Snippet of the javascript representation of how files should be signed and uploaded to Shadow Drive

shdw-drive-upload.js

import bs58 from 'bs58'
import nacl from 'tweetnacl'
import crypto from 'crypto'

// `files` is an array of each file passed in.
const allFileNames = files.map(file => file.fileName)
const hashSum = crypto.createHash("sha256")
// `allFileNames.toString()` creates a comma-separated list of all the file names.
const hashedFileNames = hashSum.update(allFileNames.toString())
const fileNamesHashed = hashSum.digest("hex")
// `storageAccount` is the string representation of a storage account pubkey
let msg = `Shadow Drive Signed Message:\nStorage Account: ${storageAccount}\nUpload files with hash: ${fileNamesHashed}`;
const fd = new FormData();
// `files` is an array of each file passed in
for (let j = 0; j < files.length; j++) {
    fd.append("file", files[j].data, {
        contentType: files[j].contentType as string,
        filename: files[j].fileName,
    });
}
// Expect the final message string to look something like this if you were to output it
// Shadow Drive Signed Message:
// Storage Acount: ABC123
// Upload files with hash: hash1

// If the message is not formatted like above exactly, it will fail message signature verification
// on the Shadow Drive Network side.
const encodedMessage = new TextEncoder().encode(message);
// Uses https://github.com/dchest/tweetnacl-js to sign the message. If it's not signed in the same manor,
// the message will fail signature verification on the Shadow Network side.
// This will return a base58 byte array of the signature.
const signedMessage = nacl.sign.detached(encodedMessage, keypair.secretKey);
// Convert the byte array to a bs58-encoded string
const signature = bs58.encode(signedMessage)
fd.append("message", signature);
fd.append("signer", keypair.publicKey.toString());
fd.append("storage_account", storageAccount.toString());
fd.append("fileNames", allFileNames.toString());
const request = await fetch(`${SHDW_DRIVE_ENDPOINT}/upload`, {
    method: "POST",
    body: fd,
});