251{
252    std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
253    if (!pwallet) return UniValue::VNULL;
254
255    if (pwallet->IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
256        throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED, "Error: wallet does not contain private keys, nothing to encrypt.");
257    }
258
259    if (pwallet->HasEncryptionKeys()) {
260        throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an encrypted wallet, but encryptwallet was called.");
261    }
262
263    if (pwallet->IsScanningWithPassphrase()) {
264        throw JSONRPCError(RPC_WALLET_ERROR, "Error: the wallet is currently being used to rescan the blockchain for related transactions. Please call `abortrescan` before encrypting the wallet.");
265    }
266
267    LOCK2(pwallet->m_relock_mutex, pwallet->cs_wallet);
268
269    SecureString strWalletPass;
270    strWalletPass.reserve(100);
271    strWalletPass = std::string_view{request.params[0].get_str()};
272
273    if (strWalletPass.empty()) {
274        throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase cannot be empty");
275    }
276
277    if (!pwallet->EncryptWallet(strWalletPass)) {
278        throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED, "Error: Failed to encrypt the wallet.");
279    }
280
281    return "wallet encrypted; The keypool has been flushed and a new HD seed was generated. You need to make a new backup with the backupwallet RPC.";
282},
283    };
284}
285} // namespace wallet
286