SfrxUSD

Fraxtal ERC-20 Token

0xfc00000000000000000000000000000000000008

Proxy 實作合約： 0xba026e978eb1b11d72adabf33b7cf6f3e321ca83

Solidity v0.8.30+commit.73712a01

Fungible token following the ERC-20 standard.

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參考： 0xfc00000000000000000000000000000000000008
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Fraxtal 在 Smarts 上是僅文件鏈：原始碼和 ABI 已索引，但目前不提供即時鏈上資料（狀態、最新事件、管理員概覽）。AI 代理仍可透過 MCP 呼叫 get_contract_info 和 get_contract_source。

概覽

讀取函式
23
寫入函式
22
事件
14

讀取函式

BRIDGE() view

Returns the address of the bridge contract used by this token.✨ AI

回傳值

名稱 類型 描述
— address The bridge contract address used for token bridging and cross-chain operations.✨ AI
DOMAIN_SEPARATOR() view

Returns the EIP-712 domain separator used for signing and verifying structured data.✨ AI

回傳值

名稱 類型 描述
— bytes32 The EIP-712 domain separator as a bytes32 value, used to scope and prevent replay of off-chain signatures.✨ AI
REMOTE_TOKEN() view

Returns the address of the remote token associated with this SfrxUSD contract.✨ AI

回傳值

名稱 類型 描述
— address The address of the remote token contract that this SfrxUSD token represents or is linked to.✨ AI
allowance(owner: address, spender: address) view

Returns the remaining number of tokens that spender is allowed to spend on behalf of owner.✨ AI

開發者： See {IERC20-allowance}.

參數

名稱 類型 描述
owner address Token owner address whose allowance is being queried.✨ AI
spender address Address permitted to spend tokens from the owner's balance.✨ AI

回傳值

名稱 類型 描述
— uint256 Remaining allowance as a uint256 in the token's smallest units that spender may transfer from owner.✨ AI
authorizationState(authorizer: address, nonce: bytes32) view

Returns the state of an authorization

開發者： Nonces are randomly generated 32-byte data unique to the authorizer's address

參數

名稱 類型 描述
authorizer address Authorizer's address
nonce bytes32 Nonce of the authorization

回傳值

名稱 類型 描述
— bool True if the nonce is used
balanceOf(account: address) view

Returns the token balance of the specified account.✨ AI

開發者： See {IERC20-balanceOf}.

參數

名稱 類型 描述
account address Address whose token balance will be returned.✨ AI

回傳值

名稱 類型 描述
— uint256 The number of tokens owned by the specified account, expressed in the token's smallest unit.✨ AI
bridge() view

Legacy getter for BRIDGE

回傳值

名稱 類型 描述
— address address The bridge address
decimals() view

Returns the number of decimal places the token uses.✨ AI

開發者： Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the default value returned by this function, unless it's overridden. NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}.

回傳值

名稱 類型 描述
— uint8 Number of decimal places used by the token (uint8).✨ AI
eip712Domain() view

Returns the EIP-712 domain components used to verify signed typed data.✨ AI

開發者： See {IERC-5267}.

回傳值

名稱 類型 描述
fields bytes1 fields: single byte bitmask describing which EIP-712 domain fields are present.✨ AI
name string name: human-readable name of the signing domain (token or protocol).✨ AI
version string version: domain version string used for replay protection and upgrades.✨ AI
chainId uint256 chainId: blockchain chain identifier used in the domain separation.✨ AI
verifyingContract address verifyingContract: contract address that verifies the signed typed data.✨ AI
salt bytes32 salt: domain salt or unique bytes32 identifier used in domain separation.✨ AI
extensions uint256[] extensions: array of numeric domain extension values for future compatibility.✨ AI
l1Token() view

Legacy getter for the remote token. Use REMOTE_TOKEN going forward.

回傳值

名稱 類型 描述
— address address The L1 remote token address
l2Bridge() view

Legacy getter for the bridge. Use BRIDGE going forward.

