feat(lazer): Update EVM Example and Test (#46)

* Update example evm and js

* Not perfectly working test

* Update JS to use real time and make tests pass

* Change js sdk version usage

* No change to js package json

* Use main branch crosschain

Author: darunrs

lazer/evm/lib/pyth-crosschain

@@ -9,6 +9,8 @@ contract ExampleReceiver {
     PythLazer pythLazer;
     uint64 public price;
     uint64 public timestamp;
+    int16 public exponent;
+    uint16 public publisher_count;
 
     constructor(address pythLazerAddress) {
         pythLazer = PythLazer(pythLazerAddress);
@@ -43,7 +45,7 @@ contract ExampleReceiver {
                     uint64 _price;
                     (_price, pos) = PythLazerLib.parseFeedValueUint64(payload, pos);
                     console.log("price %d", _price);
-                    if (feedId == 2 && _timestamp > timestamp) {
+                    if (feedId == 6 && _timestamp > timestamp) {
                         price = _price;
                         timestamp = _timestamp;
                     }
@@ -55,6 +57,16 @@ contract ExampleReceiver {
                     uint64 _price;
                     (_price, pos) = PythLazerLib.parseFeedValueUint64(payload, pos);
                     console.log("best ask price %d", _price);
+                } else if (property == PythLazerLib.PriceFeedProperty.Exponent) {
+                    int16 _exponent;
+                    (_exponent, pos) = PythLazerLib.parseFeedValueInt16(payload, pos);
+                    console.log("exponent %d", _exponent);
+                    exponent = _exponent;
+                } else if (property == PythLazerLib.PriceFeedProperty.PublisherCount) {
+                    uint16 _publisher_count;
+                    (_publisher_count, pos) = PythLazerLib.parseFeedValueUint16(payload, pos);
+                    console.log("publisher count %d", _publisher_count);
+                    publisher_count = _publisher_count;
                 } else {
                     revert("unknown property");
                 }

lazer/evm/src/ExampleReceiver.sol

@@ -9,7 +9,7 @@ contract ExampleReceiverTest is Test {
     function setUp() public {}
 
     function test_1() public {
-        address trustedSigner = 0xEfEf56cD66896f6799A90A4e4d512C330c094e44;
+        address trustedSigner = 0xb8d50f0bAE75BF6E03c104903d7C3aFc4a6596Da;
         console.log("trustedSigner %s", trustedSigner);
 
         address lazer = makeAddr("lazer");
@@ -25,14 +25,16 @@ contract ExampleReceiverTest is Test {
 
         ExampleReceiver receiver = new ExampleReceiver(address(pythLazer));
         bytes memory update =
-            hex"2a22999a577d3cc0202197939d736bc0dcf71b9dde7b9470e4d16fa8e2120c0787a1c0d744d0c39cc372af4d1ecf2d09e84160ca905f3f597d20e2eec144a446a0459ad600001c93c7d3750006240af373971c01010000000201000000000005f5e100";
+            hex"2a22999a9ee4e2a3df5affd0ad8c7c46c96d3b5ef197dd653bedd8f44a4b6b69b767fbc66341e80b80acb09ead98c60d169b9a99657ebada101f447378f227bffbc69d3d01003493c7d37500062cf28659c1e801010000000605000000000005f5e10002000000000000000001000000000000000003000104fff8";
         console.logBytes(update);
 
         vm.prank(consumer);
         receiver.updatePrice{value: 5 * fee}(update);
 
+        assertEq(receiver.timestamp(), 1738270008001000);
         assertEq(receiver.price(), 100000000);
-        assertEq(receiver.timestamp(), 1728479312975644);
+        assertEq(receiver.exponent(), -8);
+        assertEq(receiver.publisher_count(), 1);
 
         assertEq(address(pythLazer).balance, fee);
         assertEq(address(receiver).balance, 0);