import { PublicKey } from "@chainsafe/blst";
import { Root } from "@lodestar/types";
import { Index2PubkeyCache } from "../cache/pubkeyCache.js";
export declare enum SignatureSetType {
    single = "single",
    aggregate = "aggregate",
    /**
     * Single signature with validator index instead of pubkey.
     * Pubkey lookup is deferred to verification time.
     */
    indexed = "indexed"
}
/**
 * Single signature with pubkey directly.
 * Used when pubkey comes from the message itself (e.g. BLS to execution change).
 */
export type SingleSignatureSet = {
    type: SignatureSetType.single;
    pubkey: PublicKey;
    signingRoot: Root;
    signature: Uint8Array;
};
/**
 * Single signature with validator index.
 * Pubkey is looked up at verification time.
 */
export type IndexedSignatureSet = {
    type: SignatureSetType.indexed;
    index: number;
    signingRoot: Root;
    signature: Uint8Array;
};
/**
 * Aggregate signature with validator indices.
 * Pubkeys are looked up and aggregated at verification time.
 */
export type AggregatedSignatureSet = {
    type: SignatureSetType.aggregate;
    indices: number[];
    signingRoot: Root;
    signature: Uint8Array;
};
export type ISignatureSet = SingleSignatureSet | IndexedSignatureSet | AggregatedSignatureSet;
/**
 * Get the pubkey for a signature set, performing aggregation if necessary.
 * Requires index2pubkey cache for indexed and aggregate sets.
 */
export declare function getSignatureSetPubkey(signatureSet: ISignatureSet, index2pubkey: Index2PubkeyCache): PublicKey;
export declare function verifySignatureSet(signatureSet: SingleSignatureSet, index2pubkey?: Index2PubkeyCache): boolean;
export declare function verifySignatureSet(signatureSet: IndexedSignatureSet, index2pubkey: Index2PubkeyCache): boolean;
export declare function verifySignatureSet(signatureSet: AggregatedSignatureSet, index2pubkey: Index2PubkeyCache): boolean;
export declare function verifySignatureSet(signatureSet: ISignatureSet, index2pubkey: Index2PubkeyCache): boolean;
export declare function createSingleSignatureSetFromComponents(pubkey: PublicKey, signingRoot: Root, signature: Uint8Array): SingleSignatureSet;
export declare function createIndexedSignatureSetFromComponents(index: number, signingRoot: Root, signature: Uint8Array): IndexedSignatureSet;
export declare function createAggregateSignatureSetFromComponents(indices: number[], signingRoot: Root, signature: Uint8Array): AggregatedSignatureSet;
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