refactor(server/v2): Update prepare & process proposal

server/v2/appmanager/appmanager.go

@@ -126,7 +126,8 @@ func (a AppManager[T]) ValidateTx(ctx context.Context, tx T) (appmanager.TxResul
 	if err != nil {
 		return appmanager.TxResult{}, err
 	}
-	return a.stf.ValidateTx(ctx, latestState, a.config.ValidateTxGasLimit, tx), nil
+	res := a.stf.ValidateTx(ctx, latestState, a.config.ValidateTxGasLimit, tx)
+	return res, res.Error
 }
 
 // Simulate runs validation and execution flow of a Tx.

server/v2/cometbft/abci.go

@@ -329,17 +329,8 @@ func (c *Consensus[T]) PrepareProposal(
 		return nil, errors.New("PrepareProposal called with invalid height")
 	}
 
-	decodedTxs := make([]T, len(req.Txs))
-	for i, tx := range req.Txs {
-		decTx, err := c.txCodec.Decode(tx)
-		if err != nil {
-			// TODO: vote extension meta data as a custom type to avoid possibly accepting invalid txs
-			// continue even if tx decoding fails
-			c.logger.Error("failed to decode tx", "err", err)
-			continue
-		}
-
-		decodedTxs[i] = decTx
+	if c.prepareProposalHandler == nil {
+		return nil, errors.New("no prepare proposal function was set")
 	}
 
 	ciCtx := contextWithCometInfo(ctx, comet.Info{
@@ -349,7 +340,7 @@ func (c *Consensus[T]) PrepareProposal(
 		LastCommit:      toCoreExtendedCommitInfo(req.LocalLastCommit),
 	})
 
-	txs, err := c.prepareProposalHandler(ciCtx, c.app, decodedTxs, req)
+	txs, err := c.prepareProposalHandler(ciCtx, c.app, c.txCodec, req)
 	if err != nil {
 		return nil, err
 	}
@@ -370,16 +361,12 @@ func (c *Consensus[T]) ProcessProposal(
 	ctx context.Context,
 	req *abciproto.ProcessProposalRequest,
 ) (*abciproto.ProcessProposalResponse, error) {
-	decodedTxs := make([]T, len(req.Txs))
-	for _, tx := range req.Txs {
-		decTx, err := c.txCodec.Decode(tx)
-		if err != nil {
-			// TODO: vote extension meta data as a custom type to avoid possibly accepting invalid txs
-			// continue even if tx decoding fails
-			c.logger.Error("failed to decode tx", "err", err)
-			continue
-		}
-		decodedTxs = append(decodedTxs, decTx)
+	if req.Height < 1 {
+		return nil, errors.New("ProcessProposal called with invalid height")
+	}
+
+	if c.processProposalHandler == nil {
+		return nil, errors.New("no process proposal function was set")
 	}
 
 	ciCtx := contextWithCometInfo(ctx, comet.Info{
@@ -389,7 +376,7 @@ func (c *Consensus[T]) ProcessProposal(
 		LastCommit:      toCoreCommitInfo(req.ProposedLastCommit),
 	})
 
-	err := c.processProposalHandler(ciCtx, c.app, decodedTxs, req)
+	err := c.processProposalHandler(ciCtx, c.app, c.txCodec, req)
 	if err != nil {
 		c.logger.Error("failed to process proposal", "height", req.Height, "time", req.Time, "hash", fmt.Sprintf("%X", req.Hash), "err", err)
 		return &abciproto.ProcessProposalResponse{

server/v2/cometbft/handlers/defaults.go

@@ -6,13 +6,12 @@ import (
 	"fmt"
 
 	abci "github.com/cometbft/cometbft/api/cometbft/abci/v1"
-	"github.com/cosmos/gogoproto/proto"
 
-	consensusv1 "cosmossdk.io/api/cosmos/consensus/v1"
 	appmanager "cosmossdk.io/core/app"
 	"cosmossdk.io/core/store"
 	"cosmossdk.io/core/transaction"
 	"cosmossdk.io/server/v2/cometbft/mempool"
+	consensustypes "cosmossdk.io/x/consensus/types"
 )
 
 type AppManager[T transaction.Tx] interface {
@@ -33,28 +32,25 @@ func NewDefaultProposalHandler[T transaction.Tx](mp mempool.Mempool[T]) *Default
 }
 
 func (h *DefaultProposalHandler[T]) PrepareHandler() PrepareHandler[T] {
-	return func(ctx context.Context, app AppManager[T], txs []T, req proto.Message) ([]T, error) {
-		abciReq, ok := req.(*abci.PrepareProposalRequest)
-		if !ok {
-			return nil, fmt.Errorf("expected abci.PrepareProposalRequest, invalid request type: %T,", req)
-		}
-
+	return func(ctx context.Context, app AppManager[T], codec transaction.Codec[T], req *abci.PrepareProposalRequest) ([]T, error) {
 		var maxBlockGas uint64
 
-		res, err := app.Query(ctx, 0, &consensusv1.QueryParamsRequest{})
+		res, err := app.Query(ctx, 0, &consensustypes.QueryParamsRequest{})
 		if err != nil {
 			return nil, err
 		}
 
-		paramsResp, ok := res.(*consensusv1.QueryParamsResponse)
+		paramsResp, ok := res.(*consensustypes.QueryParamsResponse)
 		if !ok {
-			return nil, fmt.Errorf("unexpected consensus params response type; expected: %T, got: %T", &consensusv1.QueryParamsResponse{}, res)
+			return nil, fmt.Errorf("unexpected consensus params response type; expected: %T, got: %T", &consensustypes.QueryParamsResponse{}, res)
 		}
 
 		if b := paramsResp.GetParams().Block; b != nil {
 			maxBlockGas = uint64(b.MaxGas)
 		}
 
+		txs := decodeTxs(codec, req.Txs)
+
 		defer h.txSelector.Clear()
 
 		// If the mempool is nil or NoOp we simply return the transactions
@@ -64,7 +60,7 @@ func (h *DefaultProposalHandler[T]) PrepareHandler() PrepareHandler[T] {
 		_, isNoOp := h.mempool.(mempool.NoOpMempool[T])
 		if h.mempool == nil || isNoOp {
 			for _, tx := range txs {
-				stop := h.txSelector.SelectTxForProposal(ctx, uint64(abciReq.MaxTxBytes), maxBlockGas, tx)
+				stop := h.txSelector.SelectTxForProposal(ctx, uint64(req.MaxTxBytes), maxBlockGas, tx)
 				if stop {
 					break
 				}
@@ -88,7 +84,7 @@ func (h *DefaultProposalHandler[T]) PrepareHandler() PrepareHandler[T] {
 					return nil, err
 				}
 			} else {
-				stop := h.txSelector.SelectTxForProposal(ctx, uint64(abciReq.MaxTxBytes), maxBlockGas, memTx)
+				stop := h.txSelector.SelectTxForProposal(ctx, uint64(req.MaxTxBytes), maxBlockGas, memTx)
 				if stop {
 					break
 				}
@@ -102,34 +98,31 @@ func (h *DefaultProposalHandler[T]) PrepareHandler() PrepareHandler[T] {
 }
 
 func (h *DefaultProposalHandler[T]) ProcessHandler() ProcessHandler[T] {
-	return func(ctx context.Context, app AppManager[T], txs []T, req proto.Message) error {
+	return func(ctx context.Context, app AppManager[T], codec transaction.Codec[T], req *abci.ProcessProposalRequest) error {
 		// If the mempool is nil we simply return ACCEPT,
 		// because PrepareProposal may have included txs that could fail verification.
 		_, isNoOp := h.mempool.(mempool.NoOpMempool[T])
 		if h.mempool == nil || isNoOp {
 			return nil
 		}
 
-		_, ok := req.(*abci.PrepareProposalRequest)
-		if !ok {
-			return fmt.Errorf("invalid request type: %T", req)
-		}
-
-		res, err := app.Query(ctx, 0, &consensusv1.QueryParamsRequest{})
+		res, err := app.Query(ctx, 0, &consensustypes.QueryParamsRequest{})
 		if err != nil {
 			return err
 		}
 
