ElizaOS External Key Custody Interface (wallet/external-key-custody.ts)

Defines types and validation for external wallet key custody providers supporting import, signing, and export across chain families.

// Source: https://github.com/elizaOS/eliza | License: MIT | Copyright 2026 Shaw Walters and elizaOS Contributors
// Provided via justclaw.it.com; keep this notice with the code.
import type { ChainFamily } from "../shared/index.ts";

export type ExternalKeySigningAvailability =
  | "not-supported"
  | "provider-signing";

/** Public compatibility marker for operator-supplied custody providers. */
export const EXTERNAL_KEY_CUSTODY_CONTRACT_VERSION = 1 as const;

export interface ExternalKeyHandleDescriptor {
  providerId: string;
  keyId: string;
  version?: string;
  region?: string;
  metadata?: Record<string, unknown>;
}

export interface ExternalKeyHandleImportRequest {
  tenantId: string;
  agentId: string;
  chainFamily: ChainFamily;
  address: string;
  handle: ExternalKeyHandleDesc

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