPost19
 
+	// BitcoindPost22 represents a bitcoind version equal to or greater
+	// than 22.0.0.
+	BitcoindPost22
+
 	// BitcoindPost25 represents a bitcoind version equal to or greater
 	// than 25.0.0.
 	BitcoindPost25
@@ -129,7 +133,10 @@ func (b BackendVersion) String() string {
 		return "bitcoind 0.19 and below"
 
 	case BitcoindPost19:
-		return "bitcoind v0.19-v0.25"
+		return "bitcoind v0.19-v0.22"
+
+	case BitcoindPost22:
+		return "bitcoind v0.22-v0.25"
 
 	case BitcoindPost25:
 		return "bitcoind v0.25 and above"

rpcclient/rawtransactions.go

@@ -927,8 +927,8 @@ func (c *Client) TestMempoolAcceptAsync(txns []*wire.MsgTx,
 
 	log.Debugf("TestMempoolAcceptAsync: backend version %s", version)
 
-	// Exit early if the version is below 25.0.0.
-	if version < BitcoindPost25 {
+	// Exit early if the version is below 22.0.0.
+	if version < BitcoindPost22 {
 		err := fmt.Errorf("%w: %v", ErrBitcoindVersion, version)
 		return newFutureError(err)
 	}