Audit function

The audit function is where the data is verified. The audit function is defined in the special_audit.js file. The file is located in the root folder. The audit function is exported from the file and imported into the `audit.js`` file.

During audit round, the task will verify other nodes submission value to make sure the data is correct. The audit function will be called by K2 to verify the data. If the data is correct, the task will return true to K2. Otherwise, it will return false.

In this function, we will use the proof_cid that we just uploaded in submit function and combine with node_pubKey and node_signature to verify the data.

Verify Node

After extracting the data from proof_cid, we will use node_pubKey and node_signature to verify the data. There's dataFromCid function in helpers folder that can help you extract the data from proof_cid.

const outputraw = await dataFromCid(submission);
if (!outputraw) {
  console.log("VOTE FALSE");
  console.log("SLASH VOTE DUE TO FAKE VALUE");
  return false;
}
const output = outputraw.data;

const voteResp = await namespaceWrapper.verifySignature(
  signature,
  nodePublicKey
);
const cleanVoteRespData = voteResp.data.replace(/"/g, "");
if (!voteResp || cleanVoteRespData !== steam_special) {
  console.log("VOTE FALSE");
  console.log("SLASH VOTE DUE TO DATA MISMATCH");
  return false;
}

Verify Data

After verifying the node, we will verify the data. In this task, we will use steam_special to verify the data. If the data format is JSON, it returns true. Otherwise, it will return false.

if (!typeof steam_special_resp.data === "json") {
  console.log("VOTE FALSE");
  console.log("SLASH VOTE DUE TO FAKE STEAM special");
  return false;
}

If any of the steps above return false, the task will return false to K2. Otherwise, it will return true.