/tmp/bitcoin/src/wallet/rpc/encrypt.cpp

Source
// Copyright (c) 2011-present The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <rpc/util.h>
#include <scheduler.h>
#include <wallet/context.h>
#include <wallet/rpc/util.h>
#include <wallet/wallet.h>


namespace wallet {
RPCMethod walletpassphrase()
{
    return RPCMethod{
        "walletpassphrase",
        "Stores the wallet decryption key in memory for 'timeout' seconds.\n"
                "This is needed prior to performing transactions related to private keys such as sending bitcoins\n"
            "\nNote:\n"
            "Issuing the walletpassphrase command while the wallet is already unlocked will set a new unlock\n"
            "time that overrides the old one.\n",
                {
                    {"passphrase", RPCArg::Type::STR, RPCArg::Optional::NO, "The wallet passphrase"},
                    {"timeout", RPCArg::Type::NUM, RPCArg::Optional::NO, "The time to keep the decryption key in seconds; capped at 100000000 (~3 years)."},
                },
                RPCResult{RPCResult::Type::NONE, "", ""},
                RPCExamples{
            "\nUnlock the wallet for 60 seconds\n"
            + HelpExampleCli("walletpassphrase", "\"my pass phrase\" 60") +
            "\nLock the wallet again (before 60 seconds)\n"
            + HelpExampleCli("walletlock", "") +
            "\nAs a JSON-RPC call\n"
            + HelpExampleRpc("walletpassphrase", "\"my pass phrase\", 60")
                },
        [](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
{
    std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
    if (!wallet) return UniValue::VNULL;
    CWallet* const pwallet = wallet.get();

    int64_t nSleepTime;
    int64_t relock_time;
    // Prevent concurrent calls to walletpassphrase with the same wallet.
    LOCK(pwallet->m_unlock_mutex);
    {
        LOCK(pwallet->cs_wallet);

        if (!pwallet->HasEncryptionKeys()) {
            throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletpassphrase was called.");
        }

        // Note that the walletpassphrase is stored in request.params[0] which is not mlock()ed
        SecureString strWalletPass;
        strWalletPass.reserve(100);
        strWalletPass = std::string_view{request.params[0].get_str()};

        // Get the timeout
        nSleepTime = request.params[1].getInt<int64_t>();
        // Timeout cannot be negative, otherwise it will relock immediately
        if (nSleepTime < 0) {
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Timeout cannot be negative.");
        }
        // Clamp timeout to ~3 years to avoid overflow when computing the relock time
        constexpr int64_t MAX_SLEEP_TIME = 100000000;
        if (nSleepTime > MAX_SLEEP_TIME) {
            nSleepTime = MAX_SLEEP_TIME;
        }

        if (strWalletPass.empty()) {
            throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase cannot be empty");
        }

        if (!pwallet->Unlock(strWalletPass)) {
            // Check if the passphrase has a null character (see #27067 for details)
            if (strWalletPass.find('\0') == std::string::npos) {
                throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
            } else {
                throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered is incorrect. "
                                                                    "It contains a null character (ie - a zero byte). "
                                                                    "If the passphrase was set with a version of this software prior to 25.0, "
                                                                    "please try again with only the characters up to — but not including — "
                                                                    "the first null character. If this is successful, please set a new "
                                                                    "passphrase to avoid this issue in the future.");
            }
        }

        pwallet->TopUpKeyPool();

        pwallet->nRelockTime = GetTime() + nSleepTime;
        relock_time = pwallet->nRelockTime;
    }

