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FXS 智能合约及地址

调整版 ERC-20 合约，代表 FXS 代币，用于与 FRAX 稳定币相关的质押和治理活动。

部署

状态变量

ERC-20 (Inherited)

https://docs.openzeppelin.com/contracts/2.x/api/token/erc20#ERC20

访问控制(Inherited)

https://docs.openzeppelin.com/contracts/3.x/api/access#AccessControl

FXS各项细分。

address public FRAXStablecoinAdd

FRAX 合约地址。

uint256 genesis_supply

FXS初始供应。

uint256 public maximum_supply

FXS最大供应。

uint256 public FXS_DAO_min

加入 DAO 组织所需的最低 FXS 量。

address public owner_address

合约Owner地址。

address public oracle_address

oracle合约地址。

address public timelock_address

时间锁地址。

FRAXStablecoin private FRAX

FRAX 合约实例。

struct Checkpoint {
    uint32 fromBlock;
    uint96 votes;
}

借鉴自Compound Finance。用于治理投票。

mapping (address => mapping (uint32 => Checkpoint)) public checkpoints

在特定区块下，给定地址的投票权列表。

mapping (address => uint32) public numCheckpoints

某个地址的Checkpoint计算。

受限制的函数

setOracle

setOracle(address new_oracle) external onlyByOracle

Change the address of the price oracle.

setFRAXAddress

setFRAXAddress(address frax_contract_address) external onlyByOracle

Set the address of the FRAX contract.

setFXSMinDAO

setFXSMinDAO(uint256 min_FXS) external onlyByOracle

Set minimum FXS required to join DAO groups.

mint

mint(address to, uint256 amount) public onlyPools

Mint new FXS tokens.

pool_mint

pool_mint(address m_address, uint256 m_amount) external onlyPools

This function is what other FRAX pools will call to mint new FXS (similar to the FRAX mint).

pool_burn_from

pool_burn_from(address b_address, uint256 b_amount) external onlyPools

This function is what other FRAX pools will call to burn FXS.

重写的公共函数

transfer

transfer(address recipient, uint256 amount) public virtual override returns (bool)

Transfer FXS tokens.

transferFrom

transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool)

Transfer FXS tokens from another account. Must have an allowance set beforehand.

公共函数

getCurrentVotes

getCurrentVotes(address account) external view returns (uint96)

Gets the current votes balance for account.

getPriorVotes

getPriorVotes(address account, uint blockNumber) public view returns (uint96)

Determine the prior number of votes for an account as of a block number. Block number must be a finalized block or else this function will revert to prevent misinformation.

内部函数

_moveDelegates

_moveDelegates(address srcRep, address dstRep, uint96 amount) internal

Misnomer, from Compound Finance's _moveDelegates. Helps keep track of available voting power for FXS holders.

_writeCheckpoint

_writeCheckpoint(address voter, uint32 nCheckpoints, uint96 oldVotes, uint96 newVotes) internal

From Compound Finance's governance scheme. Helps keep track of available voting power for FXS holders at a specific block. Called when a FXS token transfer, mint, or burn occurs.

safe32

safe32(uint n, string memory errorMessage) internal pure returns (uint32)

Make sure the provided int is 32 bits or less, and convert it to a uint32.

safe96

safe96(uint n, string memory errorMessage) internal pure returns (uint96)

Make sure the provided int is 96 bits or less, and convert it to a uint96.

add96

add96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96)

Add two uint96 integers safely.

sub96

sub96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96)

Subtract two uint96 integers safely.

getChainId

getChainId() internal pure returns (uint)

Return the Ethereum chain ID the contract is deployed on

事件

VoterVotesChanged

VoterVotesChanged(address indexed voter, uint previousBalance, uint newBalance)

Emitted when a voters account's vote balance changes

FXSBurned

FXSBurned(address indexed from, address indexed to, uint256 amount)

Emitted when FXS is burned, usually from a redemption by the pool

修饰符

onlyPools

onlyPools()

Restrict actions to pool contracts, e.g. minting new FXS.

onlyByOracle

onlyByOracle()

限制只有预言机可以执行的操作，例如设置 FRAX 和预言机地址。

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