[Notice] Klaytn SDK caver-java v1.6.1 Released

Today we are excited to announce that the caver-java (Java Software Development Kit of Klaytn) v1.6.1 has just been released.

caver.contract of caver-js v1.6.1 supports the fee delegation model. Users can use fee delegation in caver.contract by additionally defining fields related to the fee delegation in the options object delivered as a parameter of the function or in contract.options. In addition, the sign and signAsFeePayer functions are additionally provided to obtain a signed transaction to deploy or execute a specific smart contract. The create function provided for the usability of Klaytn SDK is also available in caver-js v1.6.1.

caver.contract of caver-java v1.6.1 supports the fee delegation model. Users can use fee delegation in caver.contract by additionally defining fields related to the fee delegation in the SendOptions object delivered as a parameter of the method or in the defaultSendOptions field in caver.contract.

In addition, the sign and signAsFeePayer methods are additionally provided to obtain a signed transaction to deploy or execute a specific smart contract.

Supported additional fields for fee delegation in the SendOptions class

• feeDelegation, feePayer and feeRatio can be additionally defined in the SendOptions object where the values used for creating a transaction are defined.

Supported signing functions in caver.contract

• In caver-java v1.6.1, The sign and signAsFeePayer methods are additionally supported in the Contract class and the ContractMethod class.

Supported fee-delegation model in caver.contract

• In caver-js v1.6.1, you can use fee delegation in caver.contract by additionally defining fields related to the fee delegation in the SendOptions object delivered as a parameter of the method or in the defaultSendOptions field in caver.contract.

Also, in caver-java v1.6.1, like caver-js, another library of Klaytn SDK, the Wrapper class of main class in each package has been implemented to support usability such as caver.[module name].[function_name].

This Wrapper class provides two main functions:

• Creates an instance of the base class, which can be mapped to the wrapper class, through the create method.
• Wraps the static method of the base class and provides it in the form of an instance method.

Components accessible through the Caver instance are as follows.

• Account: caver.account
  AccountKey: caver.account.accountKey
• Transaction: caver.transaction
• ABI: caver.abi
• Contract: caver.contract
• KCT: caver.kct
  KIP7: caver.kct.kip7
  KIP17: caver.kct.kip17
  KIP37: caver.kct.kip37
• Utils: caver.utils
• IPFS: caver.ipfs

For detailed information about caver-java v1.6.1, please refer to https://github.com/klaytn/caver-java/releases/tag/v1.6.1.

To download caver-java, please visit https://search.maven.org/artifact/com.klaytn.caver/core/1.6.1/jar