105 lines
3.3 KiB
Solidity
105 lines
3.3 KiB
Solidity
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// SPDX-License-Identifier: CC0-1.0
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pragma solidity ^0.8.0;
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import {ERC5050, Action} from "./ERC5050.sol";
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contract Spells is ERC5050, ERC721 {
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bytes4 constant CAST_SELECTOR = bytes4(keccak256("cast"));
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bytes4 constant ATTUNE_SELECTOR = bytes4(keccak256("attune"));
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mapping(uint256 => uint256) spellDust;
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mapping(uint256 => string) attunement;
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constructor() ERC721("Spells", unicode"🔮") {
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_registerSendable("cast");
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_registerReceivable("attune");
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}
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function sendAction(Action memory action)
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external
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payable
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override
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onlySendableAction(action)
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{
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require(
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msg.sender == ownerOf(action.from._tokenId),
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"Spells: invalid sender"
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);
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_sendAction(action);
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}
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function onActionReceived(Action calldata action, uint256 _nonce)
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external
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payable
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override
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onlyReceivableAction(action, _nonce)
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{
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if (action.selector == ATTUNE_SELECTOR) {
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string memory unicodeChar;
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bytes memory _data = action.data;
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assembly {
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// Read unicode character from first 6 bytes (\u5050)
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unicodeChar := shr(208, _data)
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}
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attunement[action.to._tokenId] = unicodeChar;
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}
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// Pass action to state receiver if specified
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_onActionReceived(action, _nonce);
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}
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string[12] private dust = [
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unicode"․",
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unicode"∴",
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unicode"`"
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];
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string[5] private spells = [
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"Conjuring",
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"Divining",
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"Transforming",
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"Hexing",
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"Banishing"
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];
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function tokenURI(uint256 tokenId)
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public
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view
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override
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returns (string memory)
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{
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string
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memory out = '<svg xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMinYMin meet" viewBox="0 0 400 350"><style>.base { fill: lightyellow; font-family: serif; font-size: 14px; } .chant { font-style: italic;} .dust {font-family: monospace; font-size: 8px; letter-spacing:5px;}.sm{font-size: 10px;} .sigil{font-family: monospace, font-size:13}</style><rect width="100%" height="100%" fill="#171717" /><text x="14" y="24" class="base">';
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out = string.concat(
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out,
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string.concat(spells[_spellType(tokenId)], " Spell"),
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'</text><text x="376" y="336" class="base sigil">',
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attunement[tokenId]
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);
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out = string.concat(out, "</text></svg>");
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string memory json = Base64.encode(
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bytes(
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string(
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abi.encodePacked(
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'{"name": "Spell #',
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Strings.toString(tokenId),
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'", "description": "Cast spells, attune spells.", "image": "data:image/svg+xml;base64,',
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Base64.encode(bytes(out)),
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'"}'
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)
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)
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)
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);
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return string(abi.encodePacked("data:application/json;base64,", json));
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}
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function _spellType(uint256 tokenId) internal pure returns (uint256) {
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uint256 rand = _random(Strings.toString(tokenId));
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return rand % 6;
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}
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function _random(string memory input) internal pure returns (uint256) {
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return uint256(keccak256(abi.encodePacked(input)));
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}
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}
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