diff --git a/settings.gradle.kts b/settings.gradle.kts
index 9272dd5..e1e0baa 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -18,5 +18,5 @@ rootProject.name = "Rpc Core"
 include(":rpccore")
 include(":okiodriver")
 include(":ktordriver")
-include(":solana")
+include(":solanaclient")
 
diff --git a/solana/build.gradle.kts b/solanaclient/build.gradle.kts
similarity index 100%
rename from solana/build.gradle.kts
rename to solanaclient/build.gradle.kts
diff --git a/solana/src/commonMain/kotlin/com/solana/rpc/SolanaRpcClient.kt b/solanaclient/src/commonMain/kotlin/com/solana/rpc/SolanaRpcClient.kt
similarity index 69%
rename from solana/src/commonMain/kotlin/com/solana/rpc/SolanaRpcClient.kt
rename to solanaclient/src/commonMain/kotlin/com/solana/rpc/SolanaRpcClient.kt
index 0dcac88..a983235 100644
--- a/solana/src/commonMain/kotlin/com/solana/rpc/SolanaRpcClient.kt
+++ b/solanaclient/src/commonMain/kotlin/com/solana/rpc/SolanaRpcClient.kt
@@ -15,6 +15,7 @@ import kotlinx.serialization.builtins.nullable
 import kotlinx.serialization.builtins.serializer
 import kotlinx.serialization.json.*
 import kotlin.math.pow
+import kotlin.random.Random
 import kotlin.time.Duration.Companion.seconds
 import kotlin.time.TimeSource
 
@@ -22,31 +23,31 @@ class SolanaRpcClient(val rpcDriver: Rpc20Driver) {
 
     constructor(url: String, networkDriver: HttpNetworkDriver): this(Rpc20Driver(url, networkDriver))
 
-    suspend fun requestAirdrop(address: SolanaPublicKey, amountSol: Float) =
+    suspend fun requestAirdrop(address: SolanaPublicKey, amountSol: Float, requestId: String? = null) =
         rpcDriver.makeRequest(
-            AirdropRequest(address, (amountSol*10f.pow(9)).toLong()),
+            AirdropRequest(address, (amountSol*10f.pow(9)).toLong(), requestId),
             String.serializer()
         )
 
-    suspend fun getBalance(address: SolanaPublicKey, commitment: String = "confirmed") =
-        rpcDriver.makeRequest(BalanceRequest(address, commitment), SolanaResponseSerializer(Long.serializer()))
+    suspend fun getBalance(address: SolanaPublicKey, commitment: String = "confirmed", requestId: String? = null) =
+        rpcDriver.makeRequest(BalanceRequest(address, commitment, requestId), SolanaResponseSerializer(Long.serializer()))
 
-    suspend fun getMinBalanceForRentExemption(size: Long, commitment: String? = null) =
-        rpcDriver.makeRequest(RentExemptBalanceRequest(size, commitment), Long.serializer())
+    suspend fun getMinBalanceForRentExemption(size: Long, commitment: String? = null, requestId: String? = null) =
+        rpcDriver.makeRequest(RentExemptBalanceRequest(size, commitment, requestId), Long.serializer())
 
-    suspend fun getLatestBlockhash() =
-        rpcDriver.makeRequest(LatestBlockhashRequest(), SolanaResponseSerializer(BlockhashResponse.serializer()))
+    suspend fun getLatestBlockhash(commitment: String? = null, minContextSlot: Long? = null, requestId: String? = null) =
+        rpcDriver.makeRequest(LatestBlockhashRequest(commitment, minContextSlot, requestId), SolanaResponseSerializer(BlockhashResponse.serializer()))
 
-    suspend fun sendTransaction(transaction: Transaction) =
-        rpcDriver.makeRequest(SendTransactionRequest(transaction), String.serializer())
+    suspend fun sendTransaction(transaction: Transaction, skipPreflight: Boolean = false, requestId: String? = null) =
+        rpcDriver.makeRequest(SendTransactionRequest(transaction, skipPreflight, requestId), String.serializer())
 
     suspend fun sendAndConfirmTransaction(transaction: Transaction) =
         sendTransaction(transaction).apply {
             result?.let { confirmTransaction(it) }
         }
 
-    suspend fun getSignatureStatuses(signatures: List<String>) =
-        rpcDriver.makeRequest(SignatureStatusesRequest(signatures),
+    suspend fun getSignatureStatuses(signatures: List<String>, searchTransactionHistory: Boolean = false, requestId: String? = null) =
+        rpcDriver.makeRequest(SignatureStatusesRequest(signatures, searchTransactionHistory, requestId),
             SolanaResponseSerializer(ListSerializer(SignatureStatus.serializer().nullable))
         )
 
@@ -67,7 +68,7 @@ class SolanaRpcClient(val rpcDriver: Rpc20Driver) {
             // wait a bit before retrying
             val mark = timeSource.markNow()
             var inc = 0
-            while(timeSource.markNow() - mark < 0.3.seconds && isActive) { inc++ }
+            while(mark.elapsedNow() < 0.3.seconds && isActive) { inc++ }
 
             if (!isActive) break // breakout after timeout
         }
@@ -76,8 +77,11 @@ class SolanaRpcClient(val rpcDriver: Rpc20Driver) {
     }
 
