Users can use the Zap section on yearn.finance to swap various assets bi-directionally into pooled interest-bearing tokens. The purpose of Zap is to faciliate a more seamless and frictionless swaps between various coins.
The following assets can be zapped into curve.fi pools: DAI, USDC, USDT, TUSD, BUSD. Users can zap out of curve.finance tokens to receive stablecoins in return. Zap also enables bi-directional swaps between ETH and DAI.