30 files changed, 170 insertions, 44 deletions
diff --git a/src/util/asmap.cpp b/src/util/asmap.cpp
index b696c65e9d..ffa2755970 100644
--- a/src/util/asmap.cpp
+++ b/src/util/asmap.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019-2020 The Bitcoin Core developers
+// Copyright (c) 2019-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/asmap.h b/src/util/asmap.h
index 810d70b9a1..844037f816 100644
--- a/src/util/asmap.h
+++ b/src/util/asmap.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019-2020 The Bitcoin Core developers
+// Copyright (c) 2019-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/check.h b/src/util/check.h
index b12527546c..a443c13cf2 100644
--- a/src/util/check.h
+++ b/src/util/check.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019-2020 The Bitcoin Core developers
+// Copyright (c) 2019-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/epochguard.h b/src/util/epochguard.h
index 3e63e093da..0fec7d2624 100644
--- a/src/util/epochguard.h
+++ b/src/util/epochguard.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/error.cpp b/src/util/error.cpp
index d019ba018d..af8cbd0353 100644
--- a/src/util/error.cpp
+++ b/src/util/error.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2010-2020 The Bitcoin Core developers
+// Copyright (c) 2010-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/fastrange.h b/src/util/fastrange.h
new file mode 100644
index 0000000000..77cb883ce0
--- /dev/null
+++ b/src/util/fastrange.h
@@ -0,0 +1,51 @@
+// Copyright (c) 2018-2020 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_UTIL_FASTRANGE_H
+#define BITCOIN_UTIL_FASTRANGE_H
+
+#include <cstdint>
+
+/* This file offers implementations of the fast range reduction technique described
+ * in https://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
+ *
+ * In short, they take an integer x and a range n, and return the upper bits of
+ * (x * n). If x is uniformly distributed over its domain, the result is as close to
+ * uniformly distributed over [0, n) as (x mod n) would be, but significantly faster.
+ */
+
+/** Fast range reduction with 32-bit input and 32-bit range. */
+static inline uint32_t FastRange32(uint32_t x, uint32_t n)
+{
+    return (uint64_t{x} * n) >> 32;
+}
+
+/** Fast range reduction with 64-bit input and 64-bit range. */
+static inline uint64_t FastRange64(uint64_t x, uint64_t n)
+{
+#ifdef __SIZEOF_INT128__
+    return (static_cast<unsigned __int128>(x) * static_cast<unsigned __int128>(n)) >> 64;
+#else
+    // To perform the calculation on 64-bit numbers without losing the
+    // result to overflow, split the numbers into the most significant and
+    // least significant 32 bits and perform multiplication piece-wise.
+    //
+    // See: https://stackoverflow.com/a/26855440
+    const uint64_t x_hi = x >> 32;
+    const uint64_t x_lo = x & 0xFFFFFFFF;
+    const uint64_t n_hi = n >> 32;
+    const uint64_t n_lo = n & 0xFFFFFFFF;
+
+    const uint64_t ac = x_hi * n_hi;
+    const uint64_t ad = x_hi * n_lo;
+    const uint64_t bc = x_lo * n_hi;
+    const uint64_t bd = x_lo * n_lo;
+
+    const uint64_t mid34 = (bd >> 32) + (bc & 0xFFFFFFFF) + (ad & 0xFFFFFFFF);
+    const uint64_t upper64 = ac + (bc >> 32) + (ad >> 32) + (mid34 >> 32);
+    return upper64;
+#endif
+}
+
+#endif // BITCOIN_UTIL_FASTRANGE_H
diff --git a/src/util/golombrice.h b/src/util/golombrice.h
index 67d262406f..4ff4f6d7e5 100644
--- a/src/util/golombrice.h
+++ b/src/util/golombrice.h
@@ -5,6 +5,8 @@
 #ifndef BITCOIN_UTIL_GOLOMBRICE_H
 #define BITCOIN_UTIL_GOLOMBRICE_H
 
