Borrow Rate

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

BErc20 / CEther

function borrowRatePerBlock() returns (uint)

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

Solidity

BErc20 bToken = BToken(0x3FDA...);
uint borrowRateMantissa = bToken.borrowRatePerBlock();

Web3 1.0

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