回傳值

名稱 類型 描述
— address address The bridge address
minters(address) view

Check whether a given address is authorized to mint new tokens.✨ AI

參數

名稱 類型 描述
— address

回傳值

名稱 類型 描述
— bool True if the address is an authorized minter, otherwise false.✨ AI
minters_array(uint256) view

Return the minter address at the specified index.✨ AI

參數

名稱 類型 描述
— uint256

回傳值

名稱 類型 描述
— address Minter address stored at the given index.✨ AI
name() view

Returns the token's name as a human-readable string.✨ AI

開發者： Returns the name of the token.

回傳值

名稱 類型 描述
— string The ERC-20 token name string (for example: SfrxUSD).✨ AI
nominatedOwner() view

Get the address nominated to become the contract owner.✨ AI

回傳值

名稱 類型 描述
— address The nominated owner address, or the zero address if no nomination exists.✨ AI
nonces(owner: address) view

Return the current permit nonce for an address to prevent replay of off-chain permit signatures.✨ AI

開發者： Returns the current nonce for `owner`. This value must be included whenever a signature is generated for {permit}. Every successful call to {permit} increases ``owner``'s nonce by one. This prevents a signature from being used multiple times.

參數

名稱 類型 描述
owner address Address whose permit nonce is returned.✨ AI

回傳值

名稱 類型 描述
— uint256 Current nonce (uint256) that increments each time a permit signature is used.✨ AI
owner() view

Returns the address of the account that owns the contract.✨ AI

回傳值

名稱 類型 描述
— address Address of the contract owner with administrative privileges.✨ AI
remoteToken() view

Legacy getter for REMOTE_TOKEN

回傳值

名稱 類型 描述
— address address The L1 remote token address
supportsInterface(_interfaceId: bytes4) pure

ERC165 interface check function.

參數

名稱 類型 描述
_interfaceId bytes4 Interface ID to check.

回傳值

名稱 類型 描述
— bool Whether or not the interface is supported by this contract.
symbol() view

Returns the token's short symbol used for display.✨ AI

開發者： Returns the symbol of the token, usually a shorter version of the name.

回傳值

名稱 類型 描述
— string The ERC-20 token symbol string (e.g., sfrxUSD).✨ AI
timelock_address() view

Returns the timelock contract address used to manage administrative actions for this token.✨ AI

回傳值

名稱 類型 描述
— address The address of the timelock contract that holds administrative control over the token.✨ AI
totalSupply() view

Returns the total supply of SfrxUSD tokens.✨ AI

開發者： See {IERC20-totalSupply}.

回傳值

名稱 類型 描述
— uint256 The total number of SfrxUSD tokens in existence as a uint256, expressed in the token's smallest unit.✨ AI
version() pure

Getter for the semantic version of the contract. This is not meant to be used onchain but instead meant to be used by offchain tooling.

回傳值

名稱 類型 描述
— string Semver contract version as a string.

寫入函式

acceptOwnership() nonpayable

Allow the nominated owner to accept and become the contract owner.✨ AI

addMinter(minter_address: address) nonpayable

Adds a non-bridge minter

參數

名稱 類型 描述
minter_address address Address of minter to add
approve(spender: address, value: uint256) nonpayable

Allow a spender to transfer up to a specified number of tokens from your account.✨ AI

開發者： See {IERC20-approve}. NOTE: If `value` is the maximum `uint256`, the allowance is not updated on `transferFrom`. This is semantically equivalent to an infinite approval. Requirements: - `spender` cannot be the zero address.

參數

名稱 類型 描述
spender address Address allowed to transfer tokens.✨ AI
value uint256 Maximum token amount the spender is authorized to transfer.✨ AI

回傳值

名稱 類型 描述
— bool True if the approval succeeded; otherwise false.✨ AI
burn(value: uint256) nonpayable

Allows the StandardBridge on this network to burn tokens.