    // Get wallet scheduler to queue up the relock callback in the future.
    // Scheduled events don't get destructed until they are executed,
    // and they are executed in series in a single scheduler thread so
    // no cs_wallet lock is needed.
    WalletContext& context = EnsureWalletContext(request.context);
    // Keep a weak pointer to the wallet so that it is possible to unload the
    // wallet before the following callback is called. If a valid shared pointer
    // is acquired in the callback then the wallet is still loaded.
    std::weak_ptr<CWallet> weak_wallet = wallet;
    context.scheduler->scheduleFromNow([weak_wallet, relock_time] {
        if (auto shared_wallet = weak_wallet.lock()) {
            LOCK2(shared_wallet->m_relock_mutex, shared_wallet->cs_wallet);
            // Skip if this is not the most recent relock callback.
            if (shared_wallet->nRelockTime != relock_time) return;
            shared_wallet->Lock();
            shared_wallet->nRelockTime = 0;
        }
    }, std::chrono::seconds(nSleepTime));

    return UniValue::VNULL;
},
    };
}


RPCMethod walletpassphrasechange()
{
    return RPCMethod{
        "walletpassphrasechange",
        "Changes the wallet passphrase from 'oldpassphrase' to 'newpassphrase'.\n",
                {
                    {"oldpassphrase", RPCArg::Type::STR, RPCArg::Optional::NO, "The current passphrase"},
                    {"newpassphrase", RPCArg::Type::STR, RPCArg::Optional::NO, "The new passphrase"},
                },
                RPCResult{RPCResult::Type::NONE, "", ""},
                RPCExamples{
                    HelpExampleCli("walletpassphrasechange", "\"old one\" \"new one\"")
            + HelpExampleRpc("walletpassphrasechange", "\"old one\", \"new one\"")
                },
        [](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
{
    std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
    if (!pwallet) return UniValue::VNULL;

    if (!pwallet->HasEncryptionKeys()) {
        throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletpassphrasechange was called.");
    }

    if (pwallet->IsScanningWithPassphrase()) {
        throw JSONRPCError(RPC_WALLET_ERROR, "Error: the wallet is currently being used to rescan the blockchain for related transactions. Please call `abortrescan` before changing the passphrase.");
    }

    LOCK2(pwallet->m_relock_mutex, pwallet->cs_wallet);

    SecureString strOldWalletPass;
    strOldWalletPass.reserve(100);
    strOldWalletPass = std::string_view{request.params[0].get_str()};

    SecureString strNewWalletPass;
    strNewWalletPass.reserve(100);
    strNewWalletPass = std::string_view{request.params[1].get_str()};

    if (strOldWalletPass.empty() || strNewWalletPass.empty()) {
        throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase cannot be empty");
    }

    if (!pwallet->ChangeWalletPassphrase(strOldWalletPass, strNewWalletPass)) {
        // Check if the old passphrase had a null character (see #27067 for details)
        if (strOldWalletPass.find('\0') == std::string::npos) {
            throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
        } else {
            throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The old wallet passphrase entered is incorrect. "
                                                                "It contains a null character (ie - a zero byte). "
                                                                "If the old passphrase was set with a version of this software prior to 25.0, "
                                                                "please try again with only the characters up to — but not including — "
                                                                "the first null character.");
        }
    }

    return UniValue::VNULL;
},
    };
}


RPCMethod walletlock()
{
    return RPCMethod{
        "walletlock",
        "Removes the wallet encryption key from memory, locking the wallet.\n"
                "After calling this method, you will need to call walletpassphrase again\n"
                "before being able to call any methods which require the wallet to be unlocked.\n",
                {},
                RPCResult{RPCResult::Type::NONE, "", ""},
                RPCExamples{
            "\nSet the passphrase for 2 minutes to perform a transaction\n"
            + HelpExampleCli("walletpassphrase", "\"my pass phrase\" 120") +
            "\nPerform a send (requires passphrase set)\n"
            + HelpExampleCli("sendtoaddress", "\"" + EXAMPLE_ADDRESS[0] + "\" 1.0") +
            "\nClear the passphrase since we are done before 2 minutes is up\n"
            + HelpExampleCli("walletlock", "") +
            "\nAs a JSON-RPC call\n"
            + HelpExampleRpc("walletlock", "")
                },
        [](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
{
    std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
    if (!pwallet) return UniValue::VNULL;

    if (!pwallet->HasEncryptionKeys()) {
        throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletlock was called.");
    }

    if (pwallet->IsScanningWithPassphrase()) {
        throw JSONRPCError(RPC_WALLET_ERROR, "Error: the wallet is currently being used to rescan the blockchain for related transactions. Please call `abortrescan` before locking the wallet.");
    }

