Redeem Underlying

The redeem underlying function converts fTokens into a specified quantity of the underlying asset, and returns them to the user. The amount of fTokens redeemed is equal to the quantity of underlying tokens received, divided by the current Exchange Rate. The amount redeemed must be less than the user's Account Liquidity and the market's available liquidity.

FBep20 / FBnb

function redeemUnderlying(uint redeemAmount) returns (uint)
  • msg.sender: The account to which redeemed funds shall be transferred.
  • redeemAmount: The amount of underlying to be redeemed.
  • RETURN: 0 on success, otherwise an Error Code


FBnb fToken = FBnb(0x3FDB...);
require(fToken.redeemUnderlying(50) == 0, "something went wrong");

Web3 1.0

const fToken =;
fToken.methods.redeemUnderlying(10).send({from: ...});
Last modified 2yr ago