fee grant support

cw-relayer/cmd/cw-relayer.go

@@ -143,6 +143,7 @@ func cwRelayerCmdHandler(cmd *cobra.Command, args []string) error {
 		cfg.Account.AccPrefix,
 		cfg.GasAdjustment,
 		cfg.GasPrices,
+		cfg.FeeGrant.Granter,
 	)
 	if err != nil {
 		return err

cw-relayer/config/config.go

@@ -29,10 +29,11 @@ var (
 type (
 	// Config defines all necessary cw-relayer configuration parameters.
 	Config struct {
-		Account Account       `mapstructure:"account" validate:"required,gt=0,dive,required"`
-		Keyring Keyring       `mapstructure:"keyring" validate:"required,gt=0,dive,required"`
-		RPC     RPC           `mapstructure:"rpc" validate:"required,gt=0,dive,required"`
-		Restart RestartConfig `mapstructure:"restart" validate:"required"`
+		Account  Account        `mapstructure:"account" validate:"required,gt=0,dive,required"`
+		Keyring  Keyring        `mapstructure:"keyring" validate:"required,gt=0,dive,required"`
+		RPC      RPC            `mapstructure:"rpc" validate:"required,gt=0,dive,required"`
+		Restart  RestartConfig  `mapstructure:"restart" validate:"required"`
+		FeeGrant FeeGrantConfig `mapstructure:"fee_grant" validate:"dive"`
 
 		ProviderTimeout string `mapstructure:"provider_timeout"`
 		ContractAddress string `mapstructure:"contract_address"`
@@ -87,6 +88,10 @@ type (
 		SkipError bool   `mapstructure:"skip_error"`
 	}
 
+	FeeGrantConfig struct {
+		Granter string `mapstructure:"granter" validate:"omitempty,required"`
+	}
+
 	// RPC defines RPC configuration of both the wasmd chain and Tendermint nodes.
 	RPC struct {
 		TMRPCEndpoint string `mapstructure:"tmrpc_endpoint" validate:"required"`
@@ -160,5 +165,7 @@ func ParseConfig(configPath string) (Config, error) {
 		cfg.MaxRetries = defaultRetries
 	}
 
+	fmt.Println()
+
 	return cfg, cfg.Validate()
 }

cw-relayer/relayer/client/client.go

@@ -48,6 +48,8 @@ type (
 		GasAdjustment     float64
 		KeyringPassphrase string
 		ChainHeight       *ChainHeight
+		feeGranter        sdk.AccAddress
+		feeGrantEnabled   bool
 	}
 
 	passReader struct {
@@ -80,6 +82,7 @@ func NewRelayerClient(
 	accPrefix string,
 	gasAdjustment float64,
 	GasPrices string,
+	granter string,
 ) (RelayerClient, error) {
 	config := sdk.GetConfig()
 	config.SetBech32PrefixForAccount(accPrefix, accPrefix+sdk.PrefixPublic)
@@ -106,6 +109,16 @@ func NewRelayerClient(
 		QueryRpc:          queryEndpoint,
 	}
 
+	if len(granter) > 0 {
+		feeGranterAddr, err := sdk.AccAddressFromBech32(granter)
+		if err != nil {
+			return RelayerClient{}, err
+		}
+
+		relayerClient.feeGranter = feeGranterAddr
+		relayerClient.feeGrantEnabled = true
+	}
+
 	clientCtx, err := relayerClient.CreateClientContext()
 	if err != nil {
 		return RelayerClient{}, err
@@ -350,6 +363,10 @@ func (oc RelayerClient) CreateTxFactory() (tx.Factory, error) {
 		WithSignMode(signing.SignMode_SIGN_MODE_DIRECT).
 		WithSimulateAndExecute(true)
 
+	if oc.feeGrantEnabled {
+		txFactory = txFactory.WithFeeGranter(oc.feeGranter)
+	}
+
 	return txFactory, nil
 }