add setrate

deploy.sh

@@ -19,6 +19,7 @@ cleos -u $ENDPOINT set contract $TOKEN ./ $TOKEN.wasm $TOKEN.abi
 cleos -u $ENDPOINT set contract eosio.token ./ $TOKEN.wasm $TOKEN.abi
 
 cleos push action $TOKEN create '["xy", "1000000000.0000 XY"]' -p $TOKEN
+cleos push action $TOKEN create '["xy", "1000000000.0000 EOSXY"]' -p $TOKEN
 cleos push action $TOKEN issue '["xy", "1.0000 XY", "init"]' -p $CODE
 
 cleos push action eosio.token create '["eosio.token", "1000000000.0000 EOS"]' -p eosio.token

include/xy/xy.hpp

@@ -11,7 +11,7 @@
 
 #include <xy/structs.hpp>
 #include <token.xy/token.xy.hpp>
-// #include <eosio.token/eosio.token.hpp>
+#include <eosio.system/exchange_state.hpp>
 #include <mapbox/geometry.hpp>
 
 using namespace eosio;
@@ -142,6 +142,19 @@ class [[eosio::contract("xy")]] xy : public contract {
                  const uint64_t      id,
                  const vector<tag>   tags );
 
+    /**
+     * ACTION `setrate`
+     *
+     * Set rate of <chain>XY token
+     *
+     * @param {asset} rate - rate value
+     * @example
+     *
+     * cleos push action xy setrate '["0.1000 EOSXY""]'
+     */
+    [[eosio::action]]
+    void setrate( const asset rate );
+
     /**
      * Notify contract when eosio.token deposits core symbol
      *
@@ -153,13 +166,6 @@ class [[eosio::contract("xy")]] xy : public contract {
                    const asset&   quantity,
                    const string&  memo );
 
-    /**
-     * PRIVATE ACTION `clean`
-     *
-     * Removes all rows in tables
-     */
-    [[eosio::action]] void clean();
-
     using createnode_action = eosio::action_wrapper<"createnode"_n, &xy::createnode>;
     using createway_action = eosio::action_wrapper<"createway"_n, &xy::createway>;
     using createrel_action = eosio::action_wrapper<"createrel"_n, &xy::createrel>;
@@ -175,6 +181,7 @@ class [[eosio::contract("xy")]] xy : public contract {
      */
     struct [[eosio::table("global")]] global_row {
         uint64_t available_primary_key = 0;
+        asset rate = asset{10000, symbol{"EOSXY", 4}};
     };
 
     /**

src/get_trx_id.cpp

@@ -0,0 +1,10 @@
+#include <eosio/transaction.hpp>
+#include <eosio/crypto.hpp>
+
+checksum256 xy::get_trx_id() {
+    size_t size = transaction_size();
+    char buf[size];
+    size_t read = read_transaction( buf, size );
+    check( size == read, "read_transaction failed");
+    return sha256( buf, read );
+}

src/global.cpp

@@ -0,0 +1,26 @@
+uint64_t xy::global_available_primary_key() {
+    auto global = _global.get_or_default();
+    uint64_t available_primary_key = global.available_primary_key;
+    global.available_primary_key += 1;
+    _global.set(global, get_self());
+    return available_primary_key;
+}
+
+/**
+ * ACTION setrate
+ */
+void xy::setrate( asset rate )
+{
+    require_auth( get_self() );
+
+    auto sym_code = rate.symbol.code();
+    const asset supply = token::get_supply( TOKEN_CONTRACT, sym_code );
+
+    check( rate.is_valid(), "invalid rate" );
+    check( rate.amount > 0, "must set rate positive rate" );
+    check( rate.symbol == supply.symbol, "symbol precision mismatch" );
+
+    auto global = _global.get_or_default();
+    global.rate = rate;
+    _global.set(global, get_self());
+}

src/on_notify.cpp

@@ -1,3 +1,5 @@
+#include <math.h>       /* pow */
+
 [[eosio::on_notify("eosio.token::transfer")]]
 void xy::transfer( const name&    from,
                    const name&    to,
@@ -10,11 +12,14 @@ void xy::transfer( const name&    from,
     // authenticate incoming `from` account
     require_auth( from );
 
