Added min/max limits for exchange transactions in bridge

src/deploy/deploy-home/.env.development

@@ -10,3 +10,6 @@ VALIDATOR_ADDRESS_3=0x6352e3e6038e05b9da00c84ae851308f9774f883
 #VALIDATOR_ADDRESS_4=0x4db6b4bd0a3fdc03b027a60f1c48f05c572312aa
 
 THRESHOLD=1
+
+MIN_TX_LIMIT=10000000000000000
+MAX_TX_LIMIT=100000000000000000000

src/deploy/deploy-home/.env.staging

@@ -11,3 +11,6 @@ VALIDATOR_ADDRESS_3=0xcccc27ae510b63E30eC3C68AAD7DdD2578bD62ed
 #VALIDATOR_ADDRESS_4=0xdddd9300e32fe162bA420f7313651Fd901C2ed71
 
 THRESHOLD=1
+
+MIN_TX_LIMIT=10000000000000000
+MAX_TX_LIMIT=100000000000000000000

src/deploy/deploy-home/contracts/Bridge.sol

@@ -47,7 +47,10 @@ contract Bridge {
     uint public epoch;
     uint public nextEpoch;
 
-    constructor(uint threshold, address[] memory validators, address _tokenContract) public {
+    uint minTxLimit;
+    uint maxTxLimit;
+
+    constructor(uint threshold, address[] memory validators, address _tokenContract, uint[2] memory limits) public {
         require(validators.length > 0);
         require(threshold < validators.length);
 
@@ -59,6 +62,9 @@ contract Bridge {
 
         states[1] = State(validators, threshold, 0, 0);
 
+        minTxLimit = limits[0];
+        maxTxLimit = limits[1];
+
         emit NewEpoch(0, 1);
     }
 
@@ -95,7 +101,7 @@ contract Bridge {
     }
 
     function exchange(uint value) public ready {
-        require(value >= 10 ** 10);
+        require(value >= minTxLimit && value >= 10 ** 10 && value <= maxTxLimit);
 
         tokenContract.transferFrom(msg.sender, address(this), value);
         emit ExchangeRequest(value);

src/deploy/deploy-home/migrations/1_deployment.js

@@ -5,7 +5,7 @@ const addresses = Object.entries(process.env)
   .map(([ , value ]) => value)
 
 const {
-  THRESHOLD, HOME_TOKEN_ADDRESS
+  THRESHOLD, HOME_TOKEN_ADDRESS, MIN_TX_LIMIT, MAX_TX_LIMIT
 } = process.env
 
 module.exports = deployer => {
@@ -13,6 +13,7 @@ module.exports = deployer => {
     Bridge,
     THRESHOLD,
     addresses,
-    HOME_TOKEN_ADDRESS
+    HOME_TOKEN_ADDRESS,
+    [ MIN_TX_LIMIT, MAX_TX_LIMIT ]
   )
 }