Fixed paramter handling for smart contract invocations.

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - Introduced Cis2Client for interfacing with CIS2 compliant smart contracts.
 - Support for deserializing contract update transactions.
+- Fix a bug where contract invocations used wrong format for parameters.
 
 ## 6.1.0
 - Purge remaining usages of V1 GRPC API.

concordium-sdk/src/main/java/com/concordium/sdk/ClientV2MapperExtensions.java

@@ -1652,7 +1652,7 @@ static com.concordium.grpc.v2.ReceiveName to(ReceiveName receiveName) {
 
     static com.concordium.grpc.v2.Parameter to(Parameter parameter) {
         return com.concordium.grpc.v2.Parameter.newBuilder()
-                .setValue(ByteString.copyFrom(parameter.getBytes()))
+                .setValue(ByteString.copyFrom(parameter.getBytesForContractInvocation()))
                 .build();
     }
 

concordium-sdk/src/main/java/com/concordium/sdk/transactions/Parameter.java

@@ -1,5 +1,6 @@
 package com.concordium.sdk.transactions;
 
+import com.concordium.sdk.requests.smartcontracts.InvokeInstanceRequest;
 import com.concordium.sdk.responses.ProtocolVersion;
 import com.concordium.sdk.transactions.smartcontracts.SchemaParameter;
 import com.concordium.sdk.types.UInt16;
@@ -52,6 +53,18 @@ public byte[] getBytes() {
         return buffer.array();
     }
 
+    /**
+     * Get the parameter bytes for contract invocation i.e. off-chain operation.
+     * This differs from {@link Parameter#getBytes()} as this does not prepend the
+     * returned byte array with the length of the parameters.
+     *
+     * This function should be only be used for {@link com.concordium.sdk.ClientV2#invokeInstance(InvokeInstanceRequest)} calls.
+     * @return the parameters
+     */
+    public byte[] getBytesForContractInvocation() {
+        return this.bytes;
+    }
+
     /**
      * Constructs a {@link Parameter} from the provided {@link SchemaParameter}.
      * Provided {@link SchemaParameter} must be initialized using {@link SchemaParameter#initialize()} beforehand.