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andresdefi
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marginfi

Implement lending, borrowing, flash loans, and leveraged positions on Marginfi via its TypeScript SDK.

6|20|Updated Mar 14, 2026
Search Tags:#typescript#borrowing#defi#solana#lending#flash loans#marginfi
One-click install
npx skills add https://github.com/andresdefi/cryptoskills --skill marginfi-andresdefi
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: marginfi
Source: https://github.com/andresdefi/cryptoskills/tree/main/skills/marginfi
Command: npx skills add https://github.com/andresdefi/cryptoskills --skill marginfi-andresdefi

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires @mrgnlabs/marginfi-client-v2, @mrgnlabs/mrgn-common, @solana/web3.js, @coral-xyz/anchor, decimal.js.

What problem does it solve? AI agents and developers often lack accurate, up-to-date knowledge of the Marginfi protocol on Solana, leading to hallucinated program addresses, outdated SDK patterns, and incorrect health or interest calculations when building lending and borrowing applications. ## Core Features & Use Cases - Lending & Borrowing Operations: Create Marginfi accounts, deposit collateral, borrow assets, repay debt, and withdraw funds using the @mrgnlabs/marginfi-client-v2 SDK. - Advanced DeFi Primitives: Execute flash loans, leveraged looping positions, and repay-with-collateral swaps in single atomic transactions. - Risk & Account Monitoring: Compute health components, free collateral, interest rates, utilization, and portfolio values with correct oracle price handling. - Use Case: Build a bot that deposits SOL as collateral, borrows USDC against it with a safety buffer, monitors maintenance health, and repays the full debt including accrued interest. ## Quick Start Ask the agent to create a Marginfi account and deposit 1 SOL as collateral using the marginfi-client-v2 SDK on Solana mainnet.

Frequently Asked Questions about marginfi

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I deposit and borrow on Marginfi with TypeScript?▼

Initialize MarginfiClient with getConfig("production"), create or fetch a MarginfiAccountWrapper, then call account.deposit(amount, bankAddress) and account.borrow(amount, bankAddress) with UI-denominated amounts. Banks are looked up via client.getBankByTokenSymbol("SOL").

How do flash loans work on Marginfi?▼

Marginfi flash loans let you borrow without collateral provided you repay within the same transaction. Call account.flashLoan({ ixs }) with your custom instructions, such as arbitrage or liquidation logic, between the borrow and repay.

What is the Marginfi production program address on Solana?▼

The production program is MFv2hWf31Z9kbCa1snEPYctwafyhdvnV7FZnsebVacA with group 4qp6Fx6tnZkY5Wropq9wUYgtFxXKwE6viZxFHg3rdAG8. Use getConfig("production") from the SDK instead of hardcoding addresses.

Why does my Marginfi borrow transaction fail with insufficient health?▼

Borrows fail when weighted liabilities exceed weighted collateral under initial margin requirements. Check account.computeHealthComponents(MarginRequirementType.Initial) and computeFreeCollateral(), then deposit more collateral or reduce the borrow amount.

How do I repay Marginfi debt including accrued interest?▼

Call account.repay(0, bankAddress, true) with the repayAll flag set to true. This automatically covers accrued interest and closes the liability position, avoiding dust left by partial fixed-amount repayments.

Why do Marginfi oracle prices differ from market prices?▼

Marginfi applies confidence interval adjustments to oracle prices: collateral is valued at price minus confidence, liabilities at price plus confidence. Stale or uncranked oracle feeds can also cause transaction failures.

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