Robin Linus Introduces BitVM-448 for Covenant-Based Bridges
Robin Linus introduces BitVM-448, a covenant-based BitVM3 bridge design using OP_TEMPLATEHASH to enable non-interactive deposits and simplify assertion bonds, addressing key limitations of current BitVM3 bridges.
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BitVM-448: Covenant-Based BitVM3 Bridges
This note sketches BitVM-448, a BIP-448-based BitVM3 bridge using OP_TEMPLATEHASH covenants and OP_CHECKSIGFROMSTACK for deleted-key recursion. Native template covenants replace per-deposit pre-signed transactions, removing the per-deposit cosigner set from bridge safety and allowing non-interactive deposits into prepared slots. The operator's per-attempt bond is moved into the asserted UTXO, so an invalid assertion can return the reserve to the bridge while burning the bond, without a sibling-input covenant.