[test] move wallet helper functions into test library

src/test/util/wallet.cpp

@@ -0,0 +1,40 @@
+// Copyright (c) 2019 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 <test/util/wallet.h>
+
+#include <key_io.h>
+#include <outputtype.h>
+#include <script/standard.h>
+#ifdef ENABLE_WALLET
+#include <wallet/wallet.h>
+#endif
+
+const std::string ADDRESS_BCRT1_UNSPENDABLE = "bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj";
+
+#ifdef ENABLE_WALLET
+std::string getnewaddress(CWallet& w)
+{
+    constexpr auto output_type = OutputType::BECH32;
+    CTxDestination dest;
+    std::string error;
+    if (!w.GetNewDestination(output_type, "", dest, error)) assert(false);
+
+    return EncodeDestination(dest);
+}
+
+void importaddress(CWallet& wallet, const std::string& address)
+{
+    auto spk_man = wallet.GetLegacyScriptPubKeyMan();
+    LOCK(wallet.cs_wallet);
+    AssertLockHeld(spk_man->cs_wallet);
+    const auto dest = DecodeDestination(address);
+    assert(IsValidDestination(dest));
+    const auto script = GetScriptForDestination(dest);
+    wallet.MarkDirty();
+    assert(!spk_man->HaveWatchOnly(script));
+    if (!spk_man->AddWatchOnly(script, 0 /* nCreateTime */)) assert(false);
+    wallet.SetAddressBook(dest, /* label */ "", "receive");
+}
+#endif // ENABLE_WALLET