Wallet to expose CreateMessage function

wallet/msg_builder.go

@@ -0,0 +1,67 @@
+package wallet
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+
+	"github.com/tonkeeper/tongo"
+	"github.com/tonkeeper/tongo/boc"
+	"github.com/tonkeeper/tongo/tlb"
+)
+
+func (w *Wallet) CreateMessage(lifetime time.Duration, messages ...Sendable) (*tlb.Message, error) {
+	var msgArray []RawMessage
+	for _, m := range messages {
+		intMsg, mode, err := m.ToInternal()
+		if err != nil {
+			return nil, err
+		}
+		cell := boc.NewCell()
+		err = tlb.Marshal(cell, intMsg)
+		if err != nil {
+			return nil, err
+		}
+		msgArray = append(msgArray, RawMessage{Message: cell, Mode: mode})
+	}
+	err := checkMessagesLimit(len(msgArray), w.ver)
+	if err != nil {
+		return nil, err
+	}
+	bodyCell := boc.NewCell()
+	switch w.ver {
+	case HighLoadV2R2:
+		boundedID := uint64(time.Now().Add(lifetime).UTC().Unix()<<32) + uint64(rand.Uint32())
+		body := HighloadV2Message{
+			SubWalletId:    uint32(w.subWalletId),
+			BoundedQueryID: boundedID,
+			RawMessages:    PayloadHighload(msgArray),
+		}
+		err = tlb.Marshal(bodyCell, body)
+	default:
+		return nil, fmt.Errorf("message body generation for this wallet is not supported: %v", err)
+	}
+	if err != nil {
+		return nil, fmt.Errorf("can not marshal wallet message body: %v", err)
+	}
+
+	signBytes, err := bodyCell.Sign(w.key)
+	if err != nil {
+		return nil, fmt.Errorf("can not sign wallet message body: %v", err)
+	}
+	bits512 := tlb.Bits512{}
+	copy(bits512[:], signBytes[:])
+	signedBody := SignedMsgBody{
+		Sign:    bits512,
+		Message: tlb.Any(*bodyCell),
+	}
+	signedBodyCell := boc.NewCell()
+	if err = tlb.Marshal(signedBodyCell, signedBody); err != nil {
+		return nil, fmt.Errorf("can not marshal signed body: %v", err)
+	}
+	extMsg, err := tongo.CreateExternalMessage(w.address, signedBodyCell, nil, 0)
+	if err != nil {
+		return nil, fmt.Errorf("can not create external message: %v", err)
+	}
+	return &extMsg, nil
+}