Update go version and libraries

.github/workflows/check_with_mesh_cli.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           python-version: 3.11
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install dependencies
         run: |

.github/workflows/check_with_mesh_cli_on_localnet.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           python-version: 3.11
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install dependencies
         run: |

.github/workflows/check_with_mesh_cli_on_mainnet.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           python-version: 3.11
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install dependencies
         run: |

.github/workflows/code-coverage.yml

@@ -15,10 +15,10 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
     name: Build
     steps:
-      - name: Set up Go 1.23
-        uses: actions/setup-go@v5
+      - name: Set up Go 1.26
+        uses: actions/setup-go@v6
         with:
-          go-version: 1.23.6
+          go-version: 1.26.6
         id: go
 
       - name: Check out code into the Go module directory

.github/workflows/golangci-lint.yml

@@ -11,17 +11,17 @@ jobs:
     name: golangci linter
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
-          go-version: 1.23.6
-      - uses: actions/checkout@v4
+          go-version: 1.26.6
+      - uses: actions/checkout@v6
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v7
         with:
-          version: v1.64.5
+          version: v2.12.2
 
           # Optional: golangci-lint command line arguments.
-          args: --timeout 10m0s --max-issues-per-linter 0 --max-same-issues 0 --print-issued-lines
+          args: --timeout 10m0s --max-issues-per-linter 0 --max-same-issues 0
 
           # Optional: show only new issues if it's a pull request. The default value is `false`.
           only-new-issues: true

.github/workflows/pr-build.yml

@@ -13,9 +13,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set up Go 1.x
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
-          go-version: 1.23.6
+          go-version: 1.26.6
         id: go
 
       - name: Check out code into the Go module directory

.github/workflows/regularly_check_devnet.yml

@@ -17,7 +17,7 @@ jobs:
               with:
                   python-version: 3.11
 
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
 
             - name: Install dependencies
               run: |

.github/workflows/regularly_check_mainnet.yml

@@ -17,7 +17,7 @@ jobs:
               with:
                   python-version: 3.11
 
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
 
             - name: Install dependencies
               run: |

.github/workflows/regularly_check_testnet.yml

@@ -15,7 +15,7 @@ jobs:
               with:
                   python-version: 3.11
 
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
 
             - name: Install dependencies
               run: |

go.mod

@@ -1,16 +1,17 @@
 module github.com/multiversx/mx-chain-rosetta
 
-go 1.23.6
+go 1.26
 
 require (
-	github.com/coinbase/rosetta-sdk-go v0.8.3
-	github.com/coinbase/rosetta-sdk-go/types v1.0.0
+	github.com/coinbase/rosetta-sdk-go v0.12.0
+	github.com/coinbase/rosetta-sdk-go/types v1.7.2
 	github.com/gin-gonic/gin v1.10.0
 	github.com/multiversx/mx-chain-core-go v1.4.2-0.20260219122727-014ae9f9311f
 	github.com/multiversx/mx-chain-go v1.11.1
 	github.com/multiversx/mx-chain-logger-go v1.1.0
 	github.com/multiversx/mx-chain-proxy-go v1.4.0
 	github.com/multiversx/mx-chain-storage-go v1.1.0
+	github.com/multiversx/mx-chain-vm-common-go v1.6.0
 	github.com/stretchr/testify v1.10.0
 	github.com/urfave/cli v1.22.16
 )
@@ -45,7 +46,6 @@ require (
 	github.com/multiversx/mx-chain-communication-go v1.3.0 // indirect
 	github.com/multiversx/mx-chain-crypto-go v1.3.0 // indirect
 	github.com/multiversx/mx-chain-es-indexer-go v1.9.3-0.20260112102658-97d6a0ceb5f6 // indirect
-	github.com/multiversx/mx-chain-vm-common-go v1.6.0 // indirect
 	github.com/pelletier/go-toml v1.9.3 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
 	github.com/pkg/errors v0.9.1 // indirect

