fix(assets): allow native chain to be registered (#200)

* fix(assets): allow native chain to be registered

* fix(test): remove invalid test

precompiles/assets/tx.go

@@ -216,6 +216,10 @@ func (p Precompile) IsRegisteredClientChain(
 	if err != nil {
 		return nil, err
 	}
+	if clientChainID == 0 {
+		// explicitly return false for client chain ID 0 to prevent `setPeer` calls
+		return method.Outputs.Pack(true, false)
+	}
 	exists := p.assetsKeeper.ClientChainExists(ctx, uint64(clientChainID))
 	return method.Outputs.Pack(true, exists)
 }

x/assets/types/genesis.go

@@ -45,14 +45,6 @@ func (gs GenesisState) ValidateClientChains() (map[uint64]struct{}, error) {
 				i,
 			)
 		}
-		// this is our primary method of cross-chain communication.
-		if info.LayerZeroChainID == 0 {
-			return errorsmod.Wrapf(
-				ErrInvalidGenesisData,
-				"nil LayerZeroChainID for chain %s",
-				info.Name,
-			)
-		}
 		// the address length is used to convert from bytes32 to address.
 		if info.AddressLength == 0 {
 			return errorsmod.Wrapf(

x/assets/types/genesis_test.go

@@ -105,22 +105,6 @@ func (suite *GenesisTestSuite) TestValidateGenesis() {
 			},
 			expPass: false,
 		},
-		{
-			name: "invalid genesis due to zero layer zero chain id",
-			genState: &types.GenesisState{
-				Params: types.DefaultParams(),
-				ClientChains: []types.ClientChainInfo{
-					ethClientChain,
-				},
-			},
-			malleate: func(gs *types.GenesisState) {
-				gs.ClientChains[0].LayerZeroChainID = 0
-			},
-			unmalleate: func(gs *types.GenesisState) {
-				gs.ClientChains[0].LayerZeroChainID = 101
-			},
-			expPass: false,
-		},
 		{
 			name: "invalid genesis due to zero address length",
 			genState: &types.GenesisState{