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Validiums and Optimiums are L2s that, similarly to Rollups, periodically post state commitments to Ethereum that are validated by it, however data is not posted to Ethereum. This means that additional trust assumptions, external to Ethereum, are introduced to prevent data withholding attacks.
# | name | Proof system | DA Layer | DA Bridge | Risks | Type of data | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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1 | ![]() | Validity Boojum | State diffs Compressed | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
2 | ![]() | Optimistic BoLD | Transaction data Compressed | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3 | ![]() | Validity Boojum | State diffs Compressed |