Add sdk/ton/transaction.go

Author: krebernisak

sdk/ton/transaction.go

@@ -0,0 +1,73 @@
+package ton
+
+import (
+	"encoding/json"
+	"fmt"
+	"math/big"
+
+	"github.com/xssnick/tonutils-go/address"
+	"github.com/xssnick/tonutils-go/tvm/cell"
+
+	"github.com/smartcontractkit/mcms/types"
+)
+
+func ValidateAdditionalFields(additionalFields json.RawMessage) error {
+	fields := AdditionalFields{
+		Value: big.NewInt(0),
+	}
+	if len(additionalFields) != 0 {
+		if err := json.Unmarshal(additionalFields, &fields); err != nil {
+			return fmt.Errorf("failed to unmarshal TON additional fields: %w", err)
+		}
+	}
+
+	if err := fields.Validate(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+type AdditionalFields struct {
+	Value *big.Int `json:"value"`
+}
+
+// Validate ensures the TON-specific fields are correct
+func (f AdditionalFields) Validate() error {
+	if f.Value == nil || f.Value.Sign() < 0 {
+		return fmt.Errorf("invalid TON value: %v", f.Value)
+	}
+
+	return nil
+}
+
+func NewTransaction(
+	to address.Address,
+	body *cell.Slice,
+	value *big.Int,
+	contractType string,
+	tags []string,
+) (types.Transaction, error) {
+	additionalFields, err := json.Marshal(AdditionalFields{
+		Value: value,
+	})
+	if err != nil {
+		return types.Transaction{}, fmt.Errorf("failed to marshal additional fields: %w", err)
+	}
+
+	bodyCell, err := body.ToCell()
+	if err != nil {
+		return types.Transaction{}, fmt.Errorf("failed to convert body to cell: %w", err)
+	}
+	data := bodyCell.ToBOC()
+
+	return types.Transaction{
+		To:               to.String(),
+		Data:             data,
+		AdditionalFields: additionalFields,
+		OperationMetadata: types.OperationMetadata{
+			ContractType: contractType,
+			Tags:         tags,
+		},
+	}, nil
+}