GitHub Attestations

A github attestation is simply the gist ID. An example of a valid gist should contain the following properties. It should first and foremost be public and have the stated description. It should then contain a proof with an encrypted blob of content defined below this current snippet.

{
  public: true,
  description: 'Edgeware Identity Attestation',
  files: {
    proof: {
      content: encryptedContent,
    }
  },
  ...
}

The decrypted content should must contain the following data to be valid: the identityType (github), the github identity reported on-chain which must match that of the creator of the gist, the Edgeware base 58 encoded public address, and the Blake2 hash of the concatenated identity type and identity.

{
  identityHash: "0x995e957d368c817e5d64eab9757991a10001d8c6f3733646824da2c006ecc64e",
  identityType: "github",
  identity: "drewstone",
  sender: "5ERmnP13Gx8ybq64pi2LEGWVqF2AoRCM83UovE9537uRvLA8",
}

The has can be computed using the following snippet:

import { u8aConcat } from '@polkadot/util';
import { blake2AsHex } from '@polkadot/util-crypto';

let identityHash = blake2AsHex(
  u8aConcat(
    new Text(data.identityType).toU8a(),
    new Text(data.identity).toU8a()
  )
)