import type { DID } from 'dids';
import type { CommitData } from '../index.js';
import type { StreamID } from '@dustil/streamid';
export declare class SignatureUtils {
    static verifyCommitSignature(commitData: CommitData, did: DID, controller: string, model: StreamID | null, streamId: StreamID): Promise<void>;
    private static _verifyCapabilityAuthz;
}
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