go.sum

@@ -28,10 +28,10 @@ github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/
 github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w=
 github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg=
 github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY=
-github.com/coinbase/rosetta-sdk-go v0.8.3 h1:IYqd+Ser5NVh0s7p8p2Ir82iCvi75E1l0NH2H4NEr0Y=
-github.com/coinbase/rosetta-sdk-go v0.8.3/go.mod h1:ChOHc+BNq7zqJDDkui0DA124GOvlAiRbdgAc1U9GMDQ=
-github.com/coinbase/rosetta-sdk-go/types v1.0.0 h1:jpVIwLcPoOeCR6o1tU+Xv7r5bMONNbHU7MuEHboiFuA=
-github.com/coinbase/rosetta-sdk-go/types v1.0.0/go.mod h1:eq7W2TMRH22GTW0N0beDnN931DW0/WOI1R2sdHNHG4c=
+github.com/coinbase/rosetta-sdk-go v0.12.0 h1:x3T5ScBw0J5fmu9Nkx4QNI+s8NqvSYupb39RIOm5HjQ=
+github.com/coinbase/rosetta-sdk-go v0.12.0/go.mod h1:rdzdWYdC3AKsR7IDXKFu7HW7sa9q+czdYGxw44vNRSQ=
+github.com/coinbase/rosetta-sdk-go/types v1.7.2 h1:iRt/R+Esn4GNyd2cijjKPiIine/nAlUaCleaAdj8d+A=
+github.com/coinbase/rosetta-sdk-go/types v1.7.2/go.mod h1:bN5JAIEG/dGZNnYzsfizeHhzFOf9s5rkJoaNM/7L5QI=
 github.com/cpuguy83/go-md2man/v2 v2.0.5 h1:ZtcqGrnekaHpVLArFSe4HK5DoKx1T0rq2DwVB0alcyc=
 github.com/cpuguy83/go-md2man/v2 v2.0.5/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

server/provider/currenciesProvider.go

@@ -49,7 +49,7 @@ func (provider *currenciesProvider) GetCustomCurrencies() []resources.Currency {
 	return provider.customCurrencies
 }
 
-// GetCustomCurrencyBySymbol gets a custom currency (ESDT) by symbol (identifier)
+// GetCustomCurrenciesSymbols returns the enabled custom currency (ESDT) symbols.
 func (provider *currenciesProvider) GetCustomCurrenciesSymbols() []string {
 	return provider.customCurrenciesSymbols
 }

server/services/accountService.go

@@ -109,3 +109,8 @@ func (service *accountService) getNativeSymbol() string {
 func (service *accountService) AccountCoins(_ context.Context, _ *types.AccountCoinsRequest) (*types.AccountCoinsResponse, *types.Error) {
 	return nil, service.errFactory.newErr(ErrNotImplemented)
 }
+
+// AllAccountBalances implements the /account/all-balances.
+func (service *accountService) AllAccountBalances(_ context.Context, _ *types.AllAccountBalancesRequest) (*types.AllAccountBalancesResponse, *types.Error) {
+	return nil, service.errFactory.newErr(ErrNotImplemented)
+}

server/services/constructionOptions.go

@@ -2,6 +2,7 @@ package services
 
 import (
 	"errors"
+	"math/big"
 )
 
 type constructionOptions struct {
@@ -40,6 +41,19 @@ func (options *constructionOptions) coalesceGasPrice(minGasPrice uint64) uint64
 	return options.GasPrice
 }
 
+func validateTransferAmount(amount string) error {
+	bigAmount, ok := big.NewInt(0).SetString(amount, 10)
+	if !ok {
+		return errors.New("option 'amount' is not a valid integer")
+	}
+
+	if bigAmount.Sign() <= 0 {
+		return errors.New("option 'amount' must be a positive integer")
+	}
+
+	return nil
+}
+
 func (options *constructionOptions) validate(nativeCurrencySymbol string) error {
 	if len(options.Sender) == 0 {
 		return errors.New("missing option: 'sender'")

