Ontology Java SDK User Guide

Version 0.7.0

Attest Attestation

Step

1. SDK init

String ip = "http://127.0.0.1";
String restUrl = ip + ":" + "20384";
String rpcUrl = ip + ":" + "20386";
String wsUrl = ip + ":" + "20385";
OntSdk wm = OntSdk.getInstance();
wm.setRpc(rpcUrl);
wm.setRestful(restUrl);
wm.setDefaultConnect(wm.getRestful());
wm.openWalletFile("RecordTxDemo.json");
wm.setCodeAddress("803ca638069742da4b6871fe3d7f78718eeee78a");

Note: codeAddress is the address of the record contract。

1. attest data onto the blockchain

String res = ontSdk.getRecordTx().sendPut("TA9WXpq7GNAc2D6gX9NZtCdybRq8ehGUxw","passwordtest","key","value");

Note: The key represents the key of the data value stored in the chain, which can later be stored according to the key.

1. Get data from the chain by the key

String res = ontSdk.getRecordTx().sendGet("TA9WXpq7GNAc2D6gX9NZtCdybRq8ehGUxw","passwordtest","key");

1. description of response

{"Data":{"Algrithem":"SM2","Hash":"","Text":"value","Signature":""},"CAkey":"","SeqNo":"","Timestamp":0}

Note: Algrithem:encryption algorithm name，Hash:record hash，Text:stored value，Signature:signing the record hash，CAkey:initiator identity flag，SeqNo:transaction serial number，Timestamp:external time stamp