From 738abf03afe3eb4fd41ac83166c7877dbc10fb9e Mon Sep 17 00:00:00 2001
From: Daniel Larimer <dan@bitshares.org>
Date: Wed, 23 Sep 2015 18:22:38 -0400
Subject: [PATCH] adding API call to get potential address sigs: Fix #337

---
 libraries/app/database_api.cpp                | 30 +++++++++++++++++++
 .../app/include/graphene/app/database_api.hpp |  2 ++
 .../graphene/chain/protocol/authority.hpp     |  9 ++++++
 3 files changed, 41 insertions(+)

diff --git a/libraries/app/database_api.cpp b/libraries/app/database_api.cpp
index 3d371bae15..5554f5ab1a 100644
--- a/libraries/app/database_api.cpp
+++ b/libraries/app/database_api.cpp
@@ -92,6 +92,7 @@ class database_api_impl : public std::enable_shared_from_this<database_api_impl>
       std::string get_transaction_hex(const signed_transaction& trx)const;
       set<public_key_type> get_required_signatures( const signed_transaction& trx, const flat_set<public_key_type>& available_keys )const;
       set<public_key_type> get_potential_signatures( const signed_transaction& trx )const;
+      set<address> get_potential_address_signatures( const signed_transaction& trx )const;
       bool verify_authority( const signed_transaction& trx )const;
       bool verify_account_authority( const string& name_or_id, const flat_set<public_key_type>& signers )const;
       processed_transaction validate_transaction( const signed_transaction& trx )const;
@@ -1213,6 +1214,10 @@ set<public_key_type> database_api::get_potential_signatures( const signed_transa
 {
    return my->get_potential_signatures( trx );
 }
+set<address> database_api::get_potential_address_signatures( const signed_transaction& trx )const
+{
+   return my->get_potential_address_signatures( trx );
+}
 
 set<public_key_type> database_api_impl::get_potential_signatures( const signed_transaction& trx )const
 {
@@ -1242,6 +1247,31 @@ set<public_key_type> database_api_impl::get_potential_signatures( const signed_t
    return result;
 }
 
+set<address> database_api_impl::get_potential_address_signatures( const signed_transaction& trx )const
+{
+   set<address> result;
+   trx.get_required_signatures(
+      _db.get_chain_id(),
+      flat_set<public_key_type>(),
+      [&]( account_id_type id )
+      {
+         const auto& auth = id(_db).active;
+         for( const auto& k : auth.get_addresses() )
+            result.insert(k);
+         return &auth;
+      },
+      [&]( account_id_type id )
+      {
+         const auto& auth = id(_db).owner;
+         for( const auto& k : auth.get_addresses() )
+            result.insert(k);
+         return &auth;
+      },
+      _db.get_global_properties().parameters.max_authority_depth
+   );
+   return result;
+}
+
 bool database_api::verify_authority( const signed_transaction& trx )const
 {
    return my->verify_authority( trx );
diff --git a/libraries/app/include/graphene/app/database_api.hpp b/libraries/app/include/graphene/app/database_api.hpp
index 4aedd0edc2..a0503fd6a2 100644
--- a/libraries/app/include/graphene/app/database_api.hpp
+++ b/libraries/app/include/graphene/app/database_api.hpp
@@ -416,6 +416,7 @@ class database_api
        *  to get the minimum subset.
        */
       set<public_key_type> get_potential_signatures( const signed_transaction& trx )const;
+      set<address> get_potential_address_signatures( const signed_transaction& trx )const;
 
       /**
        * @return true of the @ref trx has all of the required signatures, otherwise throws an exception
@@ -536,6 +537,7 @@ FC_API(graphene::app::database_api,
    (get_transaction_hex)
    (get_required_signatures)
    (get_potential_signatures)
+   (get_potential_address_signatures)
    (verify_authority)
    (verify_account_authority)
    (validate_transaction)
diff --git a/libraries/chain/include/graphene/chain/protocol/authority.hpp b/libraries/chain/include/graphene/chain/protocol/authority.hpp
index 0c7d1ac027..b297fb6b2c 100644
--- a/libraries/chain/include/graphene/chain/protocol/authority.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/authority.hpp
@@ -83,6 +83,15 @@ namespace graphene { namespace chain {
             result.push_back(k.first);
          return result;
       }
+      vector<address> get_addresses() const
+      {
+         vector<address> result;
+         result.reserve( address_auths.size() );
+         for( const auto& k : address_auths )
+            result.push_back(k.first);
+         return result;
+      }
+
 
       friend bool operator == ( const authority& a, const authority& b )
       {