     //region Requests
-    class AirdropRequest(address: SolanaPublicKey, lamports: Long, requestId: String = "1")
-        : JsonRpc20Request(
+    sealed class SolanaRpcRequest(method: String, params: JsonElement?, id: String? = null)
+        : JsonRpc20Request(method, params, id ?: "$method-${Random.nextInt(100000000, 999999999)}")
+
+    class AirdropRequest(address: SolanaPublicKey, lamports: Long, requestId: String? = null)
+        : SolanaRpcRequest(
         method = "requestAirdrop",
         params = buildJsonArray {
             add(address.base58())
@@ -86,8 +90,8 @@ class SolanaRpcClient(val rpcDriver: Rpc20Driver) {
         id = requestId
     )
 
-    class BalanceRequest(address: SolanaPublicKey, commitment: String = "confirmed", requestId: String = "1")
-        : JsonRpc20Request(
+    class BalanceRequest(address: SolanaPublicKey, commitment: String = "confirmed", requestId: String? = null)
+        : SolanaRpcRequest(
         method = "getBalance",
         params = buildJsonArray {
             add(address.base58())
@@ -98,19 +102,22 @@ class SolanaRpcClient(val rpcDriver: Rpc20Driver) {
         requestId
     )
 
-    class LatestBlockhashRequest(commitment: String = "confirmed", requestId: String = "1")
-        : JsonRpc20Request(
+    class LatestBlockhashRequest(commitment: String? = null, minContextSlot: Long? = null, requestId: String? = null)
+        : SolanaRpcRequest(
         method = "getLatestBlockhash",
         params = buildJsonArray {
-            addJsonObject {
-                put("commitment", commitment)
+            if (commitment != null || minContextSlot!= null) {
+                addJsonObject {
+                    commitment?.let { put("commitment", commitment) }
+                    minContextSlot?.let { put("minContextSlot", minContextSlot) }
+                }
             }
         },
         requestId
     )
 
-    class SendTransactionRequest(transaction: Transaction, skipPreflight: Boolean = true, requestId: String = "1")
-        : JsonRpc20Request(
+    class SendTransactionRequest(transaction: Transaction, skipPreflight: Boolean = false, requestId: String? = null)
+        : SolanaRpcRequest(
         method = "sendTransaction",
         params = buildJsonArray {
             add(Base58.encodeToString(transaction.serialize()))
@@ -121,8 +128,8 @@ class SolanaRpcClient(val rpcDriver: Rpc20Driver) {
         requestId
     )
 
-    class SignatureStatusesRequest(transactionIds: List<String>, searchTransactionHistory: Boolean = false, requestId: String = "1")
-        : JsonRpc20Request(
+    class SignatureStatusesRequest(transactionIds: List<String>, searchTransactionHistory: Boolean = false, requestId: String? = null)
+        : SolanaRpcRequest(
         method = "getSignatureStatuses",
         params = buildJsonArray {
             addJsonArray { transactionIds.forEach { add(it) } }
@@ -133,8 +140,8 @@ class SolanaRpcClient(val rpcDriver: Rpc20Driver) {
         requestId
     )
 
-    class RentExemptBalanceRequest(size: Long, commitment: String? = null, requestId: String = "1")
-        : JsonRpc20Request(
+    class RentExemptBalanceRequest(size: Long, commitment: String? = null, requestId: String? = null)
+        : SolanaRpcRequest(
         method = "getMinimumBalanceForRentExemption",
         params = buildJsonArray {
             add(size)
diff --git a/solana/src/commonMain/kotlin/com/solana/serializers/SolanaResponseSerializer.kt b/solanaclient/src/commonMain/kotlin/com/solana/serializers/SolanaResponseSerializer.kt
similarity index 100%
rename from solana/src/commonMain/kotlin/com/solana/serializers/SolanaResponseSerializer.kt
rename to solanaclient/src/commonMain/kotlin/com/solana/serializers/SolanaResponseSerializer.kt
diff --git a/solana/src/commonTest/kotlin/com/solana/rpc/RpcClientTests.kt b/solanaclient/src/commonTest/kotlin/com/solana/rpc/RpcClientTests.kt
similarity index 98%
rename from solana/src/commonTest/kotlin/com/solana/rpc/RpcClientTests.kt
rename to solanaclient/src/commonTest/kotlin/com/solana/rpc/RpcClientTests.kt
index 78b1b22..f30c25b 100644
--- a/solana/src/commonTest/kotlin/com/solana/rpc/RpcClientTests.kt
+++ b/solanaclient/src/commonTest/kotlin/com/solana/rpc/RpcClientTests.kt
@@ -104,7 +104,7 @@ class RpcClientTests {
                 Transaction(listOf(sig), this)
             }
 
-        val response = rpc.sendTransaction(transaction)
+        val response = rpc.sendTransaction(transaction, skipPreflight = true)
 
         // then
         assertNull(airdropResponse.error)