On July 9th 2018 at 18:01 UTC (11:01 AM PDT), Augur’s contracts were deployed to the main Ethereum network and we conducted a migration of all REP token balances beforehand, so that the new REP tokens exist inside the Augur genesis universe.
We disabled REP funding (deposits and withdrawals) at 17:01 UTC (10:01 AM PDT) on July 9th 2018. REP funding remained offline until we confirmed that the migration was successful and that all clients can securely transact to and from our exchange.
Clients who withdraw REP from Kraken before the migration are responsible for storing their REP tokens for proper migration, as the current REP token contract will be frozen indefinitely upon migration. (in either a private wallet, upon a centralised exchange also conducting the migration, or under an account of a non-custodial decentralised exchange). Be aware that under custodial decentralised exchanges, clients have no control over the contract and therefore no guarantee that their tokens will be migrated successfully on their behalf.
Additional resources: