FraX Finance (FraX for short), formerly known as decentral bank, is a fractional algorithm stable currency protocol. FraX is an open source, unauthorized, and fully chained protocol. It is currently running on Ethereum (cross chained operation may be realized in the future). The ultimate goal of FraX protocol is to provide a highly scalable and decentralized algorithm currency to replace fixed supply digital assets such as BTC. FraX is a stable currency, with a target of about $1 / currency. FraX shares (FXS) is a governance token that accumulates fees, seizure income, and excess collateral value. FraX (FraX) is a partially algorithmic stable currency, whose supply is partly supported by collateral and partly algorithmic stable. The ratio of collateral depends on the market price of FraX stabilization currency. If the trading price of FraX is higher than US $1, the agreement will reduce the collateral ratio. If the trading price of FraX is less than US $1, the agreement will increase the collateral ratio. FraX share (FXS) is the unstable erc-20 governance token of FraX, and has the following use cases: Governance: granting the token holder governance rights to add / adjust the mortgage asset pool, setting the coinage / redemption fee, and changing the update rate of the mortgage rate. Mortgage: mortgage in various pools to earn rebate at the inclined annualized rate of return. Casting and Redemption: FXS will be destroyed when casting FraX, and FXS will be cast when redeeming FraX. Rewards: users who deposit uniswap LP tokens into an incentive pool can receive FXS rewards. In the initial stage, FraX is pledged at a proportion of 100%, which means that the forging of FraX only needs to put the collateral into the coin contract. In the partial mortgage stage, the foundry FraX needs to provide an appropriate proportion of collateral and destroy FXS.