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The Dawn of Bitcoin Programmability: Paving the Way for Rollups
By
Anil Lulla•
Bitcoin's scripting system is inherently limited in its programmability. Consequently, bridges to Bitcoin rely on multisigs and federation control, introducing trust. This has constrained Bitcoin's utility.
Recent advancements are enhancing programmability on Bitcoin. BitVM, its successors, and CatVM are enabling the verification of off-chain programs on Bitcoin through fraud proofs. This improves the current state of bridging on Bitcoin, minimizing the reliance on trusted multisig setups and federated bridges.
This report explores these recent advancements, including BitVM, CatVM, Lamport signatures, and the proposed OP_CAT opcode, along with their implications for trust-minimized bridging & zk-rollups on Bitcoin.

zkEVMs Launch on Mainnet
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Bitcoin: More Than Just Digital Gold?
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Finding a Home for Labs
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Delphi Labs is Delphi’s protocol R&D arm, with a team of ~50 dedicated to building new Web 3 primitives. Previously, the team was focused on researching & developing protocols on Terra. In the wake of the Terra collapse, Delphi Labs was faced with a big decision regarding where to focus our builder efforts going forward.

Was Optimism's Airdrop a Success?
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ZK (Validity) Rollups: Entering the General Purpose Era
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While the privacy benefits of ZKPs are clear, the scaling benefits may be less so. So what is their purpose in blockchains?
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