feat: optimistic timelock #25
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sblOWPCKCR
reviewed
Sep 21, 2021
| function deny(bytes32 txHash) | ||
| external override auth | ||
| { | ||
| Proposal memory proposal = proposals[txHash]; |
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nit: I think you can save a tiny bit of gas with this:
Proposal storage proposal = proposals[txHash];
require(proposal.state == STATE.SCHEDULED);
proposal.state = STATE.DENIED;
^ won't need to copy storage to memory, won't need to look up storage twice
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Maybe I'm doing something wrong, but using the pattern proposed in Timelock (for which I have tests) I get these gas costs:
·--------------------------------|---------------------------|---------------|----------------------------·
| Solc version: 0.8.6 · Optimizer enabled: true · Runs: 20000 · Block limit: 9500000 gas │
·································|···························|···············|·····························
| Methods │
·············|···················|·············|·············|···············|··············|··············
| Contract · Method · Min · Max · Avg · # calls · eur (avg) │
·············|···················|·············|·············|···············|··············|··············
| Timelock · approve · 36252 · 36264 · 36263 · 32 · - │
·············|···················|·············|·············|···············|··············|··············
| Timelock · execute · 46473 · 95392 · 56780 · 19 · - │
·············|···················|·············|·············|···············|··············|··············
While copying to memory is cheaper:
·--------------------------------|---------------------------|---------------|----------------------------·
| Solc version: 0.8.6 · Optimizer enabled: true · Runs: 20000 · Block limit: 9500000 gas │
·································|···························|···············|·····························
| Methods │
·············|···················|·············|·············|···············|··············|··············
| Contract · Method · Min · Max · Avg · # calls · eur (avg) │
·············|···················|·············|·············|···············|··············|··············
| Timelock · approve · 34793 · 34805 · 34804 · 32 · - │
·············|···················|·············|·············|···············|··············|··············
| Timelock · execute · 45794 · 94713 · 56101 · 19 · - │
·············|···················|·············|·············|···············|··············|··············
devtooligan
reviewed
Sep 22, 2021
devtooligan
approved these changes
Sep 22, 2021
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With the OptimisticTimelock, all proposals are automatically approved, but an account with
denypermissions can take them off the queue.In the event of a DoS attack, simply take the
schedulepermissions from the atacker.