+#include <util/fastrange.h>
+
 #include <streams.h>
 
 #include <cstdint>
diff --git a/src/util/hasher.h b/src/util/hasher.h
index 9b79a1b5f1..3d24a4d23c 100644
--- a/src/util/hasher.h
+++ b/src/util/hasher.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/macros.h b/src/util/macros.h
index 0887c80fd7..c9740c8e82 100644
--- a/src/util/macros.h
+++ b/src/util/macros.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/message.cpp b/src/util/message.cpp
index 73948e4ff1..2c7f0406f0 100644
--- a/src/util/message.cpp
+++ b/src/util/message.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/moneystr.cpp b/src/util/moneystr.cpp
index 1aed7daacf..2cd7a426f8 100644
--- a/src/util/moneystr.cpp
+++ b/src/util/moneystr.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/moneystr.h b/src/util/moneystr.h
index f37dc1cffd..8180604342 100644
--- a/src/util/moneystr.h
+++ b/src/util/moneystr.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/overflow.h b/src/util/overflow.h
new file mode 100644
index 0000000000..5982af8d04
--- /dev/null
+++ b/src/util/overflow.h
@@ -0,0 +1,31 @@
+// Copyright (c) 2021 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_UTIL_OVERFLOW_H
+#define BITCOIN_UTIL_OVERFLOW_H
+
+#include <limits>
+#include <type_traits>
+
+template <class T>
+[[nodiscard]] bool AdditionOverflow(const T i, const T j) noexcept
+{
+    static_assert(std::is_integral<T>::value, "Integral required.");
+    if (std::numeric_limits<T>::is_signed) {
+        return (i > 0 && j > std::numeric_limits<T>::max() - i) ||
+               (i < 0 && j < std::numeric_limits<T>::min() - i);
+    }
+    return std::numeric_limits<T>::max() - i < j;
+}
+
+template <class T>
+[[nodiscard]] std::optional<T> CheckedAdd(const T i, const T j) noexcept
+{
+    if (AdditionOverflow(i, j)) {
+        return std::nullopt;
+    }
+    return i + j;
+}
+
+#endif // BITCOIN_UTIL_OVERFLOW_H
diff --git a/src/util/rbf.h b/src/util/rbf.h
index aa522d8bfb..a957617389 100644
--- a/src/util/rbf.h
+++ b/src/util/rbf.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2019 The Bitcoin Core developers
+// Copyright (c) 2016-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/readwritefile.h b/src/util/readwritefile.h
index a59d0be131..73437baf1b 100644
--- a/src/util/readwritefile.h
+++ b/src/util/readwritefile.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2020 The Bitcoin Core developers
+// Copyright (c) 2015-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/settings.cpp b/src/util/settings.cpp
index 7fb35c073e..683b7ae652 100644
--- a/src/util/settings.cpp
+++ b/src/util/settings.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2019 The Bitcoin Core developers
+// Copyright (c) 2019-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -112,7 +112,7 @@ bool WriteSettings(const fs::path& path,
         errors.emplace_back(strprintf("Error: Unable to open settings file %s for writing", fs::PathToString(path)));
         return false;
     }
-    file << out.write(/* prettyIndent= */ 1, /* indentLevel= */ 4) << std::endl;
+    file << out.write(/* prettyIndent= */ 4, /* indentLevel= */ 1) << std::endl;
     file.close();
     return true;
 }
diff --git a/src/util/sock.cpp b/src/util/sock.cpp
index 1a4d67a65e..2029d70a37 100644
--- a/src/util/sock.cpp
+++ b/src/util/sock.cpp
@@ -10,6 +10,7 @@
 #include <util/system.h>
 #include <util/time.h>
 
+#include <memory>
 #include <stdexcept>
 #include <string>
 
@@ -73,6 +74,32 @@ int Sock::Connect(const sockaddr* addr, socklen_t addr_len) const
     return connect(m_socket, addr, addr_len);
 }
 
+std::unique_ptr<Sock> Sock::Accept(sockaddr* addr, socklen_t* addr_len) const
+{
+#ifdef WIN32
+    static constexpr auto ERR = INVALID_SOCKET;
+#else
+    static constexpr auto ERR = SOCKET_ERROR;
+#endif
+
+    std::unique_ptr<Sock> sock;
+
+    const auto socket = accept(m_socket, addr, addr_len);
+    if (socket != ERR) {
+        try {
+            sock = std::make_unique<Sock>(socket);
+        } catch (const std::exception&) {
+#ifdef WIN32
+            closesocket(socket);
+#else
+            close(socket);
+#endif
+        }
+    }
+
+    return sock;
+}
+
 int Sock::GetSockOpt(int level, int opt_name, void* opt_val, socklen_t* opt_len) const
 {
     return getsockopt(m_socket, level, opt_name, static_cast<char*>(opt_val), opt_len);
diff --git a/src/util/sock.h b/src/util/sock.h
index 59cc8c0b1d..7510482857 100644
--- a/src/util/sock.h
+++ b/src/util/sock.h
@@ -10,6 +10,7 @@
 #include <util/time.h>
 
