👀 Views: 18 💬 Answers: 1 📅 Created: 2025-09-17

HTML smart-contracts web3 JavaScript

I'm stuck trying to After trying multiple solutions online, I still can't figure this out. I'm sure I'm missing something obvious here, but I'm a bit lost with Building a decentralized application where users submit data through an HTML form, I've run into a few challenges with how to structure the form data for smart contract integration... The smart contract expects specific fields in a JSON format upon submission, and I'm trying to ensure that the data sent to it is correctly formatted. The current form looks like this: ```html <form id="dataSubmission"> <label for="username">Username:</label> <input type="text" id="username" name="username" required> <label for="amount">Amount:</label> <input type="number" id="amount" name="amount" required> <button type="submit">Submit</button> </form> ``` In my JavaScript, I’m collecting form data and attempting to structure it before sending it on the blockchain: ```javascript const form = document.getElementById('dataSubmission'); form.addEventListener('submit', async (event) => { event.preventDefault(); const formData = new FormData(form); const data = { username: formData.get('username'), amount: formData.get('amount'), }; const response = await sendToBlockchain(data); console.log(response); }); ``` The challenge arises when I try to send the data to the smart contract function, which expects a certain structure. For instance, the contract requires the data to be serialized in a specific way. I've tried using JSON.stringify() before sending, but I still face issues with the data being recognized correctly on the blockchain. ```javascript async function sendToBlockchain(data) { try { const result = await contract.methods.submitData( JSON.stringify(data) ).send({ from: userAccount }); return result; } catch (error) { console.error('Error sending data to blockchain:', error); } } ``` What am I missing here? Could it be an issue with how the JSON is structured or perhaps I'm not handling the promise correctly? Any insights or best practices for ensuring smooth integration between HTML form submissions and smart contract calls would be greatly appreciated. For context: I'm using Javascript on Linux. What am I doing wrong? I'm using Javascript latest in this project. Any help would be greatly appreciated! Any ideas how to fix this? Cheers for any assistance! I recently upgraded to Javascript 3.11.