diff --git a/contrib/localnet/scripts/start-zetaclientd.sh b/contrib/localnet/scripts/start-zetaclientd.sh
index 93fa5c2af6..016dc8fbcf 100755
--- a/contrib/localnet/scripts/start-zetaclientd.sh
+++ b/contrib/localnet/scripts/start-zetaclientd.sh
@@ -115,4 +115,9 @@ if [[ -f /root/zetaclient-config-overlay.json ]]; then
   mv /tmp/merged_config.json /root/.zetacored/config/zetaclient_config.json
 fi
 
+# signet
+export CHAIN_18333_SCAN_FROM_BLOCK=latest
+# testnet4
+export CHAIN_18334_SCAN_FROM_BLOCK=latest
+
 zetaclientd-supervisor start < /root/password.file
\ No newline at end of file
diff --git a/contrib/localnet/scripts/zetaclient-config-overlay.json b/contrib/localnet/scripts/zetaclient-config-overlay.json
new file mode 100644
index 0000000000..a66aad5faf
--- /dev/null
+++ b/contrib/localnet/scripts/zetaclient-config-overlay.json
@@ -0,0 +1,26 @@
+{
+	"BTCChainConfigs": {
+		"18444": {
+		  "RPCUsername": "smoketest",
+		  "RPCPassword": "123",
+		  "RPCHost": "bitcoin:18443",
+		  "RPCParams": "regtest",
+		  "RPCAlertLatency": 60
+		},
+		"18333": {
+		  "RPCUsername": "default",
+		  "RPCPassword": "default",
+		  "RPCHost": "172.17.0.1:38332",
+		  "RPCParams": "testnet3",
+		  "RPCAlertLatency": 60
+		},
+		"18334": {
+		  "RPCUsername": "default",
+		  "RPCPassword": "default",
+		  "RPCHost": "172.17.0.1:48332",
+		  "RPCParams": "testnet3",
+		  "RPCAlertLatency": 60
+
+		}
+	}
+}
diff --git a/e2e/txserver/zeta_tx_server.go b/e2e/txserver/zeta_tx_server.go
index 146dda4cf2..2eb7fe3602 100644
--- a/e2e/txserver/zeta_tx_server.go
+++ b/e2e/txserver/zeta_tx_server.go
@@ -453,6 +453,26 @@ func (zts ZetaTxServer) DeployZRC20s(
 			coin.CoinType_Gas,
 			100000,
 		),
+		fungibletypes.NewMsgDeployFungibleCoinZRC20(
+			deployerAddr,
+			"",
+			chains.BitcoinSignetTestnet.ChainId,
+			8,
+			"BTC",
+			"tBTC",
+			coin.CoinType_Gas,
+			100000,
+		),
+		fungibletypes.NewMsgDeployFungibleCoinZRC20(
+			deployerAddr,
+			"",
+			chains.BitcoinTestnet4.ChainId,
+			8,
+			"BTC",
+			"tBTC",
+			coin.CoinType_Gas,
+			100000,
+		),
 		fungibletypes.NewMsgDeployFungibleCoinZRC20(
 			deployerAddr,
 			"",
diff --git a/x/observer/genesis.go b/x/observer/genesis.go
index 12a92887c2..9d101b6624 100644
--- a/x/observer/genesis.go
+++ b/x/observer/genesis.go
@@ -24,6 +24,10 @@ func InitGenesis(ctx sdk.Context, k keeper.Keeper, genState types.GenesisState)
 		// if no chain params are defined, set localnet chains for test purposes
 		btcChainParams := types.GetDefaultBtcRegtestChainParams()
 		btcChainParams.IsSupported = true
+		btcChainTestnet4Params := types.GetDefaultBtcTestnet4ChainParams()
+		btcChainTestnet4Params.IsSupported = true
+		btcChainSignetParams := types.GetDefaultBtcSignetChainParams()
+		btcChainSignetParams.IsSupported = true
 		goerliChainParams := types.GetDefaultGoerliLocalnetChainParams()
 		goerliChainParams.IsSupported = true
 		zetaPrivnetChainParams := types.GetDefaultZetaPrivnetChainParams()
@@ -31,6 +35,8 @@ func InitGenesis(ctx sdk.Context, k keeper.Keeper, genState types.GenesisState)
 		k.SetChainParamsList(ctx, types.ChainParamsList{
 			ChainParams: []*types.ChainParams{
 				btcChainParams,
+				btcChainTestnet4Params,
+				btcChainSignetParams,
 				goerliChainParams,
 				zetaPrivnetChainParams,
 			},
diff --git a/x/observer/types/chain_params.go b/x/observer/types/chain_params.go
index b76af2da49..e39bc8b59b 100644
--- a/x/observer/types/chain_params.go
+++ b/x/observer/types/chain_params.go
@@ -146,6 +146,8 @@ func GetDefaultChainParams() ChainParamsList {
 			GetDefaultBscTestnetChainParams(),
 			GetDefaultMumbaiTestnetChainParams(),
 			GetDefaultBtcTestnetChainParams(),
+			GetDefaultBtcTestnet4ChainParams(),
+			GetDefaultBtcSignetChainParams(),
 			GetDefaultBtcRegtestChainParams(),
 			GetDefaultGoerliLocalnetChainParams(),
 		},
@@ -279,6 +281,42 @@ func GetDefaultBtcTestnetChainParams() *ChainParams {
 		IsSupported:                 false,
 	}
 }
+func GetDefaultBtcTestnet4ChainParams() *ChainParams {
+	return &ChainParams{
+		ChainId:                     chains.BitcoinTestnet4.ChainId,
+		ConfirmationCount:           2,
+		ZetaTokenContractAddress:    constant.EVMZeroAddress,
+		ConnectorContractAddress:    constant.EVMZeroAddress,
+		Erc20CustodyContractAddress: constant.EVMZeroAddress,
+		WatchUtxoTicker:             30,
+		InboundTicker:               120,
+		OutboundTicker:              12,
+		GasPriceTicker:              30,
+		OutboundScheduleInterval:    30,
+		OutboundScheduleLookahead:   100,
+		BallotThreshold:             DefaultBallotThreshold,
+		MinObserverDelegation:       DefaultMinObserverDelegation,
+		IsSupported:                 false,
+	}
+}
+func GetDefaultBtcSignetChainParams() *ChainParams {
+	return &ChainParams{
+		ChainId:                     chains.BitcoinSignetTestnet.ChainId,
+		ConfirmationCount:           2,
+		ZetaTokenContractAddress:    constant.EVMZeroAddress,
+		ConnectorContractAddress:    constant.EVMZeroAddress,
+		Erc20CustodyContractAddress: constant.EVMZeroAddress,
+		WatchUtxoTicker:             30,
+		InboundTicker:               120,
+		OutboundTicker:              12,
+		GasPriceTicker:              30,
+		OutboundScheduleInterval:    30,
+		OutboundScheduleLookahead:   100,
+		BallotThreshold:             DefaultBallotThreshold,
+		MinObserverDelegation:       DefaultMinObserverDelegation,
+		IsSupported:                 false,
+	}
+}
 func GetDefaultBtcRegtestChainParams() *ChainParams {
 	return &ChainParams{
 		ChainId:                     chains.BitcoinRegtest.ChainId,