diff --git a/full-stack-asset-transfer-guide/contracts/asset-transfer-go/go.mod b/full-stack-asset-transfer-guide/contracts/asset-transfer-go/go.mod
index 83fba2d1..1e3470bc 100644
--- a/full-stack-asset-transfer-guide/contracts/asset-transfer-go/go.mod
+++ b/full-stack-asset-transfer-guide/contracts/asset-transfer-go/go.mod
@@ -5,16 +5,20 @@ go 1.23.0
 require (
 	github.com/hyperledger/fabric-chaincode-go/v2 v2.0.0
 	github.com/hyperledger/fabric-contract-api-go/v2 v2.2.0
+	github.com/hyperledger/fabric-protos-go-apiv2 v0.3.4
+	github.com/stretchr/testify v1.10.0
+	google.golang.org/protobuf v1.36.1
 )
 
 require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-openapi/jsonpointer v0.21.0 // indirect
 	github.com/go-openapi/jsonreference v0.21.0 // indirect
 	github.com/go-openapi/spec v0.21.0 // indirect
 	github.com/go-openapi/swag v0.23.0 // indirect
-	github.com/hyperledger/fabric-protos-go-apiv2 v0.3.4 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
@@ -23,6 +27,5 @@ require (
 	golang.org/x/text v0.17.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 // indirect
 	google.golang.org/grpc v1.67.0 // indirect
-	google.golang.org/protobuf v1.36.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/asset.go b/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/asset.go
index b777b32f..d27f2ad2 100644
--- a/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/asset.go
+++ b/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/asset.go
@@ -1,18 +1,10 @@
-/*
- * SPDX-License-Identifier: Apache-2.0
- */
-
 package main
 
-// OwnerIdentifier represents the owner of an asset with their organisation MSP ID and user identifier.
-// Fields are lowercase to match the TypeScript serialisation format.
 type OwnerIdentifier struct {
 	Org  string `json:"org"`
 	User string `json:"user"`
 }
 
-// Asset describes the details of an asset stored in the world state.
-// Fields are defined in alphabetical order to produce deterministic JSON serialisation.
 type Asset struct {
 	AppraisedValue int    `json:"AppraisedValue"`
 	Color          string `json:"Color"`
diff --git a/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/asset_transfer.go b/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/asset_transfer.go
index 41582693..823715ca 100644
--- a/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/asset_transfer.go
+++ b/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/asset_transfer.go
@@ -25,7 +25,7 @@ func (s *SmartContract) CreateAsset(ctx contractapi.TransactionContextInterface,
 		return err
 	}
 	if exists {
-		return fmt.Errorf("the asset %s already exists", id)
+		return fmt.Errorf("The asset %s already exists", id)
 	}
 
 	ownerID, err := clientIdentifier(ctx, owner)
@@ -96,7 +96,7 @@ func (s *SmartContract) UpdateAsset(ctx contractapi.TransactionContextInterface,
 		return err
 	}
 	if !ok {
-		return fmt.Errorf("only owner can update assets")
+		return fmt.Errorf("Only owner can update assets")
 	}
 
 	// Owner is intentionally preserved; use TransferAsset to change owner.
@@ -141,7 +141,7 @@ func (s *SmartContract) DeleteAsset(ctx contractapi.TransactionContextInterface,
 		return err
 	}
 	if !ok {
-		return fmt.Errorf("only owner can delete assets")
+		return fmt.Errorf("Only owner can delete assets")
 	}
 
 	if err := ctx.GetStub().DelState(id); err != nil {
@@ -180,7 +180,7 @@ func (s *SmartContract) TransferAsset(ctx contractapi.TransactionContextInterfac
 		return err
 	}
 	if !ok {
-		return fmt.Errorf("only owner can transfer assets")
+		return fmt.Errorf("Only owner can transfer assets")
 	}
 
 	newOwnerID := OwnerIdentifier{Org: newOwnerOrg, User: newOwner}
@@ -241,7 +241,7 @@ func readAsset(ctx contractapi.TransactionContextInterface, id string) ([]byte,
 		return nil, fmt.Errorf("failed to read from world state: %v", err)
 	}
 	if assetBytes == nil {
-		return nil, fmt.Errorf("sorry, asset %s has not been created", id)
+		return nil, fmt.Errorf("Sorry, asset %s has not been created", id)
 	}
 
 	return assetBytes, nil
diff --git a/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/main.go b/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/main.go
index 529e27e3..44f3416a 100644
--- a/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/main.go
+++ b/full-stack-asset-transfer-guide/contracts/asset-transfer-go/src/main.go
@@ -1,7 +1,3 @@
-/*
- * SPDX-License-Identifier: Apache-2.0
- */
-
 package main
 
 import (