Master (#1262)

* clear

* feat: Add everything

* fix: Commenht

app/ante/ante_cosmos.go

@@ -0,0 +1,107 @@
+package ante
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/x/auth/ante"
+	sdkvesting "github.com/cosmos/cosmos-sdk/x/auth/vesting/types"
+	evmoscosmosante "github.com/cosmos/evm/ante/cosmos"
+	evmante "github.com/cosmos/evm/ante/evm"
+	evmtypes "github.com/cosmos/evm/x/vm/types"
+
+	circuitante "cosmossdk.io/x/circuit/ante"
+	ibcante "github.com/cosmos/ibc-go/v8/modules/core/ante"
+)
+
+// NewCosmosAnteHandler creates the default ante handler for Cosmos SDK transactions.
+// It sets up a chain of decorators that perform various checks and operations:
+//   - Rejects Ethereum transactions in Cosmos context
+//   - Enforces authz limitations
+//   - Sets up transaction context
+//   - Validates basic transaction properties
+//   - Handles WebAuthn gasless transactions
+//   - Handles gas consumption and fee deduction
+//   - Performs signature verification
+//   - Manages account sequences
+//   - Handles IBC-specific checks
+func NewCosmosAnteHandler(options HandlerOptions) sdk.AnteHandler {
+	// Determine if we should use enhanced gasless mode
+	// Enhanced mode allows address generation from credentials for true gasless onboarding
+	enhancedGaslessMode := options.EnableEnhancedGasless
+
+	// Build the decorator chain
+	decorators := []sdk.AnteDecorator{
+		// WebAuthn bypass - must be first to intercept WebAuthn transactions
+		NewWebAuthnBypassDecorator(),
+		evmoscosmosante.NewRejectMessagesDecorator(), // reject MsgEthereumTxs
+		evmoscosmosante.NewAuthzLimiterDecorator( // disable the Msg types that cannot be included on an authz.MsgExec msgs field
+			sdk.MsgTypeURL(&evmtypes.MsgEthereumTx{}),
+			sdk.MsgTypeURL(&sdkvesting.MsgCreateVestingAccount{}),
+		),
+
+		ante.NewSetUpContextDecorator(),
+		circuitante.NewCircuitBreakerDecorator(options.CircuitKeeper),
+		ante.NewExtensionOptionsDecorator(options.ExtensionOptionChecker),
+		ante.NewValidateBasicDecorator(),
+		ante.NewTxTimeoutHeightDecorator(),
+		ante.NewValidateMemoDecorator(options.AccountKeeper),
+
+		// UCAN validation - must come before fee deduction for gasless support
+		NewConditionalUCANDecorator(NewUCANDecorator()),
+		evmoscosmosante.NewMinGasPriceDecorator(
+			options.FeeMarketKeeper,
+			options.EvmKeeper,
+			options.ControlPanelKeeper,
+		),
+		ante.NewConsumeGasForTxSizeDecorator(options.AccountKeeper),
+
+		// WebAuthn gasless transaction support - must come before fee deduction
+		// Enhanced mode allows true gasless onboarding without pre-existing accounts
+		NewWebAuthnGaslessDecorator(options.AccountKeeper, options.DidKeeper, enhancedGaslessMode),
+
+		// Conditional fee deduction - skips fees for gasless WebAuthn and UCAN
+		NewUCANGaslessDecorator(
+			NewConditionalFeeDecorator(ante.NewDeductFeeDecorator(
+				options.AccountKeeper,
+				options.BankKeeper,
+				options.FeegrantKeeper,
+				options.TxFeeChecker,
+			)),
+		),
+	}
+
+	// Add signature verification decorators
+	// In enhanced gasless mode, we wrap these to be conditional
+	if enhancedGaslessMode {
+		// Conditional decorators that skip verification for gasless transactions
+		decorators = append(
+			decorators,
+			NewConditionalPubKeyDecorator(ante.NewSetPubKeyDecorator(options.AccountKeeper)),
+			NewConditionalSigCountDecorator(
+				ante.NewValidateSigCountDecorator(options.AccountKeeper),
+			),
+			NewConditionalSigGasDecorator(
+				ante.NewSigGasConsumeDecorator(options.AccountKeeper, options.SigGasConsumer),
+			),
+			NewConditionalSignatureDecorator(
+				ante.NewSigVerificationDecorator(options.AccountKeeper, options.SignModeHandler),
+			),
+		)
+	} else {
+		// Standard signature verification decorators
+		decorators = append(decorators,
+			ante.NewSetPubKeyDecorator(options.AccountKeeper),
+			ante.NewValidateSigCountDecorator(options.AccountKeeper),
+			ante.NewSigGasConsumeDecorator(options.AccountKeeper, options.SigGasConsumer),
+			ante.NewSigVerificationDecorator(options.AccountKeeper, options.SignModeHandler),
+		)
+	}
+
+	// Add remaining decorators
+	decorators = append(decorators,
+		ante.NewIncrementSequenceDecorator(options.AccountKeeper),
+		ibcante.NewRedundantRelayDecorator(options.IBCKeeper),
+		evmante.NewGasWantedDecorator(options.EvmKeeper, options.FeeMarketKeeper),
+	)
+
+	return sdk.ChainAnteDecorators(decorators...)
+}