import type * as Keystore from '../Keystore.js';
/**
 * Pure-JS secp256k1 keystore. The private key is held as hex in the handle
 * and signing runs in JavaScript — at-rest protection is the host app's
 * storage adapter, and the key is readable by anything with JS execution.
 * Opt into it via `keyType: 'secp256k1'`; secp256k1 signatures are the
 * chain's cheapest envelope.
 */
export declare function secp256k1(): Keystore.Keystore;
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