Phantom Wallet Universal Links not working

[JackFrostDev]

Summary

Hi there, I'm trying to implement mobile connection logic to my browser-based dApp but I'm running into an issue and I cannot seem to resolve it in any way.

The https://phantom.app/ul/v1/connect endpoint works, where I end up with the wallet address of the connected wallet and a session ID.

The issue arises when I try to use the https://phantom.app/ul/v1/signMessage endpoint. For some reason, when my dApp opens the Universal Link URL instead of redirecting me to the Phantom Wallet app it just gives me a 404 error instead.

I'll share with you the snippet of code that I have been using:

const payload = {
    message: bs58.encode(Buffer.from(message)),
    session: sessionRef.current!
}

const [nonce, encryptedPayload] = encryptPayload(payload, sharedSecretRef.current!);

console.log("")
console.log("")
console.log("Signing message")
console.log("Message", message)
console.log("DappKeyPair", dappKeyPair.publicKey.toString())
console.log("Session", sessionRef.current)
console.log("Secret", sharedSecretRef.current)
console.log("Nonce:", bs58.encode(nonce))
console.log("Encrypted Payload:", bs58.encode(encryptedPayload))

// Handle the redirection to phantom
const params = new URLSearchParams({
    dapp_encryption_public_key: bs58.encode(dappKeyPair.publicKey),
    nonce: bs58.encode(nonce),
    redirect_link: `${window.location.origin}/onSignMessage`,
    payload: bs58.encode(encryptedPayload)
})

const url = `https://phantom.app/ul/v1/signMessage?${params.toString()}`
window.location.href = url

I've tried various different things to no avail, and I've tried comparing the code and it seemingly is doing exactly what the example code here is doing but the 404 error still persists.

Could you help point me in the right direction?

For reference, the browser-based dApp is a Next.js frontend application.

Example

No response

Steps to Reproduce

Please see the description for the code that I am using

Phantom Version

No response

Is there an existing discussion for this?

• I have searched the existing discussions