# v1.7.0
## Package Downloads
### RPM
Cypress Packages
* [kcnd-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kcnd-v1.7.0-0.el7.x86_64.rpm)
* [kpnd-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kpnd-v1.7.0-0.el7.x86_64.rpm)
* [kend-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kend-v1.7.0-0.el7.x86_64.rpm)
Baobab Packages
* [kcnd-baobab-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kcnd-baobab-v1.7.0-0.el7.x86_64.rpm)
* [kpnd-baobab-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kpnd-baobab-v1.7.0-0.el7.x86_64.rpm)
* [kend-baobab-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kend-baobab-v1.7.0-0.el7.x86_64.rpm)
Common Packages
* [kscnd-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kscnd-v1.7.0-0.el7.x86_64.rpm)
* [kspnd-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kspnd-v1.7.0-0.el7.x86_64.rpm)
* [ksend-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/ksend-v1.7.0-0.el7.x86_64.rpm)
* [kbnd-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kbnd-v1.7.0-0.el7.x86_64.rpm)
* [kgen-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/kgen-v1.7.0-0.el7.x86_64.rpm)
* [homi-v1.7.0-0.el7.x86\_64.rpm](https://packages.klaytn.net/klaytn/v1.7.0/homi-v1.7.0-0.el7.x86_64.rpm)
### Linux
Cypress Packages
* [kcn-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kcn-v1.7.0-0-linux-amd64.tar.gz)
* [kpn-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kpn-v1.7.0-0-linux-amd64.tar.gz)
* [ken-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/ken-v1.7.0-0-linux-amd64.tar.gz)
Baobab Packages
* [kcn-baobab-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kcn-baobab-v1.7.0-0-linux-amd64.tar.gz)
* [kpn-baobab-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kpn-baobab-v1.7.0-0-linux-amd64.tar.gz)
* [ken-baobab-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/ken-baobab-v1.7.0-0-linux-amd64.tar.gz)
Common Packages
* [kscn-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kscn-v1.7.0-0-linux-amd64.tar.gz)
* [kspn-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kspn-v1.7.0-0-linux-amd64.tar.gz)
* [ksen-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/ksen-v1.7.0-0-linux-amd64.tar.gz)
* [kbn-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kbn-v1.7.0-0-linux-amd64.tar.gz)
* [kgen-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kgen-v1.7.0-0-linux-amd64.tar.gz)
* [homi-v1.7.0-0-linux-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/homi-v1.7.0-0-linux-amd64.tar.gz)
### MacOS
Cypress Packages
* [kcn-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kcn-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [kpn-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kpn-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [ken-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/ken-v1.7.0-0-darwin-10.10-amd64.tar.gz)
Baobab Packages
* [kcn-baobab-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kcn-baobab-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [kpn-baobab-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kpn-baobab-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [ken-baobab-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/ken-baobab-v1.7.0-0-darwin-10.10-amd64.tar.gz)
Common Packages
* [kscn-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kscn-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [kspn-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kspn-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [ksen-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/ksen-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [kbn-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kbn-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [kgen-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/kgen-v1.7.0-0-darwin-10.10-amd64.tar.gz)
* [homi-v1.7.0-0-darwin-10.10-amd64.tar.gz](https://packages.klaytn.net/klaytn/v1.7.0/homi-v1.7.0-0-darwin-10.10-amd64.tar.gz)
### Windows
* Not supported yet
## Release Notes
Klaytn v1.7.0 contains important changes for the protocol upgrade which may result in incompatible changes like Ethereum Hard-forks. This version enables the protocol upgrade for Baobab testnet at block #75373312, estimated for November 15th. Cypress mainnet will be subject to the same protocol upgrade in the next version.
