84 lines
3.2 KiB
Solidity
84 lines
3.2 KiB
Solidity
// SPDX-License-Identifier: MIT OR Apache-2.0
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pragma solidity ^0.8.14;
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import "@openzeppelin/contracts/utils/Strings.sol";
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import "@openzeppelin/contracts/utils/Base64.sol";
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import "./interfaces/INFT.sol";
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contract NFTMetadata {
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function tokenURI(uint256 tokenId, INFT.TokenInfo calldata token) external view returns (string memory) {
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return
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string(
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abi.encodePacked(
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"data:application/json;base64,",
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Base64.encode(
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bytes(
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abi.encodePacked(
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'{"name": "Babies of Mars #',
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Strings.toString(tokenId),
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'", "description": "adasdasdasd", "image": "',
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token.image,
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'",{ "attributes": [ {"trait_type": "tokens", "value": ',
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addressArrayToString(token.tokens),
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'}, { "trait_type": "attack", "value": ',
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compileStatString(token)
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)
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)
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)
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)
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);
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}
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function compileStatString(INFT.TokenInfo calldata token) internal view returns (string memory) {
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return string(abi.encodePacked(
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'}, { "trait_type": "attack", "value": ',
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Strings.toString(token.attack),
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'}, { "trait_type": "defense", "value": ',
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Strings.toString(token.defense),
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'}, { "trait_type": "health", "value": ',
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Strings.toString(token.health),
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'}, { "trait_type": "critical rate", "value": ',
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Strings.toString(token.critChance),
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'}, { "trait_type": "critical damage", "value": ',
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Strings.toString(token.critDmg),
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'}, { "trait_type": "recovery", "value": ',
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Strings.toString(token.recover),
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"} ] }"
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));
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}
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function addressArrayToString(address[] memory addressArray) internal pure returns (string memory) {
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string memory result = "[";
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for(uint256 i = 0; i < addressArray.length; i++) {
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if(i == addressArray.length-1) {
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result = string.concat(result,"'0x",toAsciiString(addressArray[i]),"'");
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} else {
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result = string.concat(result,"'0x",toAsciiString(addressArray[i]),"',");
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}
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}
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result = string.concat(result,"]");
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return result;
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}
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function toAsciiString(address x) internal pure returns (string memory) {
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bytes memory s = new bytes(40);
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for (uint i = 0; i < 20; i++) {
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bytes1 b = bytes1(uint8(uint(uint160(x)) / (2**(8*(19 - i)))));
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bytes1 hi = bytes1(uint8(b) / 16);
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bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));
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s[2*i] = char(hi);
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s[2*i+1] = char(lo);
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}
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return string(s);
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}
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function char(bytes1 b) internal pure returns (bytes1 c) {
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if (uint8(b) < 10)
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return bytes1(uint8(b) + 0x30);
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else
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return bytes1(uint8(b) + 0x57);
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}
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}
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