18 lines
399 B
Solidity
18 lines
399 B
Solidity
pragma solidity ^0.5.0;
|
|
|
|
import "../drafts/Counter.sol";
|
|
|
|
contract CounterImpl {
|
|
using Counter for Counter.Counter;
|
|
|
|
uint256 public theId;
|
|
|
|
// use whatever key you want to track your counters
|
|
mapping(string => Counter.Counter) private _counters;
|
|
|
|
function doThing(string memory key) public returns (uint256) {
|
|
theId = _counters[key].next();
|
|
return theId;
|
|
}
|
|
}
|