feat: update cairo version when build token transfer.

core/starknet/token.go

@@ -126,7 +126,7 @@ func (t *Token) BuildTransfer(sender, receiver, amount string) (txn base.Transac
  }
 
  cli := t.chain.rpc
- cli.CairoVersion = 2
+ cli.CairoVersion = cairoVersionOf(*senderFelt, cli)
  callData, err := cli.FmtCalldata([]rpc.FunctionCall{transferCall})
  if err != nil {
  return
@@ -161,3 +161,21 @@ func (t *Token) CanTransferAll() bool {
 func (t *Token) BuildTransferAll(sender, receiver string) (txn base.Transaction, err error) {
  return nil, base.ErrUnsupportedFunction
 }
+
+func cairoVersionOf(contractAddress felt.Felt, cli rpc.RpcProvider) int {
+ classInfo, err := cli.ClassAt(context.Background(), latestBlockId, &contractAddress)
+ if err != nil {
+ return 2 // default
+ }
+ switch info := classInfo.(type) {
+ case rpc.DeprecatedContractClass:
+ return 0
+ case rpc.ContractClass:
+ if info.ContractClassVersion == "0.0.0" {
+ return 0
+ }
+ return 2
+ default:
+ return 2
+ }
+}