參數

名稱 類型 描述
value uint256
burn(_from: address, _amount: uint256) nonpayable

Allows the StandardBridge on this network to burn tokens.

參數

名稱 類型 描述
_from address Address to burn tokens from.
_amount uint256 Amount of tokens to burn.
burnFrom(account: address, value: uint256) nonpayable

Burns tokens from account using the caller's allowance and reduces total supply.✨ AI

開發者： Destroys a `value` amount of tokens from `account`, deducting from the caller's allowance. See {ERC20-_burn} and {ERC20-allowance}. Requirements: - the caller must have allowance for ``accounts``'s tokens of at least `value`.

參數

名稱 類型 描述
account address Address whose tokens will be burned.✨ AI
value uint256 Amount of tokens to burn, expressed in the token's smallest unit.✨ AI
cancelAuthorization(authorizer: address, nonce: bytes32, v: uint8, r: bytes32, s: bytes32) nonpayable

The ```cancelAuthorization``` function cancels an authorization nonce

開發者： EOA wallet signatures should be packed in the order of r, s, v

參數

名稱 類型 描述
authorizer address Authorizer's address
nonce bytes32 Nonce of the authorization
v uint8 ECDSA signature v value
r bytes32 ECDSA signature r value
s bytes32 ECDSA signature s value
cancelAuthorization(authorizer: address, nonce: bytes32, signature: bytes) nonpayable

The ```cancelAuthorization``` function cancels an authorization nonce

開發者： EOA wallet signatures should be packed in the order of r, s, v

參數

名稱 類型 描述
authorizer address Authorizer's address
nonce bytes32 Nonce of the authorization
signature bytes
mint(_to: address, _amount: uint256) nonpayable

Allows the StandardBridge on this network to mint tokens.

參數

名稱 類型 描述
_to address Address to mint tokens to.
_amount uint256 Amount of tokens to mint.
minter_burn_from(b_address: address, b_amount: uint256) nonpayable

Used by non-bridge minters to burn tokens

參數

名稱 類型 描述
b_address address Address of the account to burn from
b_amount uint256 Amount of tokens to burn
minter_mint(m_address: address, m_amount: uint256) nonpayable

Used by non-bridge minters to mint new tokens

參數

名稱 類型 描述
m_address address Address of the account to mint to
m_amount uint256 Amount of tokens to mint
nominateNewOwner(_owner: address) nonpayable

Nominate a new owner candidate for the contract; the nominee must accept to become the actual owner.✨ AI

參數

名稱 類型 描述
_owner address Address to nominate as the pending owner (the candidate must accept ownership).✨ AI
permit(owner: address, spender: address, value: uint256, deadline: uint256, signature: bytes) nonpayable

Allows an owner to set a spender's allowance using an off-chain signature (EIP-2612) without an on-chain approve call.✨ AI

開發者： Sets `value` as the allowance of `spender` over ``owner``'s tokens, given ``owner``'s signed approval. IMPORTANT: The same issues {IERC20-approve} has related to transaction ordering also apply here. Emits an {Approval} event. Requirements: - `spender` cannot be the zero address. - `deadline` must be a timestamp in the future. - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` over the EIP712-formatted function arguments. - the signature must use ``owner``'s current nonce (see {nonces}). For more information on the signature format, see the https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP section]. CAUTION: See Security Considerations above.

參數

名稱 類型 描述
owner address Address of the token holder granting the allowance.✨ AI
spender address Address authorized to spend the owner's tokens.✨ AI
value uint256 Allowance amount to set (in token smallest units).✨ AI
deadline uint256 Unix timestamp after which the provided signature is invalid.✨ AI
signature bytes
permit(owner: address, spender: address, value: uint256, deadline: uint256, v: uint8, r: bytes32, s: bytes32) nonpayable

Allows an owner to set a spender's allowance using an off-chain signature (EIP-2612) without an on-chain approve call.✨ AI

開發者： Sets `value` as the allowance of `spender` over ``owner``'s tokens, given ``owner``'s signed approval. IMPORTANT: The same issues {IERC20-approve} has related to transaction ordering also apply here. Emits an {Approval} event. Requirements: - `spender` cannot be the zero address. - `deadline` must be a timestamp in the future. - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` over the EIP712-formatted function arguments. - the signature must use ``owner``'s current nonce (see {nonces}). For more information on the signature format, see the https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP section]. CAUTION: See Security Considerations above.

