Events

(* Events are records. `indexed` fields become topics; at most three per event. *)
 
import "std/evm";
 
event Transfer of record {
  indexed from : address;
  indexed to : address;
  amount : uint;
}
 
(* An indexed string or list is logged as its keccak256 hash, as in Solidity. *)
event Renamed of record {
  indexed name : string;
  by : address;
}
 
event Ping of record {}
 
storage is record {
  name : string;
}
 
external function send(const to : address; const amount : uint) is {
  emit Transfer { from = Evm.sender(); to = to; amount = amount; };
}
 
external function rename(const name : string) is {
  storage.name := name;
  emit Renamed { name = name; by = Evm.sender(); };
}
 
external function ping() is {
  emit Ping {};
}