39 lines
1.3 KiB
Solidity
39 lines
1.3 KiB
Solidity
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// SPDX-License-Identifier: Unlicense
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pragma solidity ^0.8.24;
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import {ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
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import "./ReputationHolder.sol";
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/// This contract must manage validation pools and reputation,
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/// because otherwise there's no way to enforce appropriate permissions on
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/// transfer of value between reputation NFTs.
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contract DAO is ERC721("Reputation", "REP"), ReputationHolder {
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mapping(uint256 tokenId => uint256) _tokenValues;
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uint256 _nextTokenId;
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/// Inspect the value of a given reputation NFT
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function valueOf(uint256 tokenId) public view returns (uint256 value) {
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value = _tokenValues[tokenId];
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}
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/// Internal function to mint a new reputation NFT
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function mint() internal returns (uint256 tokenId) {
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// Generate a new (sequential) ID for the token
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tokenId = _nextTokenId++;
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// Mint the token, initially to be owned by the current contract.
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_mint(address(this), tokenId);
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}
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/// Internal function to transfer value from one reputation token to another
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function transferValueFrom(
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uint256 fromTokenId,
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uint256 toTokenId,
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uint256 amount
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) internal {
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require(amount >= 0);
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require(valueOf(fromTokenId) >= amount);
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_tokenValues[fromTokenId] -= amount;
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_tokenValues[toTokenId] += amount;
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}
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}
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