參數

名稱 類型 描述
owner address Address of the token holder granting the allowance.✨ AI
spender address Address authorized to spend the owner's tokens.✨ AI
value uint256 Allowance amount to set (in token smallest units).✨ AI
deadline uint256 Unix timestamp after which the provided signature is invalid.✨ AI
v uint8 ECDSA recovery id component of the signature.✨ AI
r bytes32 First 32-byte word of the ECDSA signature.✨ AI
s bytes32 Second 32-byte word of the ECDSA signature.✨ AI
receiveWithAuthorization(from: address, to: address, value: uint256, validAfter: uint256, validBefore: uint256, nonce: bytes32, signature: bytes) nonpayable

The ```receiveWithAuthorization``` function receives a transfer with a signed authorization from the payer

開發者： EOA wallet signatures should be packed in the order of r, s, v

參數

名稱 類型 描述
from address Payer's address (Authorizer)
to address Payee's address
value uint256 Amount to be transferred
validAfter uint256 The block.timestamp after which the authorization is valid
validBefore uint256 The block.timestamp before which the authorization is valid
nonce bytes32 Unique nonce
signature bytes
receiveWithAuthorization(from: address, to: address, value: uint256, validAfter: uint256, validBefore: uint256, nonce: bytes32, v: uint8, r: bytes32, s: bytes32) nonpayable

The ```receiveWithAuthorization``` function receives a transfer with a signed authorization from the payer

開發者： EOA wallet signatures should be packed in the order of r, s, v

參數

名稱 類型 描述
from address Payer's address (Authorizer)
to address Payee's address
value uint256 Amount to be transferred
validAfter uint256 The block.timestamp after which the authorization is valid
validBefore uint256 The block.timestamp before which the authorization is valid
nonce bytes32 Unique nonce
v uint8 ECDSA signature parameter v
r bytes32 ECDSA signature parameters r
s bytes32 ECDSA signature parameters s
removeMinter(minter_address: address) nonpayable

Removes a non-bridge minter

參數

名稱 類型 描述
minter_address address Address of minter to remove
setTimelock(_timelock_address: address) nonpayable

Sets the timelock address

參數

名稱 類型 描述
_timelock_address address Address of the timelock
transfer(to: address, value: uint256) nonpayable

Transfer tokens from your account to the specified address.✨ AI

開發者： See {IERC20-transfer}. Requirements: - `to` cannot be the zero address. - the caller must have a balance of at least `value`.

參數

名稱 類型 描述
to address Recipient address that will receive the tokens.✨ AI
value uint256 Number of tokens to transfer, specified in the token's smallest unit.✨ AI

回傳值

名稱 類型 描述
— bool True if the transfer succeeded, otherwise false.✨ AI
transferFrom(from: address, to: address, value: uint256) nonpayable

Transfers tokens from one address to another using the caller's allowance.✨ AI

開發者： See {IERC20-transferFrom}. Skips emitting an {Approval} event indicating an allowance update. This is not required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve]. NOTE: Does not update the allowance if the current allowance is the maximum `uint256`. Requirements: - `from` and `to` cannot be the zero address. - `from` must have a balance of at least `value`. - the caller must have allowance for ``from``'s tokens of at least `value`.

