Master (#1262)

* clear

* feat: Add everything

* fix: Commenht

app/ante/ucan_gasless.go

@@ -0,0 +1,29 @@
+package ante
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+// UCANGaslessDecorator allows gasless transactions for UCAN-authorized operations
+type UCANGaslessDecorator struct {
+	feeDecorator sdk.AnteDecorator
+}
+
+// NewUCANGaslessDecorator creates a new UCAN gasless decorator
+func NewUCANGaslessDecorator(feeDecorator sdk.AnteDecorator) UCANGaslessDecorator {
+	return UCANGaslessDecorator{
+		feeDecorator: feeDecorator,
+	}
+}
+
+// AnteHandle conditionally skips fee deduction for UCAN gasless transactions
+func (ugd UCANGaslessDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error) {
+	// Check if transaction is marked as UCAN gasless
+	if ctx.Value("gasless_ucan") != nil {
+		// Skip fee deduction for gasless UCAN transaction
+		return next(ctx, tx, simulate)
+	}
+
+	// Apply normal fee deduction
+	return ugd.feeDecorator.AnteHandle(ctx, tx, simulate, next)
+}