Add Testnet support

README.md

@@ -284,6 +284,12 @@ To override history_max in websocket config, use the path with "_" as a path del
 BHS_HISTORY_MAX=300
 ```
 
+To connect BHS to Testnet, you can use the following environment variable:
+
+```bash
+BHS_P2P_CHAIN_NET_TYPE=testnet
+````
+
 
 <!-- PROJECT LOGO -->
 <br />

config/load.go

@@ -35,6 +35,14 @@ func Load(cfg *AppConfig) (*AppConfig, *zerolog.Logger, error) {
 	}
 
 	setP2PLogger(logger)
+
+	// Update ActiveNetParams based on the loaded configuration
+	if cfg.P2P != nil {
+		ActiveNetParams = cfg.P2P.GetNetParams()
+		// Update checkpoints to use the new network params
+		Checkpoints = ActiveNetParams.Checkpoints
+	}
+
 	return cfg, logger, nil
 }
 

config/p2p_network_params.go

@@ -35,6 +35,7 @@ func (c *P2PConfig) GetNetParams() *chaincfg.Params {
 }
 
 // ActiveNetParams is a pointer to the parameters specific to the
-// currently active bitcoin network.
+// currently active bitcoin network. This is initialized to MainNet
+// but will be updated based on the P2P config when the configuration is loaded.
 // TODO: remove this after switching to new p2p server.
 var ActiveNetParams = &chaincfg.MainNetParams

internal/chaincfg/params.go

@@ -224,7 +224,9 @@ var MainNetParams = Params{
 	Net:         wire.MainNet,
 	DefaultPort: "8333",
 	DNSSeeds: []DNSSeed{
-		{"seed-nodes.bsvb.tech", true},
+		{"seed.bitcoinsv.io", true},
+		{"seed.satoshisvision.network", true},
+		{"seed.bitcoinseed.directory", true},
 	},
 
 	// Chain parameters
@@ -367,8 +369,9 @@ var TestNet3Params = Params{
 	Net:         wire.TestNet3,
 	DefaultPort: "18333",
 	DNSSeeds: []DNSSeed{
-		{"testnet-seed.metasv.io", true},
-		{"testnet-btccash-seeder.bitcoinunlimited.info", true},
+		{"testnet-seed.bitcoinsv.io", true},
+		{"testnet-seed.bitcoincloud.net", true},
+		{"testnet-seed.bitcoinseed.directory", true},
 	},
 
 	// Chain parameters

internal/chaincfg/params_test.go

@@ -37,7 +37,9 @@ func TestMustRegisterPanic(t *testing.T) {
 // TestSeeds ensures the right seeds are defined.
 func TestSeeds(t *testing.T) {
 	expectedSeeds := []DNSSeed{
-		{"seed-nodes.bsvb.tech", true},
+		{"seed.bitcoinsv.io", true},
+		{"seed.satoshisvision.network", true},
+		{"seed.bitcoinseed.directory", true},
 	}
 
 	if MainNetParams.DNSSeeds == nil {