import { Descriptor } from '@bitgo/wasm-utxo';
/**
 * Get a descriptor at a specific derivation index.
 * For wildcard descriptors (containing '*'), the index is required and used for derivation.
 * For definite descriptors (not containing '*'), no index should be provided.
 * @param descriptor - The descriptor to derive from
 * @param index - The derivation index for wildcard descriptors
 * @returns A new descriptor at the specified index for wildcard descriptors, or the original descriptor for definite ones
 * @throws {Error} If index is undefined for a wildcard descriptor or if index is provided for a definite descriptor
 */
export declare function getDescriptorAtIndex(descriptor: Descriptor, index: number | undefined): Descriptor;
export declare function getDescriptorAtIndexCheckScript(descriptor: Descriptor, index: number | undefined, script: Buffer, descriptorString?: string): Descriptor;
//# sourceMappingURL=derive.d.ts.map