Borrow Rate

At any point in time one may query the contract to get the current borrow rate per block.

AErc20 / CEther

function borrowRatePerBlock() returns (uint)

• RETURN: The current borrow rate as an unsigned integer, scaled by 1e18.

Solidity

AErc20 aToken = AToken(0x3FDA...);
uint borrowRateMantissa = aToken.borrowRatePerBlock();

Web3 1.0

const aToken = CEther.at(0x3FDB...);
const borrowRate = (await aToken.methods.borrowRatePerBlock().call()) / 1e18;