import type { RequestSignerConfig } from "../core/types.js";
/**
 * Generates `Web3Signed` authorization headers for protocol requests.
 *
 * @see {@link createRequestSigner} to create an instance.
 */
export interface RequestSigner {
    /**
     * Signs a request and returns the `Authorization` header value.
     *
     * @param params - Request metadata (audience, method, URI, optional body and grantId).
     * @returns A `Web3Signed <payload>.<signature>` header string.
     */
    signRequest(params: {
        aud: string;
        method: string;
        uri: string;
        body?: string;
        grantId?: string;
    }): Promise<string>;
    /** The wallet address derived from the private key. */
    readonly address: `0x${string}`;
}
/**
 * Creates a request signer that generates `Web3Signed` authorization headers.
 *
 * @param config - Configuration containing the builder's private key.
 * @returns A {@link RequestSigner} instance.
 */
export declare function createRequestSigner(config: RequestSignerConfig): RequestSigner;
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