dapp/lp 代币合约流动性质押挖矿分红系统开发详细及案例（源码部署）

Smart contract is a kind of computer program or transaction protocol,which records the information,events and behaviors of transaction terms,aiming at reducing the demand,arbitration and execution costs for trusted intermediaries.On the Chang'an chain,users can write smart contracts in high-level languages(Golang,Rust,solidity,TinyGo,and C++).After compilation,they are stored in the blockchain in the form of binary files,WASM,and EVM bytecodes.Users can trigger the execution of codes in smart contracts by sending transactions.

args:Dictionary-来自事件的参数。

event:String-事件名称。

logIndex:Number-块中日志索引位置的整数。

transactionIndex:Number-创建的交易索引位置日志的整数。

transactionHash:String,32 Bytes-创建此日志的事务的哈希值。

address:String,32 Bytes-此日志的来源地址。

blockHash:String,32 Bytes-此日志所在块的哈希值。当它挂起时为 null。

blockNumber:Number-此日志所在的块号。当它挂起时为 null

如下，是一个简单的 demo，大家应根据自己的业务场景，具体的去解析链上结果:

def _filter_event_transfer(self,tx_receipt_event_log)->List[ORDER_TX_RES_DETAILS_LIKE]:

案例及需求开发 I35 逻辑 7O98 系统 O7I8

事件日志的解码和整理

:param tx_receipt_event_log:

:return:

"""

log_details:List[ORDER_TX_RES_DETAILS_LIKE]=[]开发流程：MrsFu123

if isinstance(tx_receipt_event_log,Tuple):

#assert len(tx_receipt_event_log)==2,"此函数解析交易，理应只得到 2 笔 Transfer 记录"

if len(tx_receipt_event_log)!=2:#交易失败的情况：()

self._logger.error("事件日志函数解析交易，理应只得到 2 笔 Transfer 记录")

for d in tx_receipt_event_log:

if d.get("event")=="Transfer":

coin_name:str=self.coin_name_to_addr_dict_reverse[d["address"]]

transfer_vol:str=str(self.from_wei(d"args",decimals=self.coin_decimals_dict[coin_name]))

from_addr:str=d"args"

to_addr:str=d"args"

if from_addr in self.account_addr_list:#如果是账号的地址

print(f"是账号的地址{from_addr}:{coin_name}减少{transfer_vol}")

order_res:ORDER_TX_RES_DETAILS_LIKE={"coin_name":coin_name,"side":"sell","vol":transfer_vol,"account_addr":from_addr}

log_details.append(order_res)

elif from_addr in self.pair_name_to_addr_dict.values():#如果是 pair 合约的地址

print(f"是 pair 合约的地址{from_addr}:{coin_name}减少{transfer_vol}")

else:

print(f"未知地址{from_addr}:{coin_name}减少{transfer_vol}")

if to_addr in self.account_addr_list:#如果是账号的地址

print(f"是账号的地址{to_addr}:{coin_name}增加{transfer_vol}")

order_res:ORDER_TX_RES_DETAILS_LIKE={"coin_name":coin_name,"side":"buy","vol":transfer_vol,"account_addr":to_addr}

log_details.append(order_res)

elif to_addr in self.pair_name_to_addr_dict.values():#如果是 pair 合约的地址

print(f"是 pair 合约的地址{to_addr}:{coin_name}增加{transfer_vol}")

else:

print(f"未知地址{to_addr}:{coin_name}增加{transfer_vol}")

return log_details