    LOCK2(pwallet->m_relock_mutex, pwallet->cs_wallet);

    pwallet->Lock();
    pwallet->nRelockTime = 0;

    return UniValue::VNULL;
},
    };
}


RPCMethod encryptwallet()
{
    return RPCMethod{
        "encryptwallet",
        "Encrypts the wallet with 'passphrase'. This is for first time encryption.\n"
        "After this, any calls that interact with private keys such as sending or signing \n"
        "will require the passphrase to be set prior to making these calls.\n"
                "Use the walletpassphrase call for this, and then walletlock call.\n"
                "If the wallet is already encrypted, use the walletpassphrasechange call.\n"
                "** IMPORTANT **\n"
                "For security reasons, the encryption process will generate a new HD seed, resulting\n"
                "in the creation of a fresh set of active descriptors. Therefore, it is crucial to\n"
                "securely back up the newly generated wallet file using the backupwallet RPC.\n",
                {
                    {"passphrase", RPCArg::Type::STR, RPCArg::Optional::NO, "The pass phrase to encrypt the wallet with. It must be at least 1 character, but should be long."},
                },
                RPCResult{RPCResult::Type::STR, "", "A string with further instructions"},
                RPCExamples{
            "\nEncrypt your wallet\n"
            + HelpExampleCli("encryptwallet", "\"my pass phrase\"") +
            "\nNow set the passphrase to use the wallet, such as for signing or sending bitcoin\n"
            + HelpExampleCli("walletpassphrase", "\"my pass phrase\"") +
            "\nNow we can do something like sign\n"
            + HelpExampleCli("signmessage", "\"address\" \"test message\"") +
            "\nNow lock the wallet again by removing the passphrase\n"
            + HelpExampleCli("walletlock", "") +
            "\nAs a JSON-RPC call\n"
            + HelpExampleRpc("encryptwallet", "\"my pass phrase\"")
                },
        [](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
{
    std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
    if (!pwallet) return UniValue::VNULL;

    if (pwallet->IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
        throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED, "Error: wallet does not contain private keys, nothing to encrypt.");
    }

    if (pwallet->HasEncryptionKeys()) {
        throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an encrypted wallet, but encryptwallet was called.");
    }

    if (pwallet->IsScanningWithPassphrase()) {
        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.");
    }

    LOCK2(pwallet->m_relock_mutex, pwallet->cs_wallet);

    SecureString strWalletPass;
    strWalletPass.reserve(100);
    strWalletPass = std::string_view{request.params[0].get_str()};

    if (strWalletPass.empty()) {
        throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase cannot be empty");
    }

    if (!pwallet->EncryptWallet(strWalletPass)) {
        throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED, "Error: Failed to encrypt the wallet.");
    }

    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.";
},
    };
}
} // namespace wallet

