Due to the lack of usage, the Java SDK has been deprecated. However our RESTful APIs are extremely easy to integrate with any good HTTP client library.
Java SDK for BlockCypher
May requires the following dependencies to be added to your project:
- org.glassfish.jersey.core -> jersey-client 2.9
- javax.ws.rs -> javax.ws.rs-api 2.0.1
- com.madgag -> sc-light-jdk15on 1.47.0.3
- Get an existing transaction with a given hash:
// Choose API version / currency / network / token, here v1 on Bitcoin's testnet network
BlockCypherContext context = new BlockCypherContext("v1", "btc", "test3", "YOURTOKEN");
String txHash = "09a228c6cf72989d81cbcd3a906dcb1d4b4a4c1d796537c34925feea1da2af35"
Transaction transaction = context.getTransactionService().getTransaction(txHash);
System.out.println("Transaction is confirmed? " + transaction.getConfirmed());
System.out.println("Transaction fees are: " + transaction.getFees());It will print the following:
Transaction is confirmed? 2014-08-03T15:52:11Z
Transaction fees are: 0
- Create a transaction of 500000 satoshis from address mvYwMT3aZ5jNcRNNjv7ckxjbqMDtvQbAHz to address n3hDuRYeYaeV4aEBqYF9byMK5B2c3tR1nB
BlockCypherContext context = new BlockCypherContext("v1", "btc", "test3", "YOURTOKEN");
// WIF Format of your private Key
String myPrivateKey = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
IntermediaryTransaction unsignedTx = context.getTransactionService()
.newTransaction(
new ArrayList<String>(Arrays.asList("mvYwMT3aZ5jNcRNNjv7ckxjbqMDtvQbAHz")),
new ArrayList<String>(Arrays.asList("n3hDuRYeYaeV4aEBqYF9byMK5B2c3tR1nB")),
500000
);
SignUtils.signWithBase58KeyWithPubKey(unsignedTx, myPrivateKey);
Transaction tx = context.getTransactionService().sendTransaction(unsignedTx);
System.out.println("Sent transaction: " + GsonFactory.getGsonPrettyPrint().toJson(tx));It will print the following:
Sent transaction:
{
"hash": "219e58e159851626b728a10d8f2aedcfca387dd4371242f421be27f70f19585a",
"block_height": -1,
"addresses": [
"mvYwMT3aZ5jNcRNNjv7ckxjbqMDtvQbAHz",
"n3hDuRYeYaeV4aEBqYF9byMK5B2c3tR1nB"
],
"total": 89410000,
"fees": 0,
"relayed_by": "127.0.0.1:50987",
"confirmed": "0001-01-01T00:00:00Z",
"received": "2014-09-04T15:23:43.95376663Z",
"ver": 1,
"lock_time": 0,
"vin_sz": 1,
"vout_sz": 2,
"confirmations": 0,
"inputs": [
{
"prev_hash": "075f42cabe7eb01efd905d1ca0cb9fa23dd46db0658cd92c0198ef38814999f5",
"output_index": 3,
"script": "483045022100cca2901981d1c1840830b261963814eb1f14c56627e2a171b07a35ad44d49fbe0220485909ab2b79017861444840efce615e63a0d79fd1b69ef88c3ec00f1af255b5012102b93edbd6aa7df3510a1e76d355428f382e5a25e167560eea34055f6f98d6bae4",
"output_value": 89410000,
"addresses": [
"mvYwMT3aZ5jNcRNNjv7ckxjbqMDtvQbAHz"
],
"script_type": "pay-to-pubkey-hash"
}
],
"outputs": [
{
"value": 500000,
"script": "76a914f343f510e12156df80fee18ea1a319002f55747788ac",
"spent_by": "",
"addresses": [
"n3hDuRYeYaeV4aEBqYF9byMK5B2c3tR1nB"
],
"script_type": "pay-to-pubkey-hash"
},
{
"value": 88910000,
"script": "76a914a4e9eecbbfd050cb2d47eb0452a97ccb607f53c788ac",
"spent_by": "",
"addresses": [
"mvYwMT3aZ5jNcRNNjv7ckxjbqMDtvQbAHz"
],
"script_type": "pay-to-pubkey-hash"
}
]
}- Embed an OP_RETURN into the testnet blockchain and retrieve the resulting transaction hash:
BlockCypherContext context = new BlockCypherContext("v1", "btc", "test3", "YOURTOKEN");
NullData sentNullData = context.getTransactionService().sendNullData(new NullData("hello there", "string"));
System.out.println("Transaction hash of data embed: " + sentNullData.getHash());
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