Function discoverEncryptionKeyFromMessages

discoverEncryptionKeyFromMessages(
    indexer: IndexerClient,
    address: string,
    isChatMessage: (note: Uint8Array) => boolean,
    decodeEnvelope: (note: Uint8Array) => { senderPublicKey: Uint8Array },
    optionsOrDepth?: number | DiscoverKeyOptions,
): Promise<DiscoveredKey | undefined>
Discover encryption key from a chat message transaction.

Extracts the sender's public key from the envelope header of any AlgoChat message they've sent.

When the indexer supports paginated search, this iterates through the full transaction history page by page. Otherwise it falls back to a single batch.
Parameters
- indexer: IndexerClient
  The indexer client to use
- address: string
  The Algorand address to find the key for
- isChatMessage: (note: Uint8Array) => boolean
  Function to check if a note is an AlgoChat message
- decodeEnvelope: (note: Uint8Array) => { senderPublicKey: Uint8Array }
  Function to decode envelope and extract public key
- OptionaloptionsOrDepth: number | DiscoverKeyOptions
  Discovery options, or a numeric search depth for backward compatibility
Returns Promise<DiscoveredKey | undefined>
DiscoveredKey if found, undefined otherwise
- Defined in src/blockchain/discovery.ts:217