Oracle Announcement & Attestation

exfacto_root = Path.join(__DIR__, "..")

Mix.install(
  [
    {:exfacto, path: exfacto_root, env: :dev}
  ],
  config_path: Path.join(exfacto_root, "config/config.exs"),
  lockfile: Path.join(exfacto_root, "mix.lock")
)

Imports

alias ExFacto.{Oracle, Event, Utils}
alias ExFacto.Oracle.{Announcement, Attestation}
alias Bitcoinex.Secp256k1.{PrivateKey, Point, Signature, Schnorr}

Setup Oracle

sk = %Bitcoinex.Secp256k1.PrivateKey{
  d:
    105_109_275_908_588_358_407_071_314_860_023_590_008_777_255_229_794_870_002_062_334_099_626_406_356_196
}

oracle = Oracle.new(sk)

Create Event

outcomes = ["YES", "NO"]
event_descriptor = %{outcomes: outcomes}
maturity_timestamp = 1_682_800_473

{nonce_sk, event} =
  Event.new_event_from_enum_event_descriptor(
    event_descriptor,
    maturity_timestamp,
    &ExFacto.Utils.new_private_key/0
  )

Oracle Signs Event

oracle_info = Oracle.sign_event(oracle, event)

Verify the Announcement

Announcement.verify(oracle_info.announcement)

Announcement.to_hex(oracle_info.announcement)

Oracle Signs Attestation

attest to the first outcome

attestation = Oracle.attest(oracle, oracle_info.announcement, 0)

Attestation.serialize(attestation) |> Base.encode16(case: :lower)