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17 lines
404 B
17 lines
404 B
pragma solidity ^0.5.2;
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import "../drafts/Counters.sol";
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contract CountersImpl {
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using Counters for Counters.Counter;
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uint256 public theId;
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// use whatever key you want to track your counters
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mapping(string => Counters.Counter) private _counters;
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function doThing(string memory key) public returns (uint256) {
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theId = _counters[key].next();
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return theId;
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}
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}
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