/**
 * @param {import('@ipld/dag-ucan').DID} did
 */
export function pubkeyBytesFromDID(did: import('@ipld/dag-ucan').DID): Promise<Uint8Array>;
/**
 * @typedef {import('./types.js').KeyExchangeKeypair} SharedKey
 * @implements {SharedKey}
 */
export class EcdhKeypair implements SharedKey {
    static ecdhKey(): Promise<{
        keypair: CryptoKeyPair;
        did: `did:${string}:${string}`;
    }>;
    static create(): Promise<EcdhKeypair>;
    /**
     * @param {CryptoKeyPair} keypair
     * @param {import('@ipld/dag-ucan').DID} did
     */
    constructor(keypair: CryptoKeyPair, did: import('@ipld/dag-ucan').DID);
    did: `did:${string}:${string}`;
    pubkey(): Promise<Uint8Array>;
    /**
     * @param {import('@ipld/dag-ucan').DID} otherDid
     */
    deriveSharedKey(otherDid: import('@ipld/dag-ucan').DID): Promise<AesKey>;
    /**
     * returns base64 encrypted data with iv prepended
     *
     * @param {string} data
     * @param {import('@ipld/dag-ucan').DID} otherDid
     */
    encryptForDid(data: string, otherDid: import('@ipld/dag-ucan').DID): Promise<string>;
    decryptFromDid(data: string, otherDID: `did:${string}:${string}`): Promise<string>;
    #private;
}
export type SharedKey = import('./types.js').KeyExchangeKeypair;
import { AesKey } from './aes-key.js';
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