Get the account id for a public key

Author: ximinez

src/OfflineTool.cpp

@@ -22,6 +22,8 @@
 #include <RippleKey.h>
 #include <Serialize.h>
 
+#include <ripple/basics/Slice.h>
+#include <ripple/basics/StringUtilities.h>
 #include <ripple/beast/core/SemanticVersion.h>
 #include <ripple/beast/unit_test.h>
 #include <ripple/protocol/BuildInfo.h>
@@ -285,6 +287,33 @@ doCreateKeyfile(
     return EXIT_SUCCESS;
 }
 
+int
+doPublicKey(std::string const& publicKeyHex)
+{
+    auto error = [&publicKeyHex]() -> boost::optional<char const*> {
+        using namespace ripple;
+        if (auto blob = strUnHex(publicKeyHex))
+        {
+            auto const slice = makeSlice(*blob);
+            if (!publicKeyType(slice))
+                return "Bad public key format.";
+            PublicKey const publicKey(slice);
+            auto const idSigner = calcAccountID(publicKey);
+            std::cout << "Public key: " << publicKey
+                      << "\nAccount ID: " << idSigner << std::endl;
+            return {};
+        }
+        else
+        {
+            return "Invalid hex";
+        }
+    }();
+    if (error)
+        std::cerr << "Invalid public key " << publicKeyHex << " " << *error
+                  << std::endl;
+    return EXIT_FAILURE;
+}
+
 std::string
 getStdin()
 {
@@ -347,6 +376,10 @@ runCommand(
     auto const argumenterror = []() {
         throw std::runtime_error("Syntax error: Wrong number of arguments");
     };
+    auto const publickey =
+        [](auto const& publicKeyHex, auto const&, auto const&) {
+            return doPublicKey(*publicKeyHex);
+        };
     static map<string, commandParams> const commandArgs = {
         {"serialize", {false, serialize}},
         {"deserialize", {false, deserialize}},
@@ -355,6 +388,7 @@ runCommand(
         {"asign", {false, asign}},
         {"txhash", {false, txhash}},
         {"createkeyfile", {true, createkeyfile}},
+        {"publickey", {false, publickey}},
     };
 
     auto const iArgs = commandArgs.find(command);
@@ -428,6 +462,10 @@ printHelp(
     createkeyfile [<key>|--stdin]       Create keyfile. A random
       seed will be used if no <key> is provided on the command line
       or from standard input using --stdin.
+  Miscellaneous:
+    publickey <hex public key>          Get the account id from
+      a public key.
+
 
       Default keyfile is: )"
               << defaultKeyfile << "\n";