2021-02-04-ydai-v1

yDAI v1

Date: 4th of February 2021
Total losses: ~$11M

Data

• Addresses impacted: ydai-snapshot.csv
• Active Yearn covers on Nexus Mutual at the time of the incident:
  • Covers that require proof of loss
  • Covers that do NOT require proof of loss

Note: To easily visualize the historic transfers of yDAI to and from a given address, use https://etherscan.io/token/0xacd43e627e64355f1861cec6d3a6688b31a6f952?a=<insert_address_here>

The included ydai-snapshot.csv was provided by Yearn team and contains a snapshot of the yDAI balances (vault shares) at block 11792183. The pre-dai column contains the price of the shares in DAI at the snapshot block (before the hack). The post-dai contains the price of the shares in DAI at block 11792352.

The snapshot accounts for the yDAI that were sent to exchanges: the LP tokens were unwrapped and the accounts included in the list.

There were no transfers during the period except for a single deposit between the blocks from 0x577e56C834998f8Fa7eaCA666582691AD4Fd9de4:

• pre deposit shares: 716.4068974658735
• post deposit shares: 80190.61994701486

All addresses have suffered a 31.6% loss.

References

• Yearn post mortem: vulnerability analysis and disclosure
• The yDAI Incident Analysis: Forced Investment by PeckShield