diff --git a/cosmos/abci/abci.go b/cosmos/abci/abci.go
index 24456cb5a..52d32f556 100644
--- a/cosmos/abci/abci.go
+++ b/cosmos/abci/abci.go
@@ -1,3 +1,23 @@
+// SPDX-License-Identifier: BUSL-1.1
+//
+// Copyright (C) 2023, Berachain Foundation. All rights reserved.
+// Use of this software is govered by the Business Source License included
+// in the LICENSE file of this repository and at www.mariadb.com/bsl11.
+//
+// ANY USE OF THE LICENSED WORK IN VIOLATION OF THIS LICENSE WILL AUTOMATICALLY
+// TERMINATE YOUR RIGHTS UNDER THIS LICENSE FOR THE CURRENT AND ALL OTHER
+// VERSIONS OF THE LICENSED WORK.
+//
+// THIS LICENSE DOES NOT GRANT YOU ANY RIGHT IN ANY TRADEMARK OR LOGO OF
+// LICENSOR OR ITS AFFILIATES (PROVIDED THAT YOU MAY USE A TRADEMARK OR LOGO OF
+// LICENSOR AS EXPRESSLY REQUIRED BY THIS LICENSE).
+//
+// TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE LICENSED WORK IS PROVIDED ON
+// AN “AS IS” BASIS. LICENSOR HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS,
+// EXPRESS OR IMPLIED, INCLUDING (WITHOUT LIMITATION) WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, AND
+// TITLE.
+
 package abci
 
 import (
diff --git a/cosmos/abci/prepare/default.go b/cosmos/abci/prepare/default.go
index 1acefa3f8..7cb15dd74 100644
--- a/cosmos/abci/prepare/default.go
+++ b/cosmos/abci/prepare/default.go
@@ -1,9 +1,30 @@
+// SPDX-License-Identifier: BUSL-1.1
+//
+// Copyright (C) 2023, Berachain Foundation. All rights reserved.
+// Use of this software is govered by the Business Source License included
+// in the LICENSE file of this repository and at www.mariadb.com/bsl11.
+//
+// ANY USE OF THE LICENSED WORK IN VIOLATION OF THIS LICENSE WILL AUTOMATICALLY
+// TERMINATE YOUR RIGHTS UNDER THIS LICENSE FOR THE CURRENT AND ALL OTHER
+// VERSIONS OF THE LICENSED WORK.
+//
+// THIS LICENSE DOES NOT GRANT YOU ANY RIGHT IN ANY TRADEMARK OR LOGO OF
+// LICENSOR OR ITS AFFILIATES (PROVIDED THAT YOU MAY USE A TRADEMARK OR LOGO OF
+// LICENSOR AS EXPRESSLY REQUIRED BY THIS LICENSE).
+//
+// TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE LICENSED WORK IS PROVIDED ON
+// AN “AS IS” BASIS. LICENSOR HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS,
+// EXPRESS OR IMPLIED, INCLUDING (WITHOUT LIMITATION) WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, AND
+// TITLE.
+
 package prepare
 
 import (
 	"errors"
 
 	abci "github.com/cometbft/cometbft/abci/types"
+
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkmempool "github.com/cosmos/cosmos-sdk/types/mempool"
 )
@@ -12,7 +33,7 @@ type (
 	// ProposalTxVerifier defines the interface that is implemented by BaseApp,
 	// that any custom ABCI PrepareProposal and ProcessProposal handler can use
 	// to verify a transaction.
-	ProposalTxVerifier interface {
+	TxVerifier interface {
 		PrepareProposalVerifyTx(tx sdk.Tx) ([]byte, error)
 		ProcessProposalVerifyTx(txBz []byte) (sdk.Tx, error)
 	}
@@ -25,17 +46,20 @@ type (
 
 type Handler struct {
 	mempool    sdkmempool.Mempool
-	txVerifier ProposalTxVerifier
+	txVerifier TxVerifier
 }
 
-func NewHandler(mempool sdkmempool.Mempool, txVerifier ProposalTxVerifier) Handler {
+func NewHandler(mempool sdkmempool.Mempool, txVerifier TxVerifier) Handler {
 	return Handler{
-		mempool:    mempool,	
+		mempool:    mempool,
 		txVerifier: txVerifier,
 	}
 }
 
