From d1c4c4b56f065d28cadf90370e0709294cfcdbc4 Mon Sep 17 00:00:00 2001
From: xiaoyong931011 <15274802129@163.com>
Date: Mon, 10 Oct 2022 16:16:32 +0800
Subject: [PATCH] 20220707
---
src/main/java/cc/mrbird/febs/dapp/chain/EthService.java | 33 +++++++++++++++++++++++++++++++++
1 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/src/main/java/cc/mrbird/febs/dapp/chain/EthService.java b/src/main/java/cc/mrbird/febs/dapp/chain/EthService.java
index 59e777d..204202e 100644
--- a/src/main/java/cc/mrbird/febs/dapp/chain/EthService.java
+++ b/src/main/java/cc/mrbird/febs/dapp/chain/EthService.java
@@ -427,4 +427,37 @@
return "";
}
}
+
+ @Override
+ public String ownerOfNft(Integer index) {
+ try {
+ String methodName = "ownerOf";
+ List<Type> inputParameters = new ArrayList<>();
+ List<TypeReference<?>> outputParameters = new ArrayList<>();
+ Uint256 uint256 = new Uint256(index);
+ inputParameters.add(uint256);
+ TypeReference<Address> typeReference = new TypeReference<Address>() {
+ };
+ outputParameters.add(typeReference);
+ Function function = new Function(methodName, inputParameters, outputParameters);
+ String data = FunctionEncoder.encode(function);
+ Transaction transaction = Transaction.createEthCallTransaction(null, contractAddress, data);
+
+ EthCall ethCall;
+ String address = "";
+ try {
+ ethCall = web3j.ethCall(transaction, DefaultBlockParameterName.LATEST).send();
+ List<Type> results = FunctionReturnDecoder.decode(ethCall.getValue(), function.getOutputParameters());
+ address = (String) results.get(0).getValue();
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+
+ return address;
+
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ return "";
+ }
}
--
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