Master (#1262)

* clear

* feat: Add everything

* fix: Commenht

app/ante/ante.go

@@ -0,0 +1,60 @@
+// Package ante provides ante handler implementations for transaction processing
+// in the Sonr blockchain. It supports both Cosmos SDK and Ethereum transactions.
+package ante
+
+import (
+	errorsmod "cosmossdk.io/errors"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	errortypes "github.com/cosmos/cosmos-sdk/types/errors"
+	authante "github.com/cosmos/cosmos-sdk/x/auth/ante"
+)
+
+// NewAnteHandler returns an ante handler responsible for attempting to route an
+// Ethereum or SDK transaction to an internal ante handler for performing
+// transaction-level processing (e.g. fee payment, signature verification) before
+// being passed onto it's respective handler.
+//
+// The handler inspects the transaction type and extension options to determine
+// the appropriate processing path:
+//   - Ethereum transactions with ExtensionOptionsEthereumTx
+//   - Cosmos SDK transactions with ExtensionOptionDynamicFeeTx
+//   - Standard Cosmos SDK transactions
+func NewAnteHandler(options HandlerOptions) sdk.AnteHandler {
+	return func(
+		ctx sdk.Context, tx sdk.Tx, sim bool,
+	) (newCtx sdk.Context, err error) {
+		var anteHandler sdk.AnteHandler
+
+		txWithExtensions, ok := tx.(authante.HasExtensionOptionsTx)
+		if ok {
+			opts := txWithExtensions.GetExtensionOptions()
+			if len(opts) > 0 {
+				switch typeURL := opts[0].GetTypeUrl(); typeURL {
+				case "/cosmos.evm.vm.v1.ExtensionOptionsEthereumTx":
+					// handle as *evmtypes.MsgEthereumTx
+					anteHandler = newMonoEVMAnteHandler(options)
+				case "/cosmos.evm.vm.v1.ExtensionOptionDynamicFeeTx":
+					// cosmos-sdk tx with dynamic fee extension
+					anteHandler = NewCosmosAnteHandler(options)
+				default:
+					return ctx, errorsmod.Wrapf(
+						errortypes.ErrUnknownExtensionOptions,
+						"rejecting tx with unsupported extension option: %s", typeURL,
+					)
+				}
+
+				return anteHandler(ctx, tx, sim)
+			}
+		}
+
+		// handle as totally normal Cosmos SDK tx
+		switch tx.(type) {
+		case sdk.Tx:
+			anteHandler = NewCosmosAnteHandler(options)
+		default:
+			return ctx, errorsmod.Wrapf(errortypes.ErrUnknownRequest, "invalid transaction type: %T", tx)
+		}
+
+		return anteHandler(ctx, tx, sim)
+	}
+}