-		paramsResp, ok := res.(*consensusv1.QueryParamsResponse)
+		paramsResp, ok := res.(*consensustypes.QueryParamsResponse)
 		if !ok {
-			return fmt.Errorf("unexpected consensus params response type; expected: %T, got: %T", &consensusv1.QueryParamsResponse{}, res)
+			return fmt.Errorf("unexpected consensus params response type; expected: %T, got: %T", &consensustypes.QueryParamsResponse{}, res)
 		}
 
 		var maxBlockGas uint64
 		if b := paramsResp.GetParams().Block; b != nil {
 			maxBlockGas = uint64(b.MaxGas)
 		}
 
+		txs := decodeTxs(codec, req.Txs)
+
 		var totalTxGas uint64
 		for _, tx := range txs {
 			_, err := app.ValidateTx(ctx, tx)
@@ -153,18 +146,33 @@ func (h *DefaultProposalHandler[T]) ProcessHandler() ProcessHandler[T] {
 	}
 }
 
+func decodeTxs[T transaction.Tx](codec transaction.Codec[T], txsBz [][]byte) []T {
+	var txs []T
+	for _, tx := range txsBz {
+		decTx, err := codec.Decode(tx)
+		if err != nil {
+			// TODO: vote extension meta data as a custom type to avoid possibly accepting invalid txs
+			// continue even if tx decoding fails
+			continue
+		}
+
+		txs = append(txs, decTx)
+	}
+	return txs
+}
+
 // NoOpPrepareProposal defines a no-op PrepareProposal handler. It will always
 // return the transactions sent by the client's request.
 func NoOpPrepareProposal[T transaction.Tx]() PrepareHandler[T] {
-	return func(ctx context.Context, app AppManager[T], txs []T, req proto.Message) ([]T, error) {
-		return txs, nil
+	return func(ctx context.Context, app AppManager[T], codec transaction.Codec[T], req *abci.PrepareProposalRequest) ([]T, error) {
+		return decodeTxs(codec, req.Txs), nil
 	}
 }
 
 // NoOpProcessProposal defines a no-op ProcessProposal Handler. It will always
 // return ACCEPT.
 func NoOpProcessProposal[T transaction.Tx]() ProcessHandler[T] {
-	return func(context.Context, AppManager[T], []T, proto.Message) error {
+	return func(context.Context, AppManager[T], transaction.Codec[T], *abci.ProcessProposalRequest) error {
 		return nil
 	}
 }

server/v2/cometbft/handlers/handlers.go

@@ -4,7 +4,6 @@ import (
 	"context"
 
 	abci "github.com/cometbft/cometbft/api/cometbft/abci/v1"
-	"github.com/cosmos/gogoproto/proto"
 
 	"cosmossdk.io/core/store"
 	"cosmossdk.io/core/transaction"
@@ -13,11 +12,11 @@ import (
 type (
 	// PrepareHandler passes in the list of Txs that are being proposed. The app can then do stateful operations
 	// over the list of proposed transactions. It can return a modified list of txs to include in the proposal.
-	PrepareHandler[T transaction.Tx] func(context.Context, AppManager[T], []T, proto.Message) ([]T, error)
+	PrepareHandler[T transaction.Tx] func(context.Context, AppManager[T], transaction.Codec[T], *abci.PrepareProposalRequest) ([]T, error)
 
 	// ProcessHandler is a function that takes a list of transactions and returns a boolean and an error.
 	// If the verification of a transaction fails, the boolean is false and the error is non-nil.
-	ProcessHandler[T transaction.Tx] func(context.Context, AppManager[T], []T, proto.Message) error
+	ProcessHandler[T transaction.Tx] func(context.Context, AppManager[T], transaction.Codec[T], *abci.ProcessProposalRequest) error
 
 	// VerifyVoteExtensionhandler is a function type that handles the verification of a vote extension request.
 	// It takes a context, a store reader map, and a request to verify a vote extension.