Create, trade, and settle prediction markets on Base with any ERC20 collateral. Use when building prediction market infrastructure, running contests, crowdsourcing probability estimates, adding utilit
Real data. Real impact.
Growing
Developers
Per week
Open source
Skills give you superpowers. Install in 30 seconds.
Create and manage prediction markets on Base Mainnet with any ERC20 collateral token.
Need prediction markets? ├─ Create market → npx ts-node scripts/create-market.ts --help ├─ Trade (buy/sell) → npx ts-node scripts/trade.ts --help ├─ Settle market → npx ts-node scripts/settle.ts --help └─ Redeem winnings → npx ts-node scripts/redeem.ts --help
export PRIVATE_KEY=<wallet_private_key> # Required export RPC_URL=<base_rpc_endpoint> # Optional (defaults to public RPC)
For production, use a dedicated RPC (Alchemy, QuickNode) to avoid rate limits.
Run any script with
--helpnpx ts-node scripts/create-market.ts \ --question "Will ETH reach $10k by Dec 2025?" \ --duration 168 \ --liquidity 100
Options:
--collateral <USDC|WETH|address>--decimals <n># Buy YES tokens npx ts-node scripts/trade.ts --buy --condition 0x... --outcome YES --amount 10Sell NO tokens
npx ts-node scripts/trade.ts --sell --condition 0x... --outcome NO --amount 5 --decimals 18
View prices only
npx ts-node scripts/trade.ts --info --condition 0x...
# Settle as YES winner npx ts-node scripts/settle.ts --condition 0x... --outcome YESCheck status
npx ts-node scripts/settle.ts --status --condition 0x...
npx ts-node scripts/redeem.ts --condition 0x...
import { PNPClient } from "pnp-evm"; import { ethers } from "ethers";const client = new PNPClient({ rpcUrl: process.env.RPC_URL || "https://mainnet.base.org", privateKey: process.env.PRIVATE_KEY!, });
// Create market const { conditionId } = await client.market.createMarket({ question: "Will X happen?", endTime: Math.floor(Date.now() / 1000) + 86400 * 7, initialLiquidity: ethers.parseUnits("100", 6).toString(), });
// Trade await client.trading.buy(conditionId, ethers.parseUnits("10", 6), "YES");
// Settle (after endTime) const tokenId = await client.trading.getTokenId(conditionId, "YES"); await client.market.settleMarket(conditionId, tokenId);
// Redeem await client.redemption.redeem(conditionId);
Use any ERC20. Common Base Mainnet tokens:
| Token | Address | Decimals |
|---|---|---|
| USDC | | 6 |
| WETH | | 18 |
| cbETH | | 18 |
Custom tokens add utility—holders can participate in your markets.
Before interacting with PNP contracts, you must approve them to spend your collateral tokens. This is standard for all EVM dApps.
type(uint256).maxThe approval transaction must be confirmed on-chain before the main transaction executes. If you see:
ERC20: transfer amount exceeds allowance
This means the approval hasn't been mined yet. Simply wait a few seconds and retry—the approval will be confirmed and subsequent attempts will succeed.
For maximum security-conscious users, you can manually set specific approval amounts, but this requires an approval transaction before each interaction.
| Contract | Address |
|---|---|
| PNP Factory | |
| Fee Manager | |
The pAMM virtual liquidity model ensures smooth trading even with minimal initial liquidity.
The approval transaction hasn't been confirmed yet. Wait 5-10 seconds and retry.
The market creation transaction may have failed or is still pending. Verify on BaseScan that your transaction was confirmed successfully.
The public Base RPC has rate limits. Use a dedicated RPC provider:
export RPC_URL=https://base-mainnet.g.alchemy.com/v2/YOUR_KEY
Base Mainnet can occasionally have congestion. Check gas prices and consider increasing if needed.
No automatic installation available. Please visit the source repository for installation instructions.
View Installation Instructions
1,500+ AI skills, agents & workflows. Install in 30 seconds. Part of the Torly.ai family.
© 2026 Torly.ai. All rights reserved.