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-rw-r--r--src/util/check.h41
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+// 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.
+
+#ifndef BITCOIN_UTIL_CHECK_H
+#define BITCOIN_UTIL_CHECK_H
+
+#include <tinyformat.h>
+
+#include <stdexcept>
+
+class NonFatalCheckError : public std::runtime_error
+{
+ using std::runtime_error::runtime_error;
+};
+
+/**
+ * Throw a NonFatalCheckError when the condition evaluates to false
+ *
+ * This should only be used
+ * - where the condition is assumed to be true, not for error handling or validating user input
+ * - where a failure to fulfill the condition is recoverable and does not abort the program
+ *
+ * For example in RPC code, where it is undersirable to crash the whole program, this can be generally used to replace
+ * asserts or recoverable logic errors. A NonFatalCheckError in RPC code is caught and passed as a string to the RPC
+ * caller, which can then report the issue to the developers.
+ */
+#define CHECK_NONFATAL(condition) \
+ do { \
+ if (!(condition)) { \
+ throw NonFatalCheckError( \
+ strprintf("%s:%d (%s)\n" \
+ "Internal bug detected: '%s'\n" \
+ "You may report this issue here: %s\n", \
+ __FILE__, __LINE__, __func__, \
+ (#condition), \
+ PACKAGE_BUGREPORT)); \
+ } \
+ } while (false)
+
+#endif // BITCOIN_UTIL_CHECK_H