Function GetContractAllowance

http/base/common/common.go:343–375

(cVersion byte, contractAddr, fromAddr, toAddr common.Address)

}

func GetContractAllowance(cVersion byte, contractAddr, fromAddr, toAddr common.Address) (uint64, error) {
	type allowanceStruct struct {
		From common.Address
		To   common.Address
	}
	mutable, err := NewNativeInvokeTransaction(0, 0, contractAddr, cVersion, "allowance",
		[]interface{}{&allowanceStruct{
			From: fromAddr,
			To:   toAddr,
		}})
	if err != nil {
		return 0, fmt.Errorf("NewNativeInvokeTransaction error:%s", err)
	}

	tx, err := mutable.IntoImmutable()
	if err != nil {
		return 0, err
	}

	result, err := bactor.PreExecuteContract(tx)
	if err != nil {
		return 0, fmt.Errorf("PrepareInvokeContract error:%s", err)
	}
	if result.State == 0 {
		return 0, fmt.Errorf("prepare invoke failed")
	}
	data, err := hex.DecodeString(result.Result.(string))
	if err != nil {
		return 0, fmt.Errorf("hex.DecodeString error:%s", err)
	}
	allowance := common.BigIntFromNeoBytes(data)
	return allowance.Uint64(), nil
}

func GetGasPrice() (map[string]interface{}, error) {
	start := bactor.GetCurrentBlockHeight()