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https://github.com/rjNemo/epicNFT
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deploy dynamic NFTs
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Ruidy
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3 changed files with 204 additions and 7 deletions
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@ -2,9 +2,12 @@
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Demo NFT collection for learning purposes.
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## OPenSea Testnet
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1. https://testnets.opensea.io/collection/squarenft-cd2xk3yh7v
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2. https://testnets.opensea.io/collection/squarenft-bndes4idpq
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## OpenSea Testnet
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1. https://testnets.opensea.io/collection/squarenft-cd2xk3yh7v
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2. https://testnets.opensea.io/collection/squarenft-bndes4idpq
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3. https://testnets.opensea.io/collection/squarenft-lemz9demvy
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4. https://testnets.opensea.io/collection/squarenft-1xkwn34mdz
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## Square NFT
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@ -4,6 +4,7 @@ pragma solidity ^0.8.0;
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import "hardhat/console.sol";
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import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
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import "@openzeppelin/contracts/utils/Counters.sol";
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import "../lib/Base64.sol";
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contract EpicNFT is ERC721URIStorage {
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using Counters for Counters.Counter;
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@ -13,14 +14,129 @@ contract EpicNFT is ERC721URIStorage {
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console.log("My first NFT contract! EPIC!!!");
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}
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string baseSvg1 =
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"<svg xmlns='http://www.w3.org/2000/svg' preserveAspectRatio='xMinYMin meet' viewBox='0 0 350 350'><style>.base { fill:";
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string baseSvg2 =
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"; font-family: serif; font-size: 24px; }</style><rect width='100%' height='100%' fill='black' /><text x='50%' y='50%' class='base' dominant-baseline='middle' text-anchor='middle'>";
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string[] colors = [
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"red",
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"green",
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"blue",
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"white",
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"yellow",
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"cyan",
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"pink",
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"magenta",
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"silver",
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"gold"
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];
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string[] levels = [
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"Epic",
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"Legendary",
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"Heroic",
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"Cool",
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"Fantastic",
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"Terrible",
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"Crazy",
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"Wild",
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"Terrifying",
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"Spooky"
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];
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string[] classes = [
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"Assassin",
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"Cleric",
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"Rogue",
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"Ninja",
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"Lord",
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"Wizard",
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"Warrior",
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"Berserker",
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"Necromander",
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"Summoner",
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"Bard",
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"Lancer"
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];
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string[] jobs = [
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"Soldier",
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"Healer",
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"Explorer",
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"Merchant",
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"Developer",
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"BlackSmith",
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"Hitman",
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"Cook",
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"Hunter",
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"Sailor"
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];
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function mint() public {
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uint256 tokenID = _tokenIds.current();
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_safeMint(msg.sender, tokenID);
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_setTokenURI(
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tokenID,
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"data:application/json;base64,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"
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string memory color = pickRandomWord(colors, "color", tokenID);
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string memory first = pickRandomWord(levels, "first", tokenID);
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string memory second = pickRandomWord(classes, "second", tokenID);
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string memory third = pickRandomWord(jobs, "third", tokenID);
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string memory finalWord = string(
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abi.encodePacked(color, first, second, third)
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);
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string memory finalSvg = string(
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abi.encodePacked(
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baseSvg1,
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color,
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baseSvg2,
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first,
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second,
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third,
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"</text></svg>"
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)
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);
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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": "',
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finalWord,
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'", "description": "A highly acclaimed collection of squares.", "image": "data:image/svg+xml;base64,',
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Base64.encode(bytes(finalSvg)),
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'"}'
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)
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)
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)
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);
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string memory tokenUri = string(
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abi.encodePacked("data:application/json;base64,", json)
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);
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console.log("\n--------------------");
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console.log(tokenUri);
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console.log("--------------------\n");
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_safeMint(msg.sender, tokenID);
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_setTokenURI(tokenID, tokenUri);
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console.log("NFT %s minted to %s", tokenID, msg.sender);
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_tokenIds.increment();
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}
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function pickRandomWord(
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string[] memory words,
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string memory position,
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uint256 tokenID
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) public pure returns (string memory) {
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uint256 rand = random(
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string(abi.encodePacked(position, Strings.toString(tokenID)))
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);
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rand = rand % words.length;
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return words[rand];
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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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78
lib/Base64.sol
Normal file
78
lib/Base64.sol
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@ -0,0 +1,78 @@
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/**
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*Submitted for verification at Etherscan.io on 2021-09-05
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*/
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.0;
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/// [MIT License]
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/// @title Base64
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/// @notice Provides a function for encoding some bytes in base64
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/// @author Brecht Devos <brecht@loopring.org>
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library Base64 {
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bytes internal constant TABLE =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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/// @notice Encodes some bytes to the base64 representation
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function encode(bytes memory data) internal pure returns (string memory) {
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uint256 len = data.length;
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if (len == 0) return "";
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// multiply by 4/3 rounded up
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uint256 encodedLen = 4 * ((len + 2) / 3);
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// Add some extra buffer at the end
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bytes memory result = new bytes(encodedLen + 32);
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bytes memory table = TABLE;
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assembly {
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let tablePtr := add(table, 1)
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let resultPtr := add(result, 32)
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for {
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let i := 0
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} lt(i, len) {
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} {
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i := add(i, 3)
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let input := and(mload(add(data, i)), 0xffffff)
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let out := mload(add(tablePtr, and(shr(18, input), 0x3F)))
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out := shl(8, out)
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out := add(
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out,
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and(mload(add(tablePtr, and(shr(12, input), 0x3F))), 0xFF)
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)
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out := shl(8, out)
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out := add(
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out,
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and(mload(add(tablePtr, and(shr(6, input), 0x3F))), 0xFF)
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)
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out := shl(8, out)
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out := add(
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out,
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and(mload(add(tablePtr, and(input, 0x3F))), 0xFF)
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)
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out := shl(224, out)
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mstore(resultPtr, out)
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resultPtr := add(resultPtr, 4)
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}
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switch mod(len, 3)
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case 1 {
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mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
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}
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case 2 {
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mstore(sub(resultPtr, 1), shl(248, 0x3d))
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}
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mstore(result, encodedLen)
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}
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return string(result);
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}
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}
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