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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog (modification: no type change headlines) and this project adheres to Semantic Versioning.

3.4.0 - 2019-02-06

Petersburg (aka constantinopleFix) as well as Goerli support/readiness by updating to a supporting ethereumjs-common version v1.1.0, PR #86

3.3.3 - 2019-01-03

  • Fixed a bug causing the iterate() method to fail when an older version levelup DB instance is passed, see PR #83

3.3.2 - 2018-12-20

  • Updated levelup dependency to level-mem v3.0.1, PR #75
  • Fix putBlock() edge case, PR #79
  • Replaced uses of deprecated new Buffer with Buffer.from, PR #80

3.3.1 - 2018-10-26

  • Replaced calls to BN.toBuffer() with BN.toArrayLike() so that ethereumjs-blockchain can run in a browser environment, PR #73

3.3.0 - 2018-10-19

  • Constantinople support when using block validation (set with opts.validate in constructor), update to a Constantinople-ready version of the ethereumjs-block dependency (>2.1.0), PR #71

3.2.1 - 2018-08-29

  • Fixed an issue with the iterator() function returning an error on end of block iteration instead of finish gracefully, PR #64
  • Updated ethereumjs-common dependency to v0.5.0 (custom chain support), PR #63

3.2.0 - 2018-08-13

  • Added support for setting network and performing hardfork-specific validation by integrating with ethereumjs-common, PR #59
  • Added Blockchain.putHeader() and Blockchain.putHeaders() functions to provide header-chain functionality (needed by ethereumjs-client), PR #59
  • Fixed a bug with caching, PR #59
  • Fixed error propagation in Blockchain.iterator(), PR #60

3.1.0 - 2018-05-24

  • New getLatestHeader() and getLatestBlock() methods for retrieving the latest header respectively full block in the canonical chain, PR #52
  • Fixed saveHeads() bug not storing the internal headHeader/headBlock header cursors to the DB, PR #52
  • Updated API docs

3.0.0 - 2018-05-18

This release comes with heavy internal changes bringing Geth DB compatibility to the ethereumjs-blockchain library. For a full list of changes and associated discussion see PR #47 (thanks to @vpulim for this amazing work!). To test iterating through your local Geth chaindata DB you can run the example in the README file.

This allows for various new use cases of the library in the areas of testing, simulation or running actual blockchain data from a Geth node through the VM. The Geth data model used is not compatible with the old format where chaindata and metadata have been stored separately on two leveldb instances, so it is not possible to load an old DB with the new library version (if this causes problems for you get in touch on GitHub or Gitter!).

Summary of the changes:

  • New unified constructor where detailsDB and blockDB are replaced by a single db reference
  • Deprecation of the getDetails() method now returning an empty object
  • td and height are not stored in the db as meta info but computed as needed
  • Block headers and body are stored under two separate keys
  • Changes have been made to properly rebuild the chain and number/hash mappings as a result of forks and deletions
  • A write-through cache has been added to reduce database reads
  • Similar to geth, we now defend against selfish mining vulnerability
  • Added many more tests to increase coverage to over 90%
  • Updated docs to reflect the API changes
  • Updated library dependencies

2.1.0 - 2017-10-11

  • Metro-Byzantium compatible
  • Updated ethereumjs-block dependency (new difficulty formula / difficulty bomb delay)

2.0.2 - 2017-09-19

  • Tightened dependencies to prevent the 2.0.x version of the library to break after ethereumjs Byzantium library updates

2.0.1 - 2017-09-14

  • Fixed severe bug adding blocks before blockchain init is complete

2.0.0 - 2017-01-01

  • Split db into blockDB and detailsDB (breaking)

1.4.2 - 2016-12-29

  • New getBlocks API method
  • Testing improvements

1.4.1 - 2016-03-01

  • Update dependencies to support Windows

1.4.0 - 2016-01-09

  • Bump dependencies

Older releases: