使用 ethers.js 多邊形監聽智能合約的所有事件

我想知道的是，是否有一種方法可以持續監聽單個合約並實時獲取所有發出的事件。我現在能找到的是在特定契約中一次只監聽一個事件的方法。更準確地說：我在多邊形測試網（孟買）中部署了一個智能合約，這是一個可升級的合約，它連接到其他合約，並且像往常一樣發出我想要擷取的事件。我使用 Alchemy 作為提供者。我不清楚的另一個事實是，為什麼在 polyscan 中事件中的方法被列為類似0x40c10f19而不是名稱。

在向你們詢問如何執行此操作之前，我也嘗試使用此程式碼：`

filter = {
   address: CONTRACT_ADDRESS,
   topics:[
       utils.id("MarketItemCreated(address,uint256,address,uint256,uint256)"),
       utils.id("Transfer(address,address,address,uint256,uint256)")
   ]
}

provider.on(filter,(log,event)=>{
   console.log(log)
   console.log(event)
})

But when I actually interact with the contract I can't capture the events (the console.log does not display anything) but I can see the event in polyscan. I also try with by filtering only with the address without specifying the topic and I also try withproverer.once` 但沒辦法。

我究竟做錯了什麼？或者，我錯過了什麼？每一個提示或貢獻都值得讚賞:)

`Hi developer advocate at Chainstack here!

Web3.js has a subscriprion method to easily to that!

const Web3 = require("web3");

const node_url = "CHAINSTACK_WSS_URL";
const web3 = new Web3(node_url)

var logs = web3.eth.subscribe("logs", {
       address: "CONTRACT_ADDRESS",
       topics: []
   }, function(error, result) {
       if (!error)
           console.log(result);
   })
   .on("connected", function(subscriptionId) {
       console.log(subscriptionId);
   })
   .on("data", function(log) {
       console.log(log);
   })
   .on("changed", function(log) {});

Remember that you need a web-socket endpoint to use subscriptions in web3.js.

You can find more examples in the Chainstack docs API reference, and in the web3.js docs.

I hope this helps you!`

引用自：https://ethereum.stackexchange.com/questions/135301