Mint

The mint function transfers an asset into the protocol, which begins accumulating interest based on the current Supply Rate for the asset. The user receives a quantity of bTokens equal to the underlying tokens supplied, divided by the current Exchange Rate.

BErc20

function mint(uint mintAmount) returns (uint)

• msg.sender: The account which shall supply the asset, and own the minted bTokens.

• mintAmount: The amount of the asset to be supplied, in units of the underlying asset.

• RETURN: 0 on success, otherwise an Error code

Before supplying an asset, users must first approve the bToken to access their token balance.

CEther

function mint() payable

• msg.value [payable]: The amount of ether to be supplied, in wei.

• msg.sender: The account which shall supply the ether, and own the minted bTokens.

• RETURN: No return, reverts on error.

Solidity

Erc20 underlying = Erc20(0xToken...);     // get a handle for the underlying asset contract
BErc20 bToken = BErc20(0x3FDA...);        // get a handle for the corresponding bToken contract
underlying.approve(address(bToken), 100); // approve the transfer
assert(bToken.mint(100) == 0);            // mint the bTokens and assert there is no error

Web3 1.0

const bToken = CEther.at(0x3FDB...);
await bToken.methods.mint().send({from: myAccount, value: 50});