Coverage Report

Created: 2026-08-14 20:23

Line	Count	Source
1		// Copyright (c) 2011-present The Bitcoin Core developers
2		// Distributed under the MIT software license, see the accompanying
3		// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5		#include <rpc/util.h>
6		#include <scheduler.h>
7		#include <wallet/context.h>
8		#include <wallet/rpc/util.h>
9		#include <wallet/wallet.h>
10
11
12		namespace wallet {
13		RPCMethod walletpassphrase()
14	888	{
15	888	return RPCMethod{
16	888	"walletpassphrase",
17	888	"Stores the wallet decryption key in memory for 'timeout' seconds.\n"
18	888	"This is needed prior to performing transactions related to private keys such as sending bitcoins\n"
19	888	"\nNote:\n"
20	888	"Issuing the walletpassphrase command while the wallet is already unlocked will set a new unlock\n"
21	888	"time that overrides the old one.\n",
22	888	{
23	888	{"passphrase", RPCArg::Type::STR, RPCArg::Optional::NO, "The wallet passphrase"},
24	888	{"timeout", RPCArg::Type::NUM, RPCArg::Optional::NO, "The time to keep the decryption key in seconds; capped at 100000000 (~3 years)."},
25	888	},
26	888	RPCResult{RPCResult::Type::NONE, "", ""},
27	888	RPCExamples{
28	888	"\nUnlock the wallet for 60 seconds\n"
29	888	+ HelpExampleCli("walletpassphrase", "\"my pass phrase\" 60") +
30	888	"\nLock the wallet again (before 60 seconds)\n"
31	888	+ HelpExampleCli("walletlock", "") +
32	888	"\nAs a JSON-RPC call\n"
33	888	+ HelpExampleRpc("walletpassphrase", "\"my pass phrase\", 60")
34	888	},
35	888	[](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
36	888	{
37	57	std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
38	57	if (!wallet) return UniValue::VNULL;
39	57	CWallet* const pwallet = wallet.get();
40
41	57	int64_t nSleepTime;
42	57	int64_t relock_time;
43		// Prevent concurrent calls to walletpassphrase with the same wallet.
44	57	LOCK(pwallet->m_unlock_mutex);
45	57	{
46	57	LOCK(pwallet->cs_wallet);
47
48	57	if (!pwallet->HasEncryptionKeys()) {
49	6	throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletpassphrase was called.");
50	6	}
51
52		// Note that the walletpassphrase is stored in request.params[0] which is not mlock()ed
53	51	SecureString strWalletPass;
54	51	strWalletPass.reserve(100);
55	51	strWalletPass = std::string_view{request.params[0].get_str()};
56
57		// Get the timeout
58	51	nSleepTime = request.params[1].getInt<int64_t>();
59		// Timeout cannot be negative, otherwise it will relock immediately
60	51	if (nSleepTime < 0) {
61	1	throw JSONRPCError(RPC_INVALID_PARAMETER, "Timeout cannot be negative.");
62	1	}
63		// Clamp timeout to ~3 years to avoid overflow when computing the relock time
64	50	constexpr int64_t MAX_SLEEP_TIME = 100000000;
65	50	if (nSleepTime > MAX_SLEEP_TIME) {
66	1	nSleepTime = MAX_SLEEP_TIME;
67	1	}
68
69	50	if (strWalletPass.empty()) {
70	1	throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase cannot be empty");
71	1	}
72
73	49	if (!pwallet->Unlock(strWalletPass)) {
74		// Check if the passphrase has a null character (see #27067 for details)
75	4	if (strWalletPass.find('\0') == std::string::npos) {
76	3	throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
77	3	} else {
78	1	throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered is incorrect. "
79	1	"It contains a null character (ie - a zero byte). "
80	1	"If the passphrase was set with a version of this software prior to 25.0, "
81	1	"please try again with only the characters up to — but not including — "
82	1	"the first null character. If this is successful, please set a new "
83	1	"passphrase to avoid this issue in the future.");
84	1	}
85	4	}
86
87	45	pwallet->TopUpKeyPool();
88
89	45	pwallet->nRelockTime = GetTime() + nSleepTime;
90	45	relock_time = pwallet->nRelockTime;
91	45	}
92
93		// Get wallet scheduler to queue up the relock callback in the future.
94		// Scheduled events don't get destructed until they are executed,
95		// and they are executed in series in a single scheduler thread so
96		// no cs_wallet lock is needed.
97	0	WalletContext& context = EnsureWalletContext(request.context);
