check utf8 string in GetFeeQuoterTokenUpdates

Author: ogtownsend

pkg/ccip/chainaccessor/ton_accessor.go

@@ -9,6 +9,7 @@ import (
 	"math/big"
 	"sync"
 	"time"
+	"unicode/utf8"
 
 	"github.com/xssnick/tonutils-go/address"
 	"github.com/xssnick/tonutils-go/tlb"
@@ -263,7 +264,7 @@ func (a *TONAccessor) LatestMessageTo(ctx context.Context, dest ccipocr3.ChainSe
 		SkipBytes(40). // Skip to DestChainSelector
 		FilterBytes(8, query.EQ(binary.BigEndian.AppendUint64(nil, uint64(dest)))).
 		OrderBy(query.SortByTxLT, query.DESC). // sort by transaction LT new to old
-		Limit(1).                              // only get the last one
+		Limit(1). // only get the last one
 		Execute(ctx, a.logPoller.GetStore())
 
 	if err != nil {
@@ -774,6 +775,9 @@ func (a *TONAccessor) GetFeeQuoterTokenUpdates(
 		default:
 			return nil, fmt.Errorf("expected either cell or nil, received %T", priceResult)
 		}
+		if !utf8.ValidString(token.String()) {
+			return nil, fmt.Errorf("gRPC can't handle non-UTF8 strings: %x", token)
+		}
 		prices[ccipocr3.UnknownEncodedAddress(token)] = price
 	}
 	return prices, nil