accounts/abi/bind/backend: use requested header for gas prices and gas limits (#28280)

accounts/abi/bind/backends/simulated.go

@@ -606,8 +606,7 @@ func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallM
 	if call.GasPrice != nil && (call.GasFeeCap != nil || call.GasTipCap != nil) {
 		return nil, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
 	}
-	head := b.blockchain.CurrentHeader()
-	if !b.blockchain.Config().IsLondon(head.Number) {
+	if !b.blockchain.Config().IsLondon(header.Number) {
 		// If there's no basefee, then it must be a non-1559 execution
 		if call.GasPrice == nil {
 			call.GasPrice = new(big.Int)
@@ -629,13 +628,13 @@ func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallM
 			// Backfill the legacy gasPrice for EVM execution, unless we're all zeroes
 			call.GasPrice = new(big.Int)
 			if call.GasFeeCap.BitLen() > 0 || call.GasTipCap.BitLen() > 0 {
-				call.GasPrice = math.BigMin(new(big.Int).Add(call.GasTipCap, head.BaseFee), call.GasFeeCap)
+				call.GasPrice = math.BigMin(new(big.Int).Add(call.GasTipCap, header.BaseFee), call.GasFeeCap)
 			}
 		}
 	}
 	// Ensure message is initialized properly.
 	if call.Gas == 0 {
-		call.Gas = 50000000
+		call.Gas = 10 * header.GasLimit
 	}
 	if call.Value == nil {
 		call.Value = new(big.Int)