How to sign and send transaction

How to sign transaction

The how to sign transaction tells us how to sign ckb transaction.

Java SDK Examples

Java SDK includes some examples of building and signing transaction:

• Single private key and single signature transaction

• Single private key and single signature transaction with indexer to collect live cells

• Multiple private keys and single signature transaction

• Multiple private keys and multi-sig transaction

• Sending to multi-sig address transaction

There are some stages to send transaction：

• Collecting live cells (estimating transaction fee at the same time) CellCollector and CellCollectorWithIndexer

• Building transaction structure TransactionBuilder

• Signing transaction Secp256k1MultisigAllBuilder and Secp256k1SighashAllBuilder

• Calling send_transaction rpc to send transaction to ckb blockchain RPC Api