Arbitrary M/N multisig schemes:

* support in wallet2
* support in monero-wallet-cli
* support in monero-wallet-rpc
* support in wallet api
* support in monero-gen-trusted-multisig
* unit tests for multisig wallets creation

1 files changed, 50 insertions, 1 deletions

diff --git a/src/wallet/wallet_rpc_server.cpp b/src/wallet/wallet_rpc_server.cpp
index e6eb64d12..b8379448d 100644
--- a/src/wallet/wallet_rpc_server.cpp
+++ b/src/wallet/wallet_rpc_server.cpp
@@ -3119,7 +3119,7 @@ namespace tools
       return false;
     }
 
-    if (req.multisig_info.size() < threshold - 1)
+    if (req.multisig_info.size() < 1 || req.multisig_info.size() > total)
     {
       er.code = WALLET_RPC_ERROR_CODE_THRESHOLD_NOT_REACHED;
       er.message = "Needs multisig info from more participants";
@@ -3146,6 +3146,55 @@ namespace tools
     return true;
   }
   //------------------------------------------------------------------------------------------------------------------------------
+  bool wallet_rpc_server::on_exchange_multisig_keys(const wallet_rpc::COMMAND_RPC_EXCHANGE_MULTISIG_KEYS::request& req, wallet_rpc::COMMAND_RPC_EXCHANGE_MULTISIG_KEYS::response& res, epee::json_rpc::error& er)
+  {
+    if (!m_wallet) return not_open(er);
+    if (m_restricted)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_DENIED;
+      er.message = "Command unavailable in restricted mode.";
+      return false;
+    }
+    bool ready;
+    uint32_t threshold, total;
+    if (!m_wallet->multisig(&ready, &threshold, &total))
+    {
+      er.code = WALLET_RPC_ERROR_CODE_NOT_MULTISIG;
+      er.message = "This wallet is not multisig";
+      return false;
+    }
+
+    if (ready)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_ALREADY_MULTISIG;
+      er.message = "This wallet is multisig, and already finalized";
+      return false;
+    }
+
+    if (req.multisig_info.size() < 1 || req.multisig_info.size() > total)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_THRESHOLD_NOT_REACHED;
+      er.message = "Needs multisig info from more participants";
+      return false;
+    }
+
+    try
+    {
+      res.multisig_info = m_wallet->exchange_multisig_keys(req.password, req.multisig_info);
+      if (res.multisig_info.empty())
+      {
+        res.address = m_wallet->get_account().get_public_address_str(m_wallet->nettype());
+      }
+    }
+    catch (const std::exception &e)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+      er.message = std::string("Error calling exchange_multisig_info: ") + e.what();
+      return false;
+    }
+    return true;
+  }
+  //------------------------------------------------------------------------------------------------------------------------------
   bool wallet_rpc_server::on_sign_multisig(const wallet_rpc::COMMAND_RPC_SIGN_MULTISIG::request& req, wallet_rpc::COMMAND_RPC_SIGN_MULTISIG::response& res, epee::json_rpc::error& er)
   {
     if (!m_wallet) return not_open(er);