-func (h *Handler) PrepareProposal(ctx sdk.Context, req *abci.RequestPrepareProposal) (*abci.ResponsePrepareProposal, error) {
+//nolint:gocognit // from sdk.
+func (h *Handler) PrepareProposal(
+	ctx sdk.Context, req *abci.RequestPrepareProposal,
+) (*abci.ResponsePrepareProposal, error) {
 	var maxBlockGas int64
 	if b := ctx.ConsensusParams().Block; b != nil {
 		maxBlockGas = b.MaxGas
@@ -57,9 +81,9 @@ func (h *Handler) PrepareProposal(ctx sdk.Context, req *abci.RequestPreparePropo
 		// valid. But some mempool implementations may insert invalid txs, so we
 		// check again.
 		bz, err := h.txVerifier.PrepareProposalVerifyTx(memTx)
-		if err != nil {
-			err := h.mempool.Remove(memTx)
-			if err != nil && !errors.Is(err, sdkmempool.ErrTxNotFound) {
+		if err != nil { //nolint:nestif // from sdk.
+			err2 := h.mempool.Remove(memTx)
+			if err2 != nil && !errors.Is(err2, sdkmempool.ErrTxNotFound) {
 				return nil, err
 			}
 		} else {
@@ -89,7 +113,8 @@ func (h *Handler) PrepareProposal(ctx sdk.Context, req *abci.RequestPreparePropo
 
 			// Check if we've reached capacity. If so, we cannot select any more
 			// transactions.
-			if totalTxBytes >= req.MaxTxBytes || (maxBlockGas > 0 && (totalTxGas >= uint64(maxBlockGas))) {
+			if totalTxBytes >= req.MaxTxBytes ||
+				(maxBlockGas > 0 && (totalTxGas >= uint64(maxBlockGas))) {
 				break
 			}
 		}
diff --git a/cosmos/abci/process/default.go b/cosmos/abci/process/default.go
index 268107f0a..1cc77474d 100644
--- a/cosmos/abci/process/default.go
+++ b/cosmos/abci/process/default.go
@@ -1,7 +1,28 @@
+// SPDX-License-Identifier: BUSL-1.1
+//
+// Copyright (C) 2023, Berachain Foundation. All rights reserved.
+// Use of this software is govered by the Business Source License included
+// in the LICENSE file of this repository and at www.mariadb.com/bsl11.
+//
+// ANY USE OF THE LICENSED WORK IN VIOLATION OF THIS LICENSE WILL AUTOMATICALLY
+// TERMINATE YOUR RIGHTS UNDER THIS LICENSE FOR THE CURRENT AND ALL OTHER
+// VERSIONS OF THE LICENSED WORK.
+//
+// THIS LICENSE DOES NOT GRANT YOU ANY RIGHT IN ANY TRADEMARK OR LOGO OF
+// LICENSOR OR ITS AFFILIATES (PROVIDED THAT YOU MAY USE A TRADEMARK OR LOGO OF
+// LICENSOR AS EXPRESSLY REQUIRED BY THIS LICENSE).
+//
+// TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE LICENSED WORK IS PROVIDED ON
+// AN “AS IS” BASIS. LICENSOR HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS,
+// EXPRESS OR IMPLIED, INCLUDING (WITHOUT LIMITATION) WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, AND
+// TITLE.
+
 package proposal
 
 import (
 	abci "github.com/cometbft/cometbft/abci/types"
+
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
 
@@ -9,7 +30,7 @@ type (
 	// ProposalTxVerifier defines the interface that is implemented by BaseApp,
 	// that any custom ABCI PrepareProposal and ProcessProposal handler can use
 	// to verify a transaction.
-	ProposalTxVerifier interface {
+	TxVerifier interface {
 		PrepareProposalVerifyTx(tx sdk.Tx) ([]byte, error)
 		ProcessProposalVerifyTx(txBz []byte) (sdk.Tx, error)
 	}
@@ -21,16 +42,18 @@ type (
 )
 
 type Handler struct {
-	txVerifier ProposalTxVerifier
+	txVerifier TxVerifier
 }
 
-func NewHandler(txVerifier ProposalTxVerifier) Handler {
+func NewHandler(txVerifier TxVerifier) Handler {
 	return Handler{
 		txVerifier: txVerifier,
 	}
 }
 
-func (h *Handler) ProcessProposal(ctx sdk.Context, req *abci.RequestProcessProposal) (*abci.ResponseProcessProposal, error) {
+func (h *Handler) ProcessProposal(
+	ctx sdk.Context, req *abci.RequestProcessProposal,
+) (*abci.ResponseProcessProposal, error) {
 	var totalTxGas uint64
 
 	var maxBlockGas int64
@@ -41,7 +64,10 @@ func (h *Handler) ProcessProposal(ctx sdk.Context, req *abci.RequestProcessPropo
 	for _, txBytes := range req.Txs {
 		tx, err := h.txVerifier.ProcessProposalVerifyTx(txBytes)
 		if err != nil {
-			return &abci.ResponseProcessProposal{Status: abci.ResponseProcessProposal_REJECT}, nil
+			//nolint:nolintlint,nilerr // intentional.
+			return &abci.ResponseProcessProposal{
+				Status: abci.ResponseProcessProposal_REJECT,
+			}, nil
 		}
 
 		if maxBlockGas > 0 {