Oracle

event OutcomeProposed(uint64 seq, bytes32 indexed conditionId, bytes32 questionId, address indexed proposer, uint256[] payouts, uint64 challengeDeadline);
event OutcomeChallenged(uint64 seq, bytes32 indexed conditionId, bytes32 questionId, address challenger, uint256 bondAmount);
event OutcomeFinalized(uint64 seq, bytes32 indexed conditionId, bytes32 questionId, address finalizer, uint256[] payouts);
event ChallengeConfirmed(uint64 seq, bytes32 indexed conditionId, bytes32 questionId, address challenger, uint256[] payouts);
event ChallengeUpheld(uint64 seq, bytes32 indexed conditionId, bytes32 questionId, address challenger, uint256[] newPayouts, uint256 reward);
event MarketVoided(uint64 seq, bytes32 indexed conditionId, bytes32 questionId, address challenger);
event MarketVoidedWithPayouts(uint64 seq, bytes32 indexed conditionId, bytes32 questionId, address challenger, uint256[] payouts, bytes32 reasonHash);
event VoidedWithoutChallenge(uint64 seq, bytes32 indexed conditionId, bytes32 questionId);
event MarketDelayed(uint64 seq, bytes32 indexed conditionId);
event MarketUndelayed(uint64 seq, bytes32 indexed conditionId);
event ProposalClearInitiated(uint64 seq, bytes32 indexed conditionId, uint256 executableAfter);
event ProposalClearExecuted(uint64 seq, bytes32 indexed conditionId);
event BondPayoutQueued(uint64 seq, address indexed recipient, uint256 amount);
event BondPayoutWithdrawn(uint64 seq, address indexed recipient, address indexed to, uint256 amount);
event BondAmountSet(uint64 seq, uint256 bondAmount);
event ChallengeWindowSet(uint64 seq, uint256 challengeWindow);

import { Contract } from 'ethers';

// ORACLE_ADDRESS / USDC_ADDRESS: `oracle` / `usdc` from GET /api/platform/contracts
const oracle = new Contract(ORACLE_ADDRESS, [
  'function getProposal(bytes32 conditionId) view returns (tuple(address proposer, bool challenged, bool finalized, uint64 proposedAt, uint64 challengeDeadline, uint256 bondSnapshot, uint256 rewardSnapshot, bytes32 questionId, uint256[] payouts))',
  'function challengeOutcome(bytes32 conditionId)',
], signer);
const usdc = new Contract(USDC_ADDRESS, [
  'function approve(address spender, uint256 amount) returns (bool)',
], signer);

// conditionId: the market's `conditionId` from GET /api/markets
const proposal = await oracle.getProposal(conditionId);
await (await usdc.approve(ORACLE_ADDRESS, proposal.bondSnapshot)).wait();
await (await oracle.challengeOutcome(conditionId)).wait();