# TrueBlocks/trueblocks-core

The main repository for the TrueBlocks system

Repository: https://github.com/TrueBlocks/trueblocks-core
Canonical: https://ross.abutalabs.com/products/trueblocks-core
Homepage: https://trueblocks.io
Language: Shell
License: GPL-3.0
License Family: copyleft
Topics: ethereum, blockchain, command-line-tools, indexing
Last push: 2026-07-18T19:20:25+00:00

## Health v2 (maintenance only)
Score: 79/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 93, release rhythm 50, longevity 100
- inputs: {"age_days": 3439, "days_push": 46, "days_rel": 339, "gap_med": 9, "n_releases_24m": 14}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1095, forks 222 (observed 2026-08-28T04:03:34.040754+00:00)

## What it is
TrueBlocks (chifra) is a local-first command-line tool suite and optional API server that indexes address appearances on Ethereum and other EVM-compatible chains, enabling fast, private access to transaction histories without third-party explorers. It includes the Unchained Index, binary caching, log decoding, and reconciled accounting exports.

## Use cases
- extract all transactions for an ethereum address locally
- export reconciled accounting statements for crypto tax reporting
- decode smart contract event logs with human-readable names
- index address appearances across an EVM blockchain
- query token balances and ERC-20 holdings from the command line
- run a local API server for blockchain data instead of using Etherscan
- analyze smart contract activity as a data scientist

## When to choose
- you need private, permissionless access to Ethereum transaction data without relying on hosted explorers
- you require accurate, decimal-precise accounting of ETH and token balances
- you want fast repeated queries over full chain history via a local index
- you prefer command-line or local API workflows for blockchain analytics

## When to avoid
- you need a hosted or managed blockchain data service with zero setup
- you run Windows, which is not supported
- you only need occasional lookups and don't want to run your own node or scrape the index
- you need non-EVM blockchains like Bitcoin or Solana

## Facets
- artifact type: cli-tool
- maturity: active
- function: search-engine, cli, http-server, api-framework, data-science, analytics
- domain: blockchain, fintech, developer-tools, analytics
- platform: cli, go, self-hosted
- tags: ethereum, evm, blockchain-indexing, chifra, unchained-index, accounting, web3, local-first, privacy, indexing, cryptocurrency, command-line, data-engineering, linux, macos, docker

## Member repositories
- TrueBlocks/trueblocks-core (main) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:34.040754+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:47:14.274610+00:00, confidence not recorded.
  - readme: https://github.com/TrueBlocks/trueblocks-core (fetched 2026-08-28T04:03:34.040754+00:00, sha 294e87cefb16)
  - homepage: https://trueblocks.io (fetched 2026-08-29T12:50:12.473991+00:00, sha 202535e959bc)
  - site_page: https://trueblocks.io/docs (fetched 2026-08-29T12:50:12.483707+00:00, sha b251e67962ae)
  - site_page: https://trueblocks.io/docs/install/install-core (fetched 2026-08-29T12:50:12.489338+00:00, sha 26d3195f1aaf)
  - site_page: https://trueblocks.io/faq (fetched 2026-08-29T12:50:12.486193+00:00, sha 280a8cec2d64)
- Data as of 2026-08-30T08:39:29.467469+00:00.