fix signature

[bytom/bytom-java-sdk.git] / tx-signer / src / main / java / io / bytom / offline / api / BaseInput.java

diff --git a/tx-signer/src/main/java/io/bytom/offline/api/BaseInput.java b/tx-signer/src/main/java/io/bytom/offline/api/BaseInput.java
index 4963549..6b909a7 100644 (file)
--- a/tx-signer/src/main/java/io/bytom/offline/api/BaseInput.java
+++ b/tx-signer/src/main/java/io/bytom/offline/api/BaseInput.java
@@ -70,6 +70,9 @@ public abstract class BaseInput {
         if (program == null) {
             throw new IllegalArgumentException("the program id of input must be specified.");
         }
+        if (keyIndex == null) {
+            throw new IllegalArgumentException("the key index of input must be specified.");
+        }
         if (witnessComponent.getRootPrivateKey() == null) {
             throw new IllegalArgumentException("the root private key of input must be specified.");
         }