myriad-on-abstract

Myriad on Abstract

Myriad Protocol is a prediction market platform live on Abstract (and Linea, BNB Chain). Integrate it to show market data, let users trade outcome shares, and earn revenue from buy volume.

Architecture

Layer	Tool	Use For
Read-only data	REST API V2	Market listings, prices, charts, portfolio, events
Trading	polkamarkets-js SDK	Buy/sell shares, claim winnings, ERC-20 approvals
Revenue	referralBuy + builder code	Earn distributor fee (typically 1%) on buy volume

Quick Start

API Setup

Base URL: https://api-v2.myriadprotocol.com/
Auth: x-api-key: <your_api_key>  (or ?api_key=<your_api_key>)
Rate limit: 50 req/s per IP/key

Contact the Myriad team to obtain an API key.

Common Flow: Fetch Markets → Get Quote → Execute Trade

// 1. Fetch open markets on Abstract
const res = await fetch(
  "https://api-v2.myriadprotocol.com/markets?network_id=2741&state=open&sort=volume_24h&limit=10",
  { headers: { "x-api-key": "<your_api_key>" } }
);
const { data: markets } = await res.json();

// 2. Get a buy quote for a specific outcome
const quote = await fetch("https://api-v2.myriadprotocol.com/markets/quote", {
  method: "POST",
  headers: { "Content-Type": "application/json", "x-api-key": "<your_api_key>" },
  body: JSON.stringify({
    market_id: 164,
    outcome_id: 0,
    network_id: 2741,
    action: "buy",
    value: 100,
    slippage: 0.01,
  }),
});
// Returns: shares, price_before, price_after, calldata, fees

// 3. Execute via SDK (see references/sdk.md) or send calldata directly

Common Flow: Claim Winnings

const claim = await fetch("https://api-v2.myriadprotocol.com/markets/claim", {
  method: "POST",
  headers: { "Content-Type": "application/json", "x-api-key": "<your_api_key>" },
  body: JSON.stringify({ market_id: 164, network_id: 2741 }),
});
// Returns: action ("claim_winnings" | "claim_voided"), outcome_id, calldata

Decision: API vs SDK

Task	Use
Display market listings, prices, charts	API — GET /markets
Show user portfolio / positions	API — GET /users/:address/portfolio
Get trade quotes + calldata	API — POST /markets/quote
Execute trades from a backend/agent	SDK — pm.buy() / pm.sell()
Execute trades from a dapp with wallet	API calldata + wallet sendTransaction
Earn revenue on buy volume	SDK — pm.referralBuy() with builder code
Claim winnings after resolution	SDK — pm.claimWinnings() or API calldata

Abstract Contract Addresses

Contract	Mainnet	Testnet
PredictionMarket	0x3e0F5F8F5Fb043aBFA475C0308417Bf72c463289	0x6c44Abf72085E5e71EeB7C951E3079073B1E7312
PredictionMarketQuerier	0x1d5773Cd0dC74744C1F7a19afEeECfFE64f233Ff	0xa30c60107f9011dd49fc9e04ebe15963064eecc1

Token	Mainnet	Testnet
USDC.e	0x84A71ccD554Cc1b02749b35d22F684CC8ec987e1	0x8820c84FD53663C2e2EA26e7a4c2b79dCc479765
PENGU	0x9eBe3A824Ca958e4b3Da772D2065518F009CBa62	0x6ccDDCf494182a3A237ac3f33A303a57961FaF55
PTS	0x0b07cf011b6e2b7e0803b892d97f751659940f23	0x6cC39C1149aed1fdbf6b11Fd60C18b96446cBc96

Revenue Sharing

Builders earn the distributor_fee (typically 1%) on eligible buy trades by using referralBuy with a whitelisted builder code. Must apply for whitelisting with the Myriad team.

See references/revenue-sharing.md for full integration details.

Gotchas

• ERC-20 approval required before trading — call erc20.approve() for the PredictionMarket contract before any buy/sell
• Buy quotes take value only — the amount of the collateral token to spend (not shares)
• Sell quotes accept value or shares — provide exactly one, not both
• referralBuy works on any market — calling it without a whitelisted code is safe, it just won't earn revenue
• network_id is required on most API calls — use 2741 for Abstract mainnet, 11124 for testnet
• Token decimals vary — USDC.e on Abstract uses 6 decimals; always check decimals() before formatting amounts

Feature Reference

Topic	Where to look
Full REST API reference	references/api-v2.md
polkamarkets-js SDK	references/sdk.md
Revenue sharing integration	references/revenue-sharing.md
All contract addresses (multi-chain)	references/contracts.md