 #include <chrono>
+#include <memory>
 #include <string>
 
 /**
@@ -97,6 +98,14 @@ public:
     [[nodiscard]] virtual int Connect(const sockaddr* addr, socklen_t addr_len) const;
 
     /**
+     * accept(2) wrapper. Equivalent to `std::make_unique<Sock>(accept(this->Get(), addr, addr_len))`.
+     * Code that uses this wrapper can be unit tested if this method is overridden by a mock Sock
+     * implementation.
+     * The returned unique_ptr is empty if `accept()` failed in which case errno will be set.
+     */
+    [[nodiscard]] virtual std::unique_ptr<Sock> Accept(sockaddr* addr, socklen_t* addr_len) const;
+
+    /**
      * getsockopt(2) wrapper. Equivalent to
      * `getsockopt(this->Get(), level, opt_name, opt_val, opt_len)`. Code that uses this
      * wrapper can be unit tested if this method is overridden by a mock Sock implementation.
diff --git a/src/util/spanparsing.cpp b/src/util/spanparsing.cpp
index e2e2782bec..50f6aee419 100644
--- a/src/util/spanparsing.cpp
+++ b/src/util/spanparsing.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2018-2019 The Bitcoin Core developers
+// Copyright (c) 2018-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/strencodings.cpp b/src/util/strencodings.cpp
index 430f1963ea..a386f2b7b3 100644
--- a/src/util/strencodings.cpp
+++ b/src/util/strencodings.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -92,7 +92,7 @@ std::vector<unsigned char> ParseHex(const char* psz)
         signed char c = HexDigit(*psz++);
         if (c == (signed char)-1)
             break;
-        unsigned char n = (c << 4);
+        auto n{uint8_t(c << 4)};
         c = HexDigit(*psz++);
         if (c == (signed char)-1)
             break;
@@ -141,8 +141,7 @@ std::string EncodeBase64(Span<const unsigned char> input)
 
 std::vector<unsigned char> DecodeBase64(const char* p, bool* pf_invalid)
 {
-    static const int decode64_table[256] =
-    {
+    static const int8_t decode64_table[256]{
         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
         -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1,
@@ -164,7 +163,7 @@ std::vector<unsigned char> DecodeBase64(const char* p, bool* pf_invalid)
     while (*p != 0) {
         int x = decode64_table[(unsigned char)*p];
         if (x == -1) break;
-        val.push_back(x);
+        val.push_back(uint8_t(x));
         ++p;
     }
 
@@ -220,8 +219,7 @@ std::string EncodeBase32(const std::string& str, bool pad)
 
 std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid)
 {
-    static const int decode32_table[256] =
-    {
+    static const int8_t decode32_table[256]{
         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, -1, -1, -1, -1,
@@ -243,7 +241,7 @@ std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid)
     while (*p != 0) {
         int x = decode32_table[(unsigned char)*p];
         if (x == -1) break;
-        val.push_back(x);
+        val.push_back(uint8_t(x));
         ++p;
     }
 
@@ -491,14 +489,14 @@ bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out)
 std::string ToLower(const std::string& str)
 {
     std::string r;
-    for (auto ch : str) r += ToLower((unsigned char)ch);
+    for (auto ch : str) r += ToLower(ch);
     return r;
 }
 
 std::string ToUpper(const std::string& str)
 {
     std::string r;
-    for (auto ch : str) r += ToUpper((unsigned char)ch);
+    for (auto ch : str) r += ToUpper(ch);
     return r;
 }
 
