WBTC
Optimism ERC-20 Token0x68f180fcce6836688e9084f035309e29bf0a2095
Solidity v0.7.6
Fungible token following the ERC-20 standard.
🤖
透過你的 AI 查詢此合約
參考：
0x68f180fcce6836688e9084f035309e29bf0a2095
範例提示詞：
"Tell me the current state of optimism/0x68f180fcce6836688e9084f035309e29bf0a2095"
還沒有接入 AI？→
mcp.smarts.md
管理與風險
誰能修改規則？
Detected mintable controls from the verified ABI.
Mintable
概覽
讀取函式
9
寫入函式
7
事件
4
讀取函式
Block #152,084,147 · just now
allowance(owner: address, spender: address)
view
Returns the remaining number of tokens that spender is allowed to transfer from owner.✨ AI
開發者： 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.
參數
| 名稱 | 類型 | 描述 |
|---|---|---|
| owner | address | Address that owns the tokens.✨ AI |
| spender | address | Address authorized to spend the owner's tokens.✨ AI |
回傳值
| 名稱 | 類型 | 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
開發者： Returns the amount of tokens owned by `account`.
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 account's token balance as a uint256.✨ AI |
decimals()
view
→ 8
Returns the number of decimals used to display token amounts.✨ 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 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}.
回傳值
| 名稱 | 類型 | 描述 |
|---|---|---|
| — | uint8 | The token's decimal precision: the number of decimal places (uint8).✨ AI |
l1Token()
view
→ 0x2260fac5e5542a773aa44fbcfedf7c193bc2c599
Returns the address of the corresponding L1 token.✨ AI
回傳值
| 名稱 | 類型 | 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
回傳值
| 名稱 | 類型 | 描述 |
|---|---|---|
| — | address | The address of the Layer-2 bridge contract associated with this token.✨ AI |
name()
view
→ Wrapped BTC
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 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
開發者： 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.
參數
| 名稱 | 類型 | 描述 |
|---|---|---|
| _interfaceId | bytes4 | The 4-byte ERC-165 interface identifier to check.✨ AI |
回傳值
| 名稱 | 類型 | 描述 |
|---|---|---|
| — | bool | True if the contract claims to implement the interface id, false otherwise.✨ AI |
symbol()
view
→ WBTC
Returns the token's symbol used in wallets and user interfaces.✨ 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 token's short symbol, e.g. USDT, suitable for display in wallets and user interfaces.✨ AI |
totalSupply()
view
→ 799.82 WBTC
Returns the total number of tokens in existence.✨ AI
開發者： Returns the amount of tokens in existence.
回傳值
| 名稱 | 類型 | 描述 |
|---|---|---|
| — | uint256 | Total token supply in the token's smallest unit (uint256).✨ AI |
寫入函式
approve(spender: address, amount: uint256)
nonpayable
Approve a spender to transfer up to a specified amount of your USDT tokens.✨ AI
開發者： 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.
參數
| 名稱 | 類型 | 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 |
回傳值
| 名稱 | 類型 | 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
參數
| 名稱 | 類型 | 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
開發者： 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`.
參數
| 名稱 | 類型 | 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 |
回傳值
| 名稱 | 類型 | 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
開發者： 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.
參數
| 名稱 | 類型 | 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 |
回傳值
| 名稱 | 類型 | 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
參數
| 名稱 | 類型 | 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
開發者： Moves `amount` tokens from the caller's account to `recipient`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event.
參數
| 名稱 | 類型 | 描述 |
|---|---|---|
| recipient | address | Address to receive the tokens.✨ AI |
| amount | uint256 | Amount of tokens to transfer, in the token's smallest unit.✨ AI |
回傳值
| 名稱 | 類型 | 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
開發者： 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.
參數
| 名稱 | 類型 | 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 |
回傳值
| 名稱 | 類型 | 描述 |
|---|---|---|
| — | bool | True if the transfer succeeded.✨ AI |
事件
Approval(owner: address, spender: address, value: uint256)
| 名稱 | 類型 | 已索引 | 描述 |
|---|---|---|---|
| owner | address | ✓ | |
| spender | address | ✓ | |
| value | uint256 |
Burn(_account: address, _amount: uint256)
| 名稱 | 類型 | 已索引 | 描述 |
|---|---|---|---|
| _account | address | ✓ | |
| _amount | uint256 |
Mint(_account: address, _amount: uint256)
| 名稱 | 類型 | 已索引 | 描述 |
|---|---|---|---|
| _account | address | ✓ | |
| _amount | uint256 |
Transfer(from: address, to: address, value: uint256)
| 名稱 | 類型 | 已索引 | 描述 |
|---|---|---|---|
| from | address | ✓ | |
| to | address | ✓ | |
| value | uint256 |