Function: stake(uint256 amount)

This function emits the Stake event and transfers the paymentToken to the bfx.

Inputs

• amount

  • Control: Completely controlled by the caller.

  • Constraints: The value must not be smaller than MIN_STAKE, and the caller must have enough paymentToken to transfer.

  • Impact: The amount to transfer.

Branches and code coverage

Intended branches

• Transfer the paymentToken from msg.sender to this contract.

  Test coverage

• Increase nextStakeId when the transfer succeeds.

  Test coverage

Negative behavior

• Revert when the amount is smaller than MIN_STAKE.

  Negative test

• Revert when the transfer fails.

  Negative test