diff --git a/src/util/strencodings.h b/src/util/strencodings.h
index 08a5465de1..1f83fa3ffa 100644
--- a/src/util/strencodings.h
+++ b/src/util/strencodings.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -16,6 +16,7 @@
 #include <charconv>
 #include <cstdint>
 #include <iterator>
+#include <limits>
 #include <optional>
 #include <string>
 #include <vector>
@@ -93,8 +94,12 @@ void SplitHostPort(std::string in, uint16_t& portOut, std::string& hostOut);
 // New code should use ToIntegral or the ParseInt* functions
 // which provide parse error feedback.
 //
-// The goal of LocaleIndependentAtoi is to replicate the exact defined behaviour
-// of atoi and atoi64 as they behave under the "C" locale.
+// The goal of LocaleIndependentAtoi is to replicate the defined behaviour of
+// std::atoi as it behaves under the "C" locale, and remove some undefined
+// behavior. If the parsed value is bigger than the integer type's maximum
+// value, or smaller than the integer type's minimum value, std::atoi has
+// undefined behavior, while this function returns the maximum or minimum
+// values, respectively.
 template <typename T>
 T LocaleIndependentAtoi(const std::string& str)
 {
@@ -109,7 +114,15 @@ T LocaleIndependentAtoi(const std::string& str)
         s = s.substr(1);
     }
     auto [_, error_condition] = std::from_chars(s.data(), s.data() + s.size(), result);
-    if (error_condition != std::errc{}) {
+    if (error_condition == std::errc::result_out_of_range) {
+        if (s.length() >= 1 && s[0] == '-') {
+            // Saturate underflow, per strtoll's behavior.
+            return std::numeric_limits<T>::min();
+        } else {
+            // Saturate overflow, per strtoll's behavior.
+            return std::numeric_limits<T>::max();
+        }
+    } else if (error_condition != std::errc{}) {
         return 0;
     }
     return result;
@@ -226,7 +239,7 @@ bool TimingResistantEqual(const T& a, const T& b)
     if (b.size() == 0) return a.size() == 0;
     size_t accumulator = a.size() ^ b.size();
     for (size_t i = 0; i < a.size(); i++)
-        accumulator |= a[i] ^ b[i%b.size()];
+        accumulator |= size_t(a[i] ^ b[i%b.size()]);
     return accumulator == 0;
 }
 
diff --git a/src/util/string.h b/src/util/string.h
index 07c87cfcda..a3b8df8d78 100644
--- a/src/util/string.h
+++ b/src/util/string.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019-2020 The Bitcoin Core developers
+// Copyright (c) 2019-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/syscall_sandbox.cpp b/src/util/syscall_sandbox.cpp
index 6e1cc9b457..3c250b7704 100644
--- a/src/util/syscall_sandbox.cpp
+++ b/src/util/syscall_sandbox.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2020 The Bitcoin Core developers
+// Copyright (c) 2020-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/syscall_sandbox.h b/src/util/syscall_sandbox.h
index 0a0c964f94..f7a1cbdb55 100644
--- a/src/util/syscall_sandbox.h
+++ b/src/util/syscall_sandbox.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2020 The Bitcoin Core developers
+// Copyright (c) 2020-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/system.cpp b/src/util/system.cpp
index 99d111b066..e34cdc7fb9 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -1,16 +1,11 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 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 <util/system.h>
 
 #ifdef ENABLE_EXTERNAL_SIGNER
-#if defined(WIN32) && !defined(__kernel_entry)
-// A workaround for boost 1.71 incompatibility with mingw-w64 compiler.
-// For details see https://github.com/bitcoin/bitcoin/pull/22348.
-#define __kernel_entry
-#endif
 #include <boost/process.hpp>
 #endif // ENABLE_EXTERNAL_SIGNER
 
diff --git a/src/util/system.h b/src/util/system.h
index 37d976221b..a8fd21fcaa 100644
--- a/src/util/system.h
+++ b/src/util/system.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/time.cpp b/src/util/time.cpp
index eda710b12c..f7712f0dc8 100644
--- a/src/util/time.cpp
+++ b/src/util/time.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/time.h b/src/util/time.h
index 4aee01967d..9d92b23725 100644
--- a/src/util/time.h
+++ b/src/util/time.h
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2020 The Bitcoin Core developers
+// Copyright (c) 2009-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/trace.h b/src/util/trace.h
index bb901e05da..7a63f39c83 100644
--- a/src/util/trace.h
+++ b/src/util/trace.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2020 The Bitcoin Core developers
+// Copyright (c) 2020-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/util/translation.h b/src/util/translation.h
index 62388b568c..aee601d9c1 100644
--- a/src/util/translation.h
+++ b/src/util/translation.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2019-2020 The Bitcoin Core developers
+// Copyright (c) 2019-2021 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.