Merge pull request #464 from balancednetwork/feat/dex-borrowing

feat: Add option for governance to borrow from dex

Author: AntonAndell

core-contracts/Dex/src/main/java/network/balanced/score/core/dex/AbstractDex.java

@@ -644,6 +644,19 @@ public void govWithdraw(int id, Address token, BigInteger value) {
         Context.call(token, "transfer", getDaofund(), value);
     }
 
+    @External
+    public void governanceBorrow(Address token, BigInteger amount, Address recipient) {
+        onlyGovernance();
+        BigInteger currentDebt = governanceDebt.getOrDefault(token, BigInteger.ZERO);
+        governanceDebt.set(token, currentDebt.add(amount));
+        Context.call(token, "transfer", recipient, amount);
+    }
+
+    @External(readonly=true)
+    public BigInteger getGovernanceDebt(Address token) {
+        return governanceDebt.getOrDefault(token, BigInteger.ZERO);
+    }
+
     @External
     public void govSetPoolTotal(int pid, BigInteger total) {
         onlyGovernance();

core-contracts/Dex/src/main/java/network/balanced/score/core/dex/DexDBVariables.java

@@ -58,6 +58,7 @@ public class DexDBVariables {
     private static final String TOKEN_PRECISIONS = "token_precisions";
     public static final String VERSION = "version";
     public static final String ORACLE_PROTECTION = "oracle_protection";
+    public static final String GOV_DEBT = "governance_debt";
 
 
     final static VarDB<Address> governance = Context.newVarDB(GOVERNANCE_ADDRESS, Address.class);
@@ -137,4 +138,8 @@ public class DexDBVariables {
 
     //Map: pid -> percentage
     public final static DictDB<BigInteger, BigInteger> oracleProtection = Context.newDictDB(ORACLE_PROTECTION, BigInteger.class);
+
+    //Map: token -> amount
+    final static DictDB<Address, BigInteger> governanceDebt = Context.newDictDB(GOV_DEBT, BigInteger.class);
+
 }

score-lib/src/main/java/network/balanced/score/lib/interfaces/Dex.java

@@ -207,5 +207,10 @@ void xAdd(String from, String _baseToken, String _quoteToken, BigInteger _baseVa
     @External
     void addLpAddresses(BigInteger _poolId, Address[] _addresses);
 
+    @External
+    void governanceBorrow(Address token, BigInteger amount, Address recipient);
+
+    @External(readonly=true)
+    BigInteger getGovernanceDebt(Address token);
 }