Change crowdsales to use timestamps instead of block numbers #350
Some thoughts from my end (cross post from Slack)
Months ago I reported that the ethereum team members had agreed that a block time could not be gamed by more than a few seconds. Certainly not the 15 minutes mentioned above.
The original comment was to prevent it being used for things like rand seeds.
…e timestamps instead of block numbers (see OpenZeppelin/openzeppelin-contracts#350)