accounts/abi/bind, eth: rely on getCode for sanity checks, not estimate and call

1 files changed, 10 insertions, 0 deletions

diff --git a/accounts/abi/bind/backends/simulated.go b/accounts/abi/bind/backends/simulated.go
index 4866c4f58..54b1ce603 100644
--- a/accounts/abi/bind/backends/simulated.go
+++ b/accounts/abi/bind/backends/simulated.go
@@ -78,6 +78,16 @@ func (b *SimulatedBackend) Rollback() {
 	b.pendingState, _ = state.New(b.pendingBlock.Root(), b.database)
 }
 
+// HasCode implements ContractVerifier.HasCode, checking whether there is any
+// code associated with a certain account in the blockchain.
+func (b *SimulatedBackend) HasCode(contract common.Address, pending bool) (bool, error) {
+	if pending {
+		return len(b.pendingState.GetCode(contract)) > 0, nil
+	}
+	statedb, _ := b.blockchain.State()
+	return len(statedb.GetCode(contract)) > 0, nil
+}
+
 // ContractCall implements ContractCaller.ContractCall, executing the specified
 // contract with the given input data.
 func (b *SimulatedBackend) ContractCall(contract common.Address, data []byte, pending bool) ([]byte, error) {