server/services/constructionService.go

@@ -414,3 +414,83 @@ func (service *constructionService) ConstructionSubmit(
 		},
 	}, nil
 }
+
+// ConstructionPreprocessOperations will validate the requested operations and options,
+// prepare the corresponding transaction (handling native or custom currency transfers)
+// and return the resulting operations along with the maximum fee and metadata required
+// for the subsequent payload construction
+func (service *constructionService) ConstructionPreprocessOperations(
+	_ context.Context,
+	request *types.ConstructionPreprocessOperationsRequest,
+) (*types.ConstructionPreprocessOperationsResponse, *types.Error) {
+	log.Debug("constructionService.ConstructionPreprocessOperations()", "construct_op", request.ConstructOp, "from_address", request.FromAddress)
+
+	requestOptions, err := newConstructionOptions(request.Options)
+	if err != nil {
+		return nil, service.errFactory.newErrWithOriginal(ErrConstruction, err)
+	}
+	if request.FromAddress != nil && len(*request.FromAddress) > 0 && len(requestOptions.Sender) == 0 {
+		requestOptions.Sender = *request.FromAddress
+	}
+
+	isNative := service.extension.isNativeCurrencySymbol(requestOptions.CurrencySymbol)
+	if !isNative && !service.provider.HasCustomCurrency(requestOptions.CurrencySymbol) {
+		return nil, service.errFactory.newErrWithOriginal(ErrConstruction, fmt.Errorf("unsupported currency: %s", requestOptions.CurrencySymbol))
+	}
+
+	nativeCurrencySymbol := service.extension.getNativeCurrencySymbol()
+	if request.ConstructOp == "transfer" {
+		err = requestOptions.validate(nativeCurrencySymbol)
+		if err != nil {
+			return nil, service.errFactory.newErrWithOriginal(ErrConstruction, err)
+		}
+		err = validateTransferAmount(requestOptions.Amount)
+		if err != nil {
+			return nil, service.errFactory.newErrWithOriginal(ErrConstruction, err)
+		}
+	} else {
+		return nil, service.errFactory.newErrWithOriginal(ErrNotImplemented, fmt.Errorf("unsupported construct_op: %s", request.ConstructOp))
+	}
+
+	tx := &data.Transaction{
+		Sender:   requestOptions.Sender,
+		Receiver: requestOptions.Receiver,
+		Value:    requestOptions.Amount,
+		Data:     requestOptions.Data,
+	}
+
+	if !isNative {
+		tx.Value = amountZero
+		tx.Data = service.computeDataForCustomCurrencyTransfer(requestOptions.CurrencySymbol, requestOptions.Amount)
+	} else if isCustomCurrencyTransfer(string(tx.Data)) {
+		return nil, service.errFactory.newErrWithOriginal(
+			ErrConstruction,
+			errors.New("for native currency transfers, option 'data' must not encode a custom currency (ESDT) transfer"),
+		)
+	}
+
+	operations, err := service.createOperationsFromPreparedTx(tx)
+	if err != nil {
+		return nil, service.errFactory.newErrWithOriginal(ErrConstruction, err)
+	}
+
+	_, gasLimit, gasPrice, errTyped := service.computeFeeComponents(requestOptions, tx.Data)
+	if errTyped != nil {
+		return nil, errTyped
+	}
+
+	requestOptions.GasLimit = gasLimit
+	requestOptions.GasPrice = gasPrice
+
+	maxFee := service.computeMaxFee(tx.Data, gasLimit, gasPrice)
+
+	metadataBytes, err := json.Marshal(requestOptions)
+	if err != nil {
+		return nil, service.errFactory.newErrWithOriginal(ErrConstruction, err)
+	}
+	return &types.ConstructionPreprocessOperationsResponse{
+		Operations: operations,
+		MaxFee:     service.extension.valueToNativeAmount(maxFee.String()),
+		Metadata:   new(string(metadataBytes)),
+	}, nil
+}

server/services/constructionServiceFee.go

@@ -36,6 +36,20 @@ func (service *constructionService) computeFeeComponents(options *constructionOp
 	return fee, gasLimit, gasPrice, nil
 }
 
+// computeMaxFee returns the maximum fee chargeable for a transaction built with the given options,
+// taking into account the user-provided gas limit, so it stays consistent with the metadata returned
+// to the client. Following the protocol's gas categorization (see SplitTxGasInCategoriesInEpoch),
+// movement gas is MinGasLimit + GasPerDataByte * len(data), charged at the base gas price, while all
+// remaining gas is processing gas, charged with the gas price modifier.
+func (service *constructionService) computeMaxFee(computedData []byte, gasLimit uint64, gasPrice uint64) *big.Int {
+	networkConfig := service.provider.GetNetworkConfig()
+
+	movementGasLimit := networkConfig.MinGasLimit + networkConfig.GasPerDataByte*uint64(len(computedData))
+	processingGasLimit := gasLimit - movementGasLimit
+
+	return computeFee(movementGasLimit, processingGasLimit, gasPrice, networkConfig.GasPriceModifier)
+}
+
 func computeFee(movementGasLimit uint64, executionGasLimit uint64, gasPrice uint64, gasPriceModifier float64) *big.Int {
 	movementFee := multiplyUint64(movementGasLimit, gasPrice)
 	executionGasPrice := uint64(float64(gasPrice) * gasPriceModifier)