feat: 2-of-3 threshold ECDSA signing (CGGMP21)#14

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Slymeofthemonth:slymebot/threshold-signing

Commits on Feb 15, 2026

docs: add threshold signing protocol spec
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scaffold: add saw-mpc, saw-policy, saw-cosigner crates
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fix: correct hd-wallet feature name for cggmp21
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feat: implement cggmp21 keygen + signing with passing integration test
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docs: update spec with 3-mode deployment strategy
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docs: add threat model and design rationale for threshold signing
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feat: WebSocket transport for MPC signing
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feat: wire threshold signing into saw-daemon and saw-policy
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feat: hook threshold signing into saw-daemon request loop
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feat: threshold path for EIP-2612 permits + get_address
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feat: keygen ceremony CLI with relay server
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feat: key share encryption at rest (Argon2id + ChaCha20-Poly1305)
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feat: presignature pool with background refill + fast path signing
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feat: persistent WS connection for fast-path threshold signing
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perf: optimize crypto deps in dev profile for faster MPC tests
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feat: add 'saw keygen-local' for local 2-of-3 threshold key generation
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Commits on Feb 16, 2026