c-libp2p/include/libp2p/peer/providerstore.h

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#pragma once
#include "libp2p/db/datastore.h"
#include "libp2p/peer/peer.h"
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/**
* Contains a hash and the peer id of
* who can provide it
*/
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struct ProviderEntry {
unsigned char* hash;
int hash_size;
unsigned char* peer_id;
int peer_id_size;
};
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/***
* A structure to store providers. The implementation
* is a vector of ProviderEntry structures, which contain
* the hash and peer id.
*/
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struct ProviderStore {
struct Libp2pVector* provider_entries;
// this is requred so we can look locally for requests
const struct Datastore* datastore;
const struct Libp2pPeer* local_peer;
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};
/**
* Create a new ProviderStore
* @returns a ProviderStore struct
*/
struct ProviderStore* libp2p_providerstore_new(const struct Datastore* datastore, const struct Libp2pPeer* local_peer);
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/***
* Clean resources used by a ProviderStore
* @param in the ProviderStore to clean up
*/
void libp2p_providerstore_free(struct ProviderStore* in);
int libp2p_providerstore_add(struct ProviderStore* store, const unsigned char* hash, int hash_size, const unsigned char* peer_id, int peer_id_size);
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int libp2p_providerstore_get(struct ProviderStore* store, const unsigned char* hash, int hash_size, unsigned char** peer_id, int *peer_id_size);