Blockchain explorer for Ethereum based network and a tool for inspecting and analyzing EVM based blockchains.

blockchain ethereum explorer elixir

History

Luke Imhoff 2a4223c2c6 Allow block numbers to exceed missing block search range by > 1 Fixes #1266 Issue #1266 was triggered when the recorded block number exceeded the reported max block number as can happen temporary when the node that gives the latest block number is farther behind than the node that gave the block data. The previous `Explorer.Chain.missing_block_number_ranges` query added in #1230 did not account for the max block number in the database exceeding the range max. When this occurs, an errant range was produced by the #1230 query because it chose the greatest of the range and the max block when trying to find the end point for the gap search. The testing did not catch #1266 because the doctests only used block numbers that exceeded the search range, by 1 and the bug did not show up until it was 2 or more. The new query is split into 4 subqueries: 1. missing prefix when range min < min(block.number) 2. missing infix when the blocks aren't in the range at all 3. missing suffix when max(block.number) < range max 4. gaps between existent block numbers This version is also more efficient as there is only a single sort of the outer `UNION ALL` result instead of a sort of real blocks and fake end points for the range. It is able to move the `UNION ALL` up because it doesn't need to produce fake end cap blocks. This positioning of the `UNION ALL` and `ORDER BY` on the outer most query allows for all 4 queries to use `one_consensus_block_at_height` index and either a limit (for `min`/`max`) or a window aggregate (for `lag`), which has minimal, single row cost.		6 years ago
..
benchmarks/explorer/chain	Denormalize blocks.number into transasctions.block_number	7 years ago
config	Use :timer functions to make timeout values clearer	6 years ago
lib	Allow block numbers to exceed missing block search range by > 1	6 years ago
priv	Remove opcodes from CodeCompiler	6 years ago
test	Failing regression test for #1266	6 years ago
.gitignore	Add bare admin panel (#927 )	6 years ago
.sobelow-conf	Derive transaction forks for transacion in blocks that go non-consensus	6 years ago
README.md	Support for Moxing WebSocket	6 years ago
coveralls.json	Use configuration to conditionally start processes (#178 )	7 years ago
mix.exs	Add :dev to plug_cowboy dependency in explorer	6 years ago
package-lock.json	Update JS solidity compiler	6 years ago
package.json	Update JS solidity compiler	6 years ago

README.md

BlockScout

This is a tool for inspecting and analyzing the POA Network blockchain.

Machine Requirements

Erlang/OTP 20.2+
Elixir 1.5+
Postgres 10.0

Required Accounts

Github for code storage

Setup Instructions

Development

To get BlockScout up and running locally:

Set up some default configuration with: $ cp config/dev.secret.exs.example config/dev.secret.exs
Install dependencies with $ mix do deps.get, local.rebar, deps.compile, compile
Create and migrate your database with $ mix ecto.create && mix ecto.migrate
Run IEx (Interactive Elixir) to access the index and explore: $ iex -S mix

Testing

Format the Elixir code: $ mix format
Run the test suite with coverage: $ mix coveralls.html
Lint the Elixir code: $ mix credo --strict
Run the dialyzer: mix dialyzer --halt-exit-status
Check the Elixir code for vulnerabilities: $ mix sobelow --config

Benchmarking

`Explorer.Chain.recent_collated_transactions/0`

Reset the test database: MIX_ENV=test mix do ecto.drop, ecto.create, ecto.migrate
Change tag in benchmarks/explorer/chain/recent_collated_transactions.exs to a new value, so that it will compare against the old values saved in benchmarks/explorer/chain/recent_collated_transactions.benchee
Run the benchmark: MIX_ENV=test mix run benchmarks/explorer/chain/recent_collated_transactions.exs