# Verify The library can be downloaded here: {{ link }} Full working example can be downloaded here: {{ link }} {% hint style="info" %} This template require http protocol to work properly or you may get a CORS Policy error.\ To test locally, a server (wamp, node server etc) is required to access the index.html through http(s):// and not file:///C:/... {% endhint %} **First, you need to create an html page and include the library call:** ``` ``` **To init the library you need to do the following at the start of your javascript code:** ``` let network = "T" // W for mainnet, T for testnet let Signchain = new window.signchain(network) ``` **HTML EXAMPLE** ``` Verification
School address:
3MvujUZTtoANRzrKYKzx99Vtb9TUh6VPCDm

Verify

``` **JAVASCRIPT EXAMPLE** ``` let network = "T" // W for mainnet, T for testnet let explorerHost = network == "T" ? "https://testnet.wavesexplorer.com" : "https://wavesexplorer.com" let verifyAddress = "3MvujUZTtoANRzrKYKzx99Vtb9TUh6VPCDm" let Signchain = new window.signchain(network) let storeDataVerify = null // ADD THE LISTENER TO YOUR VERIFY INPUT FIELD document.getElementById("selectFileVerify").addEventListener("change", async function (event) { if(event.target.files[0]){ let file = event.target.files[0] await Signchain.hash(file, function (res) { storeDataVerify = res; document.getElementById("fileInfosVerify").innerHTML = "Sha256 file hash: " + storeDataVerify.hash }); }else{ document.getElementById("fileInfosVerify").innerHTML = "" storeDataVerify = null; } }); // ADD VERIFICATION CLICK EVENT ON VERIFY BUTTON document.getElementById("verify").addEventListener("click", async function (e) { let template document.getElementById("resultVerify").innerHTML = "" let checkData = await Signchain.verify(storeDataVerify.hash, verifyAddress) if(checkData.valid){ let certificationDate = JSON.parse(checkData.data[0].value).timestamp template = `
Certification valid and certified on ${new Date(certificationDate)} See on the Blockchain
` }else{ template = `Certification not found` } document.getElementById("resultVerify").innerHTML = template; }) ``` **There is 4 important elements in the HTML example:** ```
``` If you change the identifiants (css ids) of these elements, you will have to also change it in the javascript example. **EDIT THE RESULT** To edit the result, simply change the html of the variable "template" in the javascript example: ``` template = `
Certification valid and certified on ${new Date(certificationDate)} See on the Blockchain
` ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.sign-web.app/developers/3rd-party-integration/verify.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.