Kadena support (#650)

* kadena support

* add kadena mempool endpoits

* createQuorumFor fix

src/test/kotlin/io/emeraldpay/dshackle/upstream/kadena/KadenaLowerBoundStateDetectorTest.kt

@@ -0,0 +1,23 @@
+package io.emeraldpay.dshackle.upstream.kadena
+
+import io.emeraldpay.dshackle.Chain
+import io.emeraldpay.dshackle.upstream.lowerbound.LowerBoundData
+import io.emeraldpay.dshackle.upstream.lowerbound.LowerBoundType
+import org.junit.jupiter.api.Test
+import reactor.test.StepVerifier
+import java.time.Duration
+
+class KadenaLowerBoundStateDetectorTest {
+
+    @Test
+    fun `kadena lower block is 1`() {
+        val detector = KadenaLowerBoundStateDetector(Chain.KADENA__MAINNET)
+
+        StepVerifier.withVirtualTime { detector.detectLowerBound() }
+            .expectSubscription()
+            .expectNoEvent(Duration.ofSeconds(15))
+            .expectNext(LowerBoundData(1, LowerBoundType.STATE))
+            .thenCancel()
+            .verify(Duration.ofSeconds(3))
+    }
+}