/**
 * Legacy APS self-certifying identifier support. New PassportV2 issuance uses
 * did:key by default; this parser exists so previously emitted did:aps values
 * remain verifiable without implying that their identifier survives rotation.
 */
export declare function legacyDidApsFromPublicKey(publicKeyHex: string): string;
export declare function publicKeyFromLegacyDidAps(did: string): string;
export declare function publicKeyFromDidKey(did: string): string;
export declare function didKeyFromPublicKey(publicKeyHex: string): string;
export declare function selfCertifyingPublicKey(did: string): string | null;
export declare function defaultVerificationMethod(agentId: string): string;
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