### 프로토콜 업그레이트 기능
* Introduces Ethereum's Istanbul hard-fork items
* EIP-152: Introduces a precompiled contract, BLAKE2F at address 0x09 (#960 #1010)
* EIP-1108: Reprices the gas cost of precompiled contracts, ECADD, ECMUL, and Pairing Check (#987)
* EIP-1344: Introduces a new opcode, CHAINID at 0x46 (#952)
* EIP-1844: Introduces a new opcode, SELFBALANCE at 0x47. It reprices the gas cost of SLOAD, BALANCE, and EXTCODEHASH (#958)
* EIP-2200: Changes the gas metering algorithm of the opcode SSTORE (#996)
* Moves addresses of Klaytn precompiled contracts (#912)
* vmLog: 0x09 → 0x3fd
* feePayer: 0x0a → 0x3fe
* validateSender: 0x0b → 0x3ff
* Contracts deployed before the incompatible change activation will continue to work as before even for the transaction executed after the activation.
* Changes the gas calculation logic for the data field of legacy type transactions (#986)
* With this change, the same data fee calculation logic will be applied for all transaction types.
* Enhances the validation and gas calculation logic of multi-sig transactions (#1001)
* The signature verification fee for multi-sig transactions is in proportion to the number of unique signatures.
* Transactions that contain more signatures than the maximum number of the account's accountKey are invalid.
* The transaction which contains at least one invalid signature is invalid.
* Reduces computation costs of over-priced opcodes (#1033)
* Affected opcodes: addmod, mulmod, not, xor, shl, shr, and sar.
* Introduces a minimum staking amount for validators as a governance item (#920 #963 #1023 #1024 #1034)
* If a validator doesn’t stake enough KLAY, the node will not be selected as a proposer or a committee member.
* Randomly selects new committee members on every round change (#997)
### New Features
* Introduces two klay APIs that return a block header: klay\_getHeaderByNumber and klay\_getHeaderByHash (#975)
* Introduces two istanbul APIs that return demoted validators (#974)
* istanbul\_getDemotedValidators: Returns the demoted validators at a given block number.
* istanbul\_getDemotedValidatorsAtHash: Returns the demoted validators at a given block hash.
* A demoted validator is one of the validators but cannot be a proposer or committee member due to insufficiently staking KLAY.
* Introduces the dumpgenesis command which returns the genesis block in JSON format (#992)
* Introduces CustomRetryer for DynamoS3DB to retry requests for all error cases (#982)
* Introduces experimental flags related to block generation time (#989)
* BlockGenerationIntervalFlag: Determines the block generation interval between two successive blocks (Only for CNs)
* BlockGenerationTimeLimitFlag: Sets the vm execution time limit during block generation (Only for CNs)
* OpcodeComputationCostLimitFlag: Sets the computation cost limit for a transaction
### Improvements
* Changed the block parameter type from blockNumber or blockHash to blockNumberOrHash (#975)
* Affected APIs: klay\_accountCreated, klay\_getAccount, klay\_getAccountKey, klay\_getBalance, klay\_getCode, klay\_getTransactionCount, klay\_isContractAccount, klay\_getBlockByNumber, klay\_getBlockTransactionCountByNumber, klay\_getBlockWithConsensusInfoByNumber, klay\_getCommittee, klay\_getCommitteeSize, klay\_getCouncil, klay\_getCouncilSize, klay\_getStorageAt, klay\_getLogs, klay\_newFilter, klay\_call, klay\_getTransactionByBlockNumberAndIndex, debug\_dumpBlock, debug\_getBlockRlp, debug\_printBlock, and governance\_itemsAt
* Added SetHeader method to Klaytn client (#1020)
* Utilized dirtyStorage more accurately (#993)
* Set the request body size limit of fastHttpServer with maxRequestContentlength (#1029)
* Enabled UseOpcodeComputationCost EVM option on debug API (#1035)
* Updated istanbul consensus engine to verify headers synchronously (#957)
* Enhanced the state migration feature to support non-single type DB (#954)
### Fixes
* Handled abnormal returns of state.NewForPrefetching (#1011)
* Fixed abnormal application of governance votes in edge cases (#1018)
### Miscellaneous
* Renamed two admin APIs (#971)
* admin\_startRPC → admin\_startHTTP
* admin\_stopRPC → admin\_stopHTTP
* Old names have been deprecated, but are still available.