Dappsys 
Safe, simple, flexible building-blocks for smart-contract systems.
- Auth
-
ds-authds-guardds-roles - Token
-
ds-tokends-vault - Oracle
-
ds-cacheds-value - Util
-
ds-execds-mathds-noteds-proxyds-stopds-thing - Gov
-
ds-multisig
DSNote
Log function calls as events
Provides generic function call logging by way of a note modifier which
triggers the capture of data as a LogNote event containing:
msg.sig(indexed)msg.sender(indexed)- The first function parameter (indexed)
- The second function parameter (indexed)
msg.valuemsg.data
Functions decorated with the note modifier will log this information whenever
they are called with the indexed fields being queryable by blockchain clients.
This covers most usecases for events, making this an easy way to quickly add
event logging to your dapp.
/// note.sol -- the `note' modifier, for logging calls as events
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity ^0.4.13;
contract DSNote {
event LogNote(
bytes4 indexed sig,
address indexed guy,
bytes32 indexed foo,
bytes32 indexed bar,
uint wad,
bytes fax
) anonymous;
modifier note {
bytes32 foo;
bytes32 bar;
assembly {
foo := calldataload(4)
bar := calldataload(36)
}
LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);
_;
}
}