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IERC3156

Flash loan standard interface

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ERC-3156flash-loansDeFilendingarbitrage

What is IERC3156?

IERC3156 defines the standard interface for flash loans on Ethereum. It specifies how lenders provide uncollateralized loans that must be repaid within the same transaction, enabling arbitrage, liquidations, and collateral swaps without upfront capital.

Supported chains
EthereumPolygonArbitrumOptimismBaseBNB ChainAvalanche

Key Features

flashLoan() for single-transaction borrowing
flashFee() for fee calculation
maxFlashLoan() for availability checking
Borrower callback for custom logic

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Reference guide to the most important Solidity interfaces from OpenZeppelin Contracts. ERC-20, ERC-721, ERC-1155, vaults, royalties, and more.

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