-    asset swap_quantity = asset{10000, symbol{"XY", 4}};
+    asset rate = _global.get_or_default().rate;
+    symbol sym = symbol{quantity.symbol.code().to_string() + "XY", 4};
+    int64_t amount = quantity.amount / (rate.amount / pow(10, rate.symbol.precision()) );
+    asset convert_quantity = asset{amount, sym};
 
     token::issue_action issue(TOKEN_CONTRACT, {get_self(), "active"_n});
-    issue.send(get_self(), swap_quantity, "token swap");
+    issue.send(get_self(), convert_quantity, "convert");
 
     token::transfer_action transfer(TOKEN_CONTRACT, {get_self(), "active"_n});
-    transfer.send(get_self(), from, swap_quantity, "token swap");
-}
+    transfer.send(get_self(), from, convert_quantity, "convert");
+}

src/utils.cpp

@@ -1,19 +1,3 @@
-#include <eosio/transaction.hpp>
-#include <eosio/crypto.hpp>
-
-checksum256 xy::get_trx_id() {
-    size_t size = transaction_size();
-    char buf[size];
-    size_t read = read_transaction( buf, size );
-    check( size == read, "read_transaction failed");
-    return sha256( buf, read );
-}
-
-uint64_t xy::global_available_primary_key() {
-    uint64_t available_primary_key = _global.get_or_default().available_primary_key;
-    _global.set(global_row{ available_primary_key + 1 }, get_self());
-    return available_primary_key;
-}
 
 name xy::get_owner( uint64_t id ) {
     if (node_exists( id )) {

src/xy.cpp

@@ -4,8 +4,9 @@
 #include "way.cpp"
 #include "relation.cpp"
 #include "tag.cpp"
-#include "clean.cpp"
 #include "erase.cpp"
 #include "utils.cpp"
 #include "consume.cpp"
 #include "on_notify.cpp"
+#include "get_trx_id.cpp"
+#include "global.cpp"

test.sh

@@ -6,24 +6,26 @@ USER=bob
 
 ENDPOINT=http://localhost:8888
 
+cleos push action $CODE setrate '["0.1000 EOSXY"]' -p $CODE
+
 cleos -u $ENDPOINT transfer $USER $CODE "1.0000 EOS"
 
-cleos -u $ENDPOINT push action $CODE createnode \
-    "[${USER},[45.123, 150.123], [{\"k\":\"second\",\"v\":\"value0\"}]]" \
-    -p $USER
+# cleos -u $ENDPOINT push action $CODE createnode \
+#     "[${USER},[45.123, 150.123], [{\"k\":\"second\",\"v\":\"value0\"}]]" \
+#     -p $USER
 
-cleos -u $ENDPOINT push action $CODE createway \
-    "[${USER},[[-25, -45], [65, 180]], [{\"k\":\"second\",\"v\":\"value0\"}]]" \
-    -p $USER
+# cleos -u $ENDPOINT push action $CODE createway \
+#     "[${USER},[[-25, -45], [65, 180]], [{\"k\":\"second\",\"v\":\"value0\"}]]" \
+#     -p $USER
 
-cleos -u $ENDPOINT push action $CODE createrel \
-    "[${USER},[{\"type\": \"way\", \"ref\": 1, \"role\": \"\"}, {\"type\": \"node\", \"ref\": 0, \"role\": \"\"}], [{\"k\":\"foo\", \"v\": \"bar\"}]]" \
-    -p $USER
+# cleos -u $ENDPOINT push action $CODE createrel \
+#     "[${USER},[{\"type\": \"way\", \"ref\": 1, \"role\": \"\"}, {\"type\": \"node\", \"ref\": 0, \"role\": \"\"}], [{\"k\":\"foo\", \"v\": \"bar\"}]]" \
+#     -p $USER
 
-cleos -u $ENDPOINT push action $CODE move \
-    "[${USER},0, [20, 50]]" \
-    -p $USER
+# cleos -u $ENDPOINT push action $CODE move \
+#     "[${USER},0, [20, 50]]" \
+#     -p $USER
 
-cleos -u $ENDPOINT push action $CODE modify \
-    "[${USER}, 1, [{\"k\":\"second\", \"v\": \"updated\"}]]" \
-    -p $USER
+# cleos -u $ENDPOINT push action $CODE modify \
+#     "[${USER}, 1, [{\"k\":\"second\", \"v\": \"updated\"}]]" \
+#     -p $USER