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zeekay
3fbffaa4f1
New package wires luxfi/mpc/{cc/attest, pkg/kms, pkg/hsm, pkg/approval}
into a Signer whose output is byte-identical to single-party FIPS 205
SLH-DSA SignDeterministic. The master seed lives sealed-at-rest in
hsm.Provider and is only ever unwrapped after:
* approval.ApprovalProvider.ApproveIntent (out-of-band executive gate)
* kms.ReleaseGate.Issue + Release (RIM + hardware allowlist, single-use
nonce, cc/attest chain verify of the SEV-SNP / TDX / NRAS quote)
* hsm.Provider.GetKey returns the wrapped seed inside the attested TEE
Composition (not inheritance):
Signer struct { gate kms.ReleaseGate; hsmP hsm.Provider;
appr approval.ApprovalProvider; cfg Config }
Permissionless paths (magnetar.ValidatorSign, magnetar.Combine THBS-SE)
are UNAFFECTED. This is the opt-in institutional-custody extension
binding key release to verifiable hardware attestation. Use cases:
M-Chain bridge custody, A-Chain confidential-compute oracle.
Test surface drives the full chain end-to-end with the same committed
AMD Milan SEV-SNP fixtures the cc/attest verifier_test uses (1184 B
report + 1360 B VCEK). 9 tests + 6 Config sub-tests; t.Parallel + a
package TestMain that exports MPC_LOCAL_APPROVAL=true.