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zeekay
2c63fd34fc
Lens is the curve-based threshold signing kernel for Lux. It is the classical analogue of Pulsar (the lattice kernel at github.com/luxfi/pulsar). Both kernels share the same lifecycle shape — Bootstrap → Reshare* → Reanchor — and the same activation circuit-breaker contract. They differ only in the math field: Pulsar over R_q (Module-LWE), Lens over a prime-order curve group (discrete log). Curves shipped: Ed25519, secp256k1, Ristretto255. Each has a deterministically-derived secondary Pedersen generator H from a Lens-specific nothing-up-my-sleeve tag. Sign math: FROST 2-round Schnorr threshold signing per RFC 9591 (Komlo-Goldberg 2020). Verifier checks z·G ?= R + c·X under the unchanged group public key. Reshare math: HJKY97 zero-poly Refresh + Desmedt-Jajodia ReshareToNewSet over the curve scalar field. Master secret s is preserved; only the share distribution rotates per epoch. Activation cert message format: QUASAR-LENS-ACTIVATE-v1, byte-equivalent shape to QUASAR-PULSAR-ACTIVATE-v1. Hash suite: HashSuite interface with Lens-SHA3 (production, cSHAKE256 / KMAC256 / TupleHash256) and Lens-BLAKE3 (legacy) profiles. DKG: distributed FROST DKG with Feldman commitments. No trusted dealer required at genesis if the chain prefers proper distributed DKG. KAT oracles: cmd/reshare_oracle and cmd/dkg_oracle emit deterministic JSON vectors for cross-language byte-equality validation against a future luxcpp/crypto/lens/ port. Tests: full unit + integration coverage on every shipped curve. 60 unique tests, 0 failures.
44 lines
1.4 KiB
JSON
44 lines
1.4 KiB
JSON
{
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"curve": "secp256k1",
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"variant": "reshare",
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"seed": "lens.reshare.kat.v1",
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"t_old": 3,
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"t_new": 5,
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"old_set": [
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1,
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2,
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3,
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4,
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5
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],
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"new_set": [
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6,
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7,
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8,
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9,
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10
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],
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"old_shares_hex": {
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"1": "3f57ee1c87fc06cc18a6deb7ae43af48828c8bb2dcd85004ba98289b467e3fe7",
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"2": "51358d243302b34fa26525ab6b20674936dd9156256003e04916e048419ea5a4",
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"3": "9ea3d9e92905bc9e4cbfb02c217596fe77e4f3638f84cc377e0bd17b7cac1040",
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"4": "27a2d46b6a0522b817b67e39d1433e698af3d4f46bfe08ce99a49da827703e7a",
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"5": "ec327caaf600e59d03498fd47a895d87e567efd6195cfa1d1b8601e7e257b2d4"
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},
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"new_shares_hex": {
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"10": "fa233395a33615ba86a6b9131b3ae3d9342dcca8cf3fd41203f822e8d01fe09a",
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"6": "f34b43693c70aa95341d29c5d4e5e2c06e498c51f7c902e42967efc8987f3127",
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"7": "71560ce1325d9da789df6a468770bc98694c200a175cefe2ff67ee12baca9855",
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"8": "40736402d7d677f8beb390ec3e0978d03744f9dc272d63960744e6ebc4a46b08",
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"9": "03db68fc791282e9a9d74bb07dcee526cd9aa5ffa06d0087092620751a10ae4b"
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},
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"recovered_secret_hex": "690afcd227f1b713af84db50eadf6efc5af1e279b5edb0a4d28faa748b4adf09",
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"notes": {
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"curve_legal_values": "ed25519, secp256k1, ristretto255",
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"deterministic_rng": "blake3-keyed",
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"format_version": "1.0",
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"intended_consumer": "luxcpp/crypto/lens/reshare cross-port byte-equal validation",
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"variant_legal_values": "reshare, refresh"
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}
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}
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