98		// Keep a weak pointer to the wallet so that it is possible to unload the
99		// wallet before the following callback is called. If a valid shared pointer
100		// is acquired in the callback then the wallet is still loaded.
101	45	std::weak_ptr<CWallet> weak_wallet = wallet;
102	45	context.scheduler->scheduleFromNow([weak_wallet, relock_time] {
103	5	if (auto shared_wallet = weak_wallet.lock()) {
104	3	LOCK2(shared_wallet->m_relock_mutex, shared_wallet->cs_wallet);
105		// Skip if this is not the most recent relock callback.
106	3	if (shared_wallet->nRelockTime != relock_time) return;
107	3	shared_wallet->Lock();
108	3	shared_wallet->nRelockTime = 0;
109	3	}
110	5	}, std::chrono::seconds(nSleepTime));
111
112	45	return UniValue::VNULL;
113	49	},
114	888	};
115	888	}
116
117
118		RPCMethod walletpassphrasechange()
119	838	{
120	838	return RPCMethod{
121	838	"walletpassphrasechange",
122	838	"Changes the wallet passphrase from 'oldpassphrase' to 'newpassphrase'.\n",
123	838	{
124	838	{"oldpassphrase", RPCArg::Type::STR, RPCArg::Optional::NO, "The current passphrase"},
125	838	{"newpassphrase", RPCArg::Type::STR, RPCArg::Optional::NO, "The new passphrase"},
126	838	},
127	838	RPCResult{RPCResult::Type::NONE, "", ""},
128	838	RPCExamples{
129	838	HelpExampleCli("walletpassphrasechange", "\"old one\" \"new one\"")
130	838	+ HelpExampleRpc("walletpassphrasechange", "\"old one\", \"new one\"")
131	838	},
132	838	[](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
133	838	{
134	7	std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
135	7	if (!pwallet) return UniValue::VNULL;
136
137	7	if (!pwallet->HasEncryptionKeys()) {
138	1	throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletpassphrasechange was called.");
139	1	}
140
141	6	if (pwallet->IsScanningWithPassphrase()) {
142	1	throw JSONRPCError(RPC_WALLET_ERROR, "Error: the wallet is currently being used to rescan the blockchain for related transactions. Please call `abortrescan` before changing the passphrase.");
143	1	}
144
145	5	LOCK2(pwallet->m_relock_mutex, pwallet->cs_wallet);
146
147	5	SecureString strOldWalletPass;
148	5	strOldWalletPass.reserve(100);
149	5	strOldWalletPass = std::string_view{request.params[0].get_str()};
150
151	5	SecureString strNewWalletPass;
152	5	strNewWalletPass.reserve(100);
153	5	strNewWalletPass = std::string_view{request.params[1].get_str()};
154
155	5	if (strOldWalletPass.empty() \|\| strNewWalletPass.empty()) {
156	1	throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase cannot be empty");
157	1	}
158
159	4	if (!pwallet->ChangeWalletPassphrase(strOldWalletPass, strNewWalletPass)) {
160		// Check if the old passphrase had a null character (see #27067 for details)
161	2	if (strOldWalletPass.find('\0') == std::string::npos) {
162	1	throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The wallet passphrase entered was incorrect.");
163	1	} else {
164	1	throw JSONRPCError(RPC_WALLET_PASSPHRASE_INCORRECT, "Error: The old wallet passphrase entered is incorrect. "
165	1	"It contains a null character (ie - a zero byte). "
166	1	"If the old passphrase was set with a version of this software prior to 25.0, "
167	1	"please try again with only the characters up to — but not including — "
168	1	"the first null character.");
169	1	}
170	2	}
171
172	2	return UniValue::VNULL;
173	4	},
174	838	};
175	838	}
176
177
178		RPCMethod walletlock()
179	856	{
180	856	return RPCMethod{
181	856	"walletlock",
182	856	"Removes the wallet encryption key from memory, locking the wallet.\n"
183	856	"After calling this method, you will need to call walletpassphrase again\n"
184	856	"before being able to call any methods which require the wallet to be unlocked.\n",
185	856	{},
186	856	RPCResult{RPCResult::Type::NONE, "", ""},
187	856	RPCExamples{
188	856	"\nSet the passphrase for 2 minutes to perform a transaction\n"
189	856	+ HelpExampleCli("walletpassphrase", "\"my pass phrase\" 120") +
190	856	"\nPerform a send (requires passphrase set)\n"
191	856	+ HelpExampleCli("sendtoaddress", "\"" + EXAMPLE_ADDRESS[0] + "\" 1.0") +
