Casper Java SDK

This project implements the SDK to interact with a Casper Node. It wraps the Json-RPC requests and maps the results to Java objects.

Dependencies

• Java 8
• Gradle
• crypto-keys

Build instructions

./gradlew build

Including the library

Using gradle:

implementation 'com.syntifi.casper:casper-sdk:0.2.1'

Using maven:

<dependency>
  <groupId>com.syntifi.casper</groupId>
  <artifactId>casper-sdk</artifactId>
  <version>0.2.1</version>
</dependency>

How to

1. Set-up a connection

casperService = CasperService.usingPeer("127.0.0.1","7777");

2. Query a block

Retrieve block info by a block identifier

Last block

JsonBlockData result = casperService.getBlock();

By height

JsonBlockData result = casperService.getBlock(new HeightBlockIdentifier(1234));

By hash

JsonBlockData blockData = casperService.getBlock(new HashBlockIdentifier("--hash--"));

3. Query transfers

Retrieve block transfers by a block identifier

Last block

TransferData transferData = casperService.getBlockTransfers();

By block height

TransferData transferData = casperService.getBlockTransfers(new HeightBlockIdentifier(1234));

By block hash

TransferData transferData = casperService.getBlockTransfers(new HashBlockIdentifier("--hash--"));

3. Query state root hash

Retrieve the state root hash given the BlockIdentifier

Last block

StateRootHashData stateRootData = casperService.getStateRootHash();

By block height

StateRootHashData stateRootData = casperService.getStateRootHash(new HeightBlockIdentifier(1234));

By block hash

StateRootHashData stateRootData = casperService.getStateRootHash(new HashBlockIdentifier("--hash--"));

4. Query deploy

Get a Deploy from the network

DeployData deployData = casperService.getDeploy("--hash--");

5. Query peers

Get network peers data

PeerData peerData = casperService.getPeerData();

6. Query stored value

Retrieve a stored value from the network

StoredValueData result = casperService.getStateItem("--stateRootHash--", "key", Arrays.asList("The path components starting from the key as base"));

7. Get node status

Return the current status of the node

StatusData status = casperService.getStatus()

8. Get account info

Returns an Account from the network

By block height

AccountData account = casperService.getStateAccountInfo("--publicKey--", new HeightBlockIdentifier(1234));

By block hash

AccountData account = casperService.getStateAccountInfo("--publicKey--", new HashBlockIdentifier("--hash--"));

9. Get auction info

Returns the Auction info for a given block

By block height

AuctionData auction = casperService.getStateAuctionInfo(new HeightBlockIdentifier(1234));

By block hash

AuctionData auction = casperServiceMainnet.getStateAuctionInfo(new HashBlockIdentifier("--hash--"));

10. Get era info

Returns an EraInfo from the network

By block height

EraInfoData eraInfoData = casperService.getEraInfoBySwitchBlock(new HeightBlockIdentifier(1234));

By block hash

EraInfoData eraInfoData = casperService.getEraInfoBySwitchBlock(new HashBlockIdentifier("--hash--"));

11. Deploy

Transfering CSPR

Deploy deploy = CasperDeployService.buildTransferDeploy(from, to,
    BigInteger.valueOf(2500000000L), "casper-test",
    id, BigInteger.valueOf(100000000L), 1L, ttl, new Date(),
    new ArrayList<>());

DeployResult deployResult =  casperServiceTestnet.putDeploy(deploy);