參數

名稱 類型 描述
from address Source address whose tokens will be transferred.✨ AI
to address Destination address that will receive the tokens.✨ AI
value uint256 Amount of tokens to transfer, in the token's smallest unit.✨ AI

回傳值

名稱 類型 描述
— bool True if the transfer succeeded.✨ AI
transferWithAuthorization(from: address, to: address, value: uint256, validAfter: uint256, validBefore: uint256, nonce: bytes32, signature: bytes) nonpayable

The ```transferWithAuthorization``` function executes a transfer with a signed authorization according to Eip3009

開發者： added in v1.1.0

參數

名稱 類型 描述
from address Payer's address (Authorizer)
to address Payee's address
value uint256 Amount to be transferred
validAfter uint256 The block.timestamp after which the authorization is valid
validBefore uint256 The block.timestamp before which the authorization is valid
nonce bytes32 Unique nonce
signature bytes
transferWithAuthorization(from: address, to: address, value: uint256, validAfter: uint256, validBefore: uint256, nonce: bytes32, v: uint8, r: bytes32, s: bytes32) nonpayable

The ```transferWithAuthorization``` function executes a transfer with a signed authorization according to Eip3009

開發者： added in v1.1.0

參數

名稱 類型 描述
from address Payer's address (Authorizer)
to address Payee's address
value uint256 Amount to be transferred
validAfter uint256 The block.timestamp after which the authorization is valid
validBefore uint256 The block.timestamp before which the authorization is valid
nonce bytes32 Unique nonce
v uint8 ECDSA signature parameter v
r bytes32 ECDSA signature parameters r
s bytes32 ECDSA signature parameters s

事件

Approval(owner: address, spender: address, value: uint256)
名稱 類型 已索引 描述
owner address ✓
spender address ✓
value uint256
AuthorizationCanceled(authorizer: address, nonce: bytes32)

```AuthorizationCanceled``` event is emitted when an authorization is canceled

名稱 類型 已索引 描述
authorizer address ✓ Authorizer's address
nonce bytes32 ✓ Nonce of the authorization
AuthorizationUsed(authorizer: address, nonce: bytes32)

```AuthorizationUsed``` event is emitted when an authorization is used

名稱 類型 已索引 描述
authorizer address ✓ Authorizer's address
nonce bytes32 ✓ Nonce of the authorization
Burn(account: address, amount: uint256)

Emitted whenever the bridge burns tokens from an account

名稱 類型 已索引 描述
account address ✓ Address of the account tokens are being burned from
amount uint256 Amount of tokens burned
EIP712DomainChanged()
Mint(account: address, amount: uint256)

Emitted whenever the bridge mints tokens to an account

名稱 類型 已索引 描述
account address ✓ Address of the account tokens are being minted for
amount uint256 Amount of tokens minted.
MinterAdded(minter_address: address)

Emitted when a non-bridge minter is added

名稱 類型 已索引 描述
minter_address address Address of the new minter
MinterRemoved(minter_address: address)

Emitted when a non-bridge minter is removed

名稱 類型 已索引 描述
minter_address address Address of the removed minter
OwnerChanged(oldOwner: address, newOwner: address)
名稱 類型 已索引 描述
oldOwner address
newOwner address
OwnerNominated(newOwner: address)
名稱 類型 已索引 描述
newOwner address
TimelockChanged(timelock_address: address)

Emitted when the timelock address changes

名稱 類型 已索引 描述
timelock_address address Address of the removed timelock
TokenMinterBurned(from: address, to: address, amount: uint256)

Emitted when a non-bridge minter burns tokens

名稱 類型 已索引 描述
from address ✓ The account whose tokens are burned
to address ✓ The minter doing the burning
amount uint256 Amount of tokens burned
TokenMinterMinted(from: address, to: address, amount: uint256)

Emitted when a non-bridge minter mints tokens

名稱 類型 已索引 描述
from address ✓ The minter doing the minting
to address ✓ The account that gets the newly minted tokens
amount uint256 Amount of tokens minted
Transfer(from: address, to: address, value: uint256)
名稱 類型 已索引 描述
from address ✓
to address ✓
value uint256