JS App to Open & Exit Pendle PT Positions via Contango

Project: JS App to Open & Exit Pendle PT Positions via Contango

Goal:
Build a small JavaScript/TypeScript app that lets me:
• Open leveraged Pendle PT positions on Contango by calling the smart contracts directly (no UI fee).
• Exit/close positions by fully unrolling leverage, selling PT back to USDC, and repaying debt.
• Needs to support ETH mainnet


Requirements:
• Use Node.js + TypeScript, with Viem or Ethers for blockchain interaction.
• Load Contango contract addresses & ABIs (from repo/docs).
• Support marketId resolution for Pendle PT maturities.
• Functions:
• Open position: approve USDC, call openPosition with margin, leverage, slippage, etc.
• Exit position: close partially or fully by unwinding PT → USDC, repaying debt, and sending proceeds back to wallet.
• List positions: detect CTGP NFTs in wallet, show instrument, collateral, debt.
• Provide both a CLI tool and a minimal web UI for these actions.
• Configurable via .env (RPC URL, private key, etc).

Deliverables:
• Source code repo with CLI + minimal web UI.
• Clear README with setup, usage, and how to add new PT maturities.
• Basic test to confirm open + close cycle works on mainnet fork.

If you’re applying, please:
• Confirm prior DeFi contract-interaction work (ideally with routers/flash-loan style flows).
• Provide a small code sample (TypeScript + Viem) that reads a view function on mainnet.


Contagno app - https://app.contango.xyz/
Contagno smart contract code - https://github.com/contango-xyz/core-v2
Contagno network addresses - https://github.com/contango-xyz/core-v2/blob/main/networks.json