78 lines
2.5 KiB
Solidity
78 lines
2.5 KiB
Solidity
// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC6909/extensions/draft-ERC6909Metadata.sol)
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pragma solidity ^0.8.20;
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import {ERC6909} from "../draft-ERC6909.sol";
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import {IERC6909Metadata} from "../../../interfaces/draft-IERC6909.sol";
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/**
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* @dev Implementation of the Metadata extension defined in ERC6909. Exposes the name, symbol, and decimals of each token id.
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*/
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contract ERC6909Metadata is ERC6909, IERC6909Metadata {
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struct TokenMetadata {
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string name;
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string symbol;
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uint8 decimals;
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}
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mapping(uint256 id => TokenMetadata) private _tokenMetadata;
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/// @dev The name of the token of type `id` was updated to `newName`.
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event ERC6909NameUpdated(uint256 indexed id, string newName);
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/// @dev The symbol for the token of type `id` was updated to `newSymbol`.
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event ERC6909SymbolUpdated(uint256 indexed id, string newSymbol);
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/// @dev The decimals value for token of type `id` was updated to `newDecimals`.
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event ERC6909DecimalsUpdated(uint256 indexed id, uint8 newDecimals);
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/// @inheritdoc IERC6909Metadata
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function name(uint256 id) public view virtual override returns (string memory) {
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return _tokenMetadata[id].name;
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}
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/// @inheritdoc IERC6909Metadata
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function symbol(uint256 id) public view virtual override returns (string memory) {
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return _tokenMetadata[id].symbol;
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}
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/// @inheritdoc IERC6909Metadata
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function decimals(uint256 id) public view virtual override returns (uint8) {
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return _tokenMetadata[id].decimals;
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}
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/**
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* @dev Sets the `name` for a given token of type `id`.
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*
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* Emits an {ERC6909NameUpdated} event.
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*/
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function _setName(uint256 id, string memory newName) internal virtual {
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_tokenMetadata[id].name = newName;
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emit ERC6909NameUpdated(id, newName);
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}
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/**
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* @dev Sets the `symbol` for a given token of type `id`.
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*
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* Emits an {ERC6909SymbolUpdated} event.
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*/
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function _setSymbol(uint256 id, string memory newSymbol) internal virtual {
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_tokenMetadata[id].symbol = newSymbol;
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emit ERC6909SymbolUpdated(id, newSymbol);
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}
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/**
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* @dev Sets the `decimals` for a given token of type `id`.
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*
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* Emits an {ERC6909DecimalsUpdated} event.
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*/
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function _setDecimals(uint256 id, uint8 newDecimals) internal virtual {
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_tokenMetadata[id].decimals = newDecimals;
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emit ERC6909DecimalsUpdated(id, newDecimals);
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}
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}
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