import { type KeyObject } from "node:crypto";
export interface SubgroupResult {
    group: string;
    nA: number;
    nB: number;
    effect: number;
    lowerBound: number;
    upperBound: number;
    status: "IMPROVED" | "HARMED" | "UNCERTAIN";
}
export interface SubgroupCertificate {
    standard: "melete-subgroup-certificate/v1";
    verdict: "UNIFORM-IMPROVEMENT" | "HARMED-SUBGROUP" | "MIXED";
    groups: number;
    alpha: number;
    overallEffect: number;
    overallLowerBound: number;
    overallSignificant: boolean;
    overallMisleading: boolean;
    worstGroup: string;
    worstEffect: number;
    subgroups: Array<SubgroupResult & {
        samplesA: number[];
        samplesB: number[];
    }>;
    payloadHash: string;
    signature: string;
    publicKeyPem: string;
    algo: "ed25519+sha256";
}
export declare function subgroupCertificate(opts: {
    contributions: Array<{
        group: string;
        samplesA: number[];
        samplesB: number[];
    }>;
    alpha?: number;
    keys?: {
        publicKey: KeyObject;
        privateKey: KeyObject;
    };
}): SubgroupCertificate;
export declare function verifySubgroupCertificate(c: SubgroupCertificate): {
    ok: boolean;
    reason: string;
};
export declare function subgroupGauntlet(): {
    score: 0 | 100;
    checks: Array<{
        name: string;
        pass: boolean;
        detail: string;
    }>;
};
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