USDT
Optimism ERC-20 Token0x94b008aa00579c1307b0ef2c499ad98a8ce58e58
Solidity v0.7.6
Fungible token following the ERC-20 standard.
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引用：
usdt-optimism
0x94b008aa00579c1307b0ef2c499ad98a8ce58e58
示例提示词：
"Tell me the current state of usdt-optimism"
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mcp.smarts.md
管理与风险
谁能修改规则？
Detected mintable controls from the verified ABI.
Mintable
概览
读取函数
9
写入函数
7
事件
4
读取函数
Block #152,088,311 · just now
allowance(owner: address, spender: address)
view
Returns the remaining number of tokens that spender is allowed to transfer from owner.✨ AI
开发者： Returns the remaining number of tokens that `spender` will be allowed to spend on behalf of `owner` through {transferFrom}. This is zero by default. This value changes when {approve} or {transferFrom} are called.
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| owner | address | Address that owns the tokens.✨ AI |
| spender | address | Address authorized to spend the owner's tokens.✨ AI |
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | uint256 | Remaining allowance expressed in the token's smallest units (uint256) that spender may transfer from owner.✨ AI |
balanceOf(account: address)
view
Returns the token balance for the specified account.✨ AI
开发者： Returns the amount of tokens owned by `account`.
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| account | address | Address whose token balance will be returned.✨ AI |
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | uint256 | The account's token balance as a uint256.✨ AI |
decimals()
view
→ 6
Returns the number of decimals used to display token amounts.✨ AI
开发者： 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 value {ERC20} uses, unless {_setupDecimals} is called. 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}.
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | uint8 | The token's decimal precision: the number of decimal places (uint8).✨ AI |
l1Token()
view
→ 0xdac17f958d2ee523a2206206994597c13d831ec7
Returns the address of the corresponding L1 token.✨ AI
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | address | The L1 token contract address that corresponds to this token.✨ AI |
l2Bridge()
view
→ 0x4200000000000000000000000000000000000010
Returns the address of the token's L2 bridge.✨ AI
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | address | The address of the Layer-2 bridge contract associated with this token.✨ AI |
name()
view
→ Tether USD
Returns the token's name as a human-readable string.✨ AI
开发者： Returns the name of the token.
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | string | The token name string (e.g., "Tether USD").✨ AI |
supportsInterface(_interfaceId: bytes4)
pure
Report whether the contract implements the interface with the given ERC-165 id.✨ AI
开发者： Returns true if this contract implements the interface defined by `interfaceId`. See the corresponding https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] to learn more about how these ids are created. This function call must use less than 30 000 gas.
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| _interfaceId | bytes4 | The 4-byte ERC-165 interface identifier to check.✨ AI |
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | bool | True if the contract claims to implement the interface id, false otherwise.✨ AI |
symbol()
view
→ USDT
Returns the token's symbol used in wallets and user interfaces.✨ AI
开发者： Returns the symbol of the token, usually a shorter version of the name.
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | string | The token's short symbol, e.g. USDT, suitable for display in wallets and user interfaces.✨ AI |
totalSupply()
view
→ 179,336,864.16 USDT
Returns the total number of tokens in existence.✨ AI
开发者： Returns the amount of tokens in existence.
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | uint256 | Total token supply in the token's smallest unit (uint256).✨ AI |
写入函数
approve(spender: address, amount: uint256)
nonpayable
Approve a spender to transfer up to a specified amount of your USDT tokens.✨ AI
开发者： Sets `amount` as the allowance of `spender` over the caller's tokens. Returns a boolean value indicating whether the operation succeeded. IMPORTANT: Beware that changing an allowance with this method brings the risk that someone may use both the old and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 Emits an {Approval} event.
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| spender | address | Address allowed to spend tokens from the caller's balance.✨ AI |
| amount | uint256 | Maximum token amount the spender is permitted to transfer (in smallest unit).✨ AI |
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | bool | True if the approval was successful; otherwise false.✨ AI |
burn(_from: address, _amount: uint256)
nonpayable
Burns a specified token amount from the given address, decreasing the caller's token balance and total supply.✨ AI
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| _from | address | Address whose tokens will be burned.✨ AI |
| _amount | uint256 | Amount of tokens to burn, specified in the token's smallest unit.✨ AI |
decreaseAllowance(spender: address, subtractedValue: uint256)
nonpayable
Decrease the caller's ERC-20 allowance for a spender by subtractedValue.✨ AI
开发者： Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`.
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| spender | address | Address whose allowance for the caller will be decreased.✨ AI |
| subtractedValue | uint256 | Amount to subtract from the current allowance (in token smallest units).✨ AI |
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | bool | True if the allowance was successfully decreased.✨ AI |
increaseAllowance(spender: address, addedValue: uint256)
nonpayable
Increase the allowance granted to a spender by the caller.✨ AI
开发者： Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address.
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| spender | address | Address that will be allowed to spend the caller's tokens.✨ AI |
| addedValue | uint256 | Amount of tokens to add to the spender's current allowance.✨ AI |
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | bool | True if the allowance was successfully increased, otherwise false.✨ AI |
mint(_to: address, _amount: uint256)
nonpayable
Mint new USDT tokens and assign them to the specified address, increasing total supply.✨ AI
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| _to | address | Address that will receive the newly minted tokens.✨ AI |
| _amount | uint256 | Number of tokens to mint, expressed in the token's smallest unit.✨ AI |
transfer(recipient: address, amount: uint256)
nonpayable
Transfer tokens from the caller's account to the recipient.✨ AI
开发者： Moves `amount` tokens from the caller's account to `recipient`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event.
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| recipient | address | Address to receive the tokens.✨ AI |
| amount | uint256 | Amount of tokens to transfer, in the token's smallest unit.✨ AI |
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | bool | True if the transfer succeeded; otherwise false.✨ AI |
transferFrom(sender: address, recipient: address, amount: uint256)
nonpayable
Transfer tokens from sender to recipient using the caller's approved allowance.✨ AI
开发者： Moves `amount` tokens from `sender` to `recipient` using the allowance mechanism. `amount` is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event.
参数
| 名称 | 类型 | 描述 |
|---|---|---|
| sender | address | Address to withdraw tokens from.✨ AI |
| recipient | address | Address to receive the tokens.✨ AI |
| amount | uint256 | Number of tokens to transfer, specified in the token's smallest unit.✨ AI |
返回值
| 名称 | 类型 | 描述 |
|---|---|---|
| — | bool | True if the transfer succeeded.✨ AI |
事件
Approval(owner: address, spender: address, value: uint256)
| 名称 | 类型 | 已索引 | 描述 |
|---|---|---|---|
| owner | address | ✓ | |
| spender | address | ✓ | |
| value | uint256 |
Burn(_account: address, _amount: uint256)
| 名称 | 类型 | 已索引 | 描述 |
|---|---|---|---|
| _account | address | ✓ | |
| _amount | uint256 |
Mint(_account: address, _amount: uint256)
| 名称 | 类型 | 已索引 | 描述 |
|---|---|---|---|
| _account | address | ✓ | |
| _amount | uint256 |
Transfer(from: address, to: address, value: uint256)
| 名称 | 类型 | 已索引 | 描述 |
|---|---|---|---|
| from | address | ✓ | |
| to | address | ✓ | |
| value | uint256 |