192	856	"\nClear the passphrase since we are done before 2 minutes is up\n"
193	856	+ HelpExampleCli("walletlock", "") +
194	856	"\nAs a JSON-RPC call\n"
195	856	+ HelpExampleRpc("walletlock", "")
196	856	},
197	856	[](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
198	856	{
199	25	std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
200	25	if (!pwallet) return UniValue::VNULL;
201
202	25	if (!pwallet->HasEncryptionKeys()) {
203	0	throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an unencrypted wallet, but walletlock was called.");
204	0	}
205
206	25	if (pwallet->IsScanningWithPassphrase()) {
207	1	throw JSONRPCError(RPC_WALLET_ERROR, "Error: the wallet is currently being used to rescan the blockchain for related transactions. Please call `abortrescan` before locking the wallet.");
208	1	}
209
210	24	LOCK2(pwallet->m_relock_mutex, pwallet->cs_wallet);
211
212	24	pwallet->Lock();
213	24	pwallet->nRelockTime = 0;
214
215	24	return UniValue::VNULL;
216	25	},
217	856	};
218	856	}
219
220
221		RPCMethod encryptwallet()
222	852	{
223	852	return RPCMethod{
224	852	"encryptwallet",
225	852	"Encrypts the wallet with 'passphrase'. This is for first time encryption.\n"
226	852	"After this, any calls that interact with private keys such as sending or signing \n"
227	852	"will require the passphrase to be set prior to making these calls.\n"
228	852	"Use the walletpassphrase call for this, and then walletlock call.\n"
229	852	"If the wallet is already encrypted, use the walletpassphrasechange call.\n"
230	852	" IMPORTANT \n"
231	852	"For security reasons, the encryption process will generate a new HD seed, resulting\n"
232	852	"in the creation of a fresh set of active descriptors. Therefore, it is crucial to\n"
233	852	"securely back up the newly generated wallet file using the backupwallet RPC.\n",
234	852	{
235	852	{"passphrase", RPCArg::Type::STR, RPCArg::Optional::NO, "The pass phrase to encrypt the wallet with. It must be at least 1 character, but should be long."},
236	852	},
237	852	RPCResult{RPCResult::Type::STR, "", "A string with further instructions"},
238	852	RPCExamples{
239	852	"\nEncrypt your wallet\n"
240	852	+ HelpExampleCli("encryptwallet", "\"my pass phrase\"") +
241	852	"\nNow set the passphrase to use the wallet, such as for signing or sending bitcoin\n"
242	852	+ HelpExampleCli("walletpassphrase", "\"my pass phrase\"") +
243	852	"\nNow we can do something like sign\n"
244	852	+ HelpExampleCli("signmessage", "\"address\" \"test message\"") +
245	852	"\nNow lock the wallet again by removing the passphrase\n"
246	852	+ HelpExampleCli("walletlock", "") +
247	852	"\nAs a JSON-RPC call\n"
248	852	+ HelpExampleRpc("encryptwallet", "\"my pass phrase\"")
249	852	},
250	852	[](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
251	852	{
252	21	std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
253	21	if (!pwallet) return UniValue::VNULL;
254
255	21	if (pwallet->IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
256	3	throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED, "Error: wallet does not contain private keys, nothing to encrypt.");
257	3	}
258
259	18	if (pwallet->HasEncryptionKeys()) {
260	1	throw JSONRPCError(RPC_WALLET_WRONG_ENC_STATE, "Error: running with an encrypted wallet, but encryptwallet was called.");
261	1	}
262
263	17	if (pwallet->IsScanningWithPassphrase()) {
264	0	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	0	}
266
267	17	LOCK2(pwallet->m_relock_mutex, pwallet->cs_wallet);
268
269	17	SecureString strWalletPass;
270	17	strWalletPass.reserve(100);
271	17	strWalletPass = std::string_view{request.params[0].get_str()};
272
273	17	if (strWalletPass.empty()) {
274	1	throw JSONRPCError(RPC_INVALID_PARAMETER, "passphrase cannot be empty");
275	1	}
276
277	16	if (!pwallet->EncryptWallet(strWalletPass)) {
278	0	throw JSONRPCError(RPC_WALLET_ENCRYPTION_FAILED, "Error: Failed to encrypt the wallet.");
279	0	}
280
281	16	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	16	},
283	852	};
284	852	}
285		} // namespace wallet