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Release Notes for Klaytn v1.5.0

New Features

  • 상태 마이그레이션 (
    • 불필요하고 오래된 상태/스토리지 트리를 제거하여 Klaytn 노드(Cypress) 스토리지 용량을 75%(800 GB -> 200 GB) 절약하는 새로운 JSON-RPC API
      • admin.startStateMigration()
      • admin.stopStateMigration()
      • admin.stateMigrationStatus
    • Klaytn node currently requires about 1TB of storage space. This size of storage was a burdensome for efficient node operation, and the state migration came here to relieve this. The state migration removes the stale state/storage trie nodes which are unnecessary for new block generation and validation. Before starting a state migration, stakingInfo is saved in a database to get stakingInfo without the staled state after the state migration.
  • Warm-up trie node cache (
    • New JSON-RPC APIs to speed up the block processing by iterating the latest state trie and caching it
      • debug.startWarmUp()
      • debug.stopWarmUp()
    • Until now, Klaytn node had to continuously access a database for processing a block due to uncached state trie nodes, which results in the delay in block processing. The introduced "warm-up" feature reduces this delay by iterating the last state trie and caching it.
  • Import blocks from String (
    • Importing blocks was available only with a file. Importing blocks from a string is required for some use cases.
    • New JSON-RPC APIs
      • admin.importChainFromString()
  • Fastcache (
    • Fastcache as trie node cache with the autoscaled cache size, reducing memory consumption compared to Bigcache


  • Parameterizes triesInMemory and maxRequestContentLength (,
  • Uses cached state database in TraceBlock (
  • Improves consensus logic
    • Adds unit test code (,
    • Refactors SubList/SubListWithProposer (
    • Prevents validators from sending consensus message if they are not in committee (
    • Istanbul message handler now checks whether the sender is a member of the committee or not (
  • Prevents commit twice when a node stops (
  • Refactors staking manager (
  • Builds and publishes public docker image (
  • Improves Trace API
    • Adds txHash into txTraceResult (
    • tracer now supports CREATE2 (
    • tracer now reports transaction revert information (
  • Allows DNS address string to start with numeric character for encoding URL (
  • Removes vendor directory (


  • Reorganizes the stop sequence of blockchain module (
  • Fixes computeStateDB to not compute for non-existing block number (
  • Prevents files to be overwritten via admin.exportChain (
Last modified 4mo ago