feat(btc): support all net’s suggest fee rate.

core/btc/chain.go

@@ -98,18 +98,19 @@ type FeeRate struct {
 }
 
 func (c *Chain) SuggestFeeRate() (rates *FeeRate, err error) {
+	defer base.CatchPanicAndMapToBasicError(&err)
+
+	url := ""
 	switch c.Chainnet {
 	case ChainBitcoin, ChainMainnet:
-		return SuggestFeeRate()
+		url = "https://mempool.space/api/v1/fees/recommended"
+	case ChainTestnet:
+		url = "https://mempool.space/testnet/api/v1/fees/recommended"
+	case ChainSignet:
+		url = "https://mempool.space/signet/api/v1/fees/recommended"
 	default:
 		return &FeeRate{1, 1, 1}, nil
 	}
-}
-
-func SuggestFeeRate() (rates *FeeRate, err error) {
-	defer base.CatchPanicAndMapToBasicError(&err)
-
-	url := "https://mempool.space/api/v1/fees/recommended"
 	response, err := httpUtil.Request(http.MethodGet, url, nil, nil)
 	if err != nil {
 		return

core/btc/chain_test.go

@@ -164,12 +164,16 @@ func TestChain_SuggestFeeRate(t *testing.T) {
 	}
 	for _, chainnet := range chains {
 		t.Run(chainnet, func(t *testing.T) {
-			t.Logf("===== %v =====", chainnet)
 			chain, err := NewChainWithChainnet(chainnet)
 			require.Nil(t, err)
 			rate, err := chain.SuggestFeeRate()
 			require.Nil(t, err)
-			t.Logf("\n high: %v\n average: %v\n low: %v\n", rate.High, rate.Average, rate.Low)
+			t.Logf(`
+	===== %v =====
+	high: %v
+	average: %v
+	low: %v
+			`, chainnet, rate.High, rate.Average, rate.Low)
 		})
 	}
 }