governance
Cardano DRep vote rejects 7.8M ADA Summit treasury draw at 65.21%
Cardano's on-chain treasury vote for the Foundation's Singapore summit closed May 29 with 65.21% DRep stake yes, 1.46 points below the 66.67% supermajority.
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Circle freezes Zama's cUSDC wrapper for $12.6M on TRO from federal court
A U.S. federal TRO in Newton AC/DC Fund v. Ermilov forced Circle to blacklist Zama's cUSDC contract at 01:08 UTC on May 30, 2026, locking 12.6M USDC.
exploit
Gravity Bridge halted after $5.4M drain on suspected key compromise
Cosmos-Ethereum Gravity Bridge lost ~$5.4M on May 30. Peckshield and on-chain analyst Specter call it a signing key compromise. Team halted validators; attacker holds ~2,102 ETH.
protocol
Zcash Zebra 4.5.0 patches P2SH sigop bug that risked chain split
Zcash Foundation ships Zebra 4.5.0 plus a 4.5.1 hotfix, closing 15 advisories including a critical P2SH disabled-opcode sigop undercount that could split the chain.
infrastructure
DTCC connects tokenization service to Stellar for Russell 1000 and Treasuries
DTC will tokenize Russell 1000 equities, ETFs and US Treasuries on Stellar under its SEC no-action letter. First production trades targeted for July, broader rollout October.