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

blockchain ethereum explorer elixir

History

Luke Imhoff 04d3644839 Use where clause for on_conflict to only write tuples that are different When the `ON CONFLICT` clause is triggered, it still causes a new tuple in Postgres to be written even if the value of all the columns is the same. Making a new tuple means that the table needs to be vacuumed sooner and leads to more work and churn for the database and its storage. But, there is a way to prevent this unnecessary churn: Postgres supports a `WHERE` clause on the `ON CONFLICT DO UPDATE` that allows us to not write a new row if the data would be the same. While testing this, it already showed it can prevent unnecessary updates to the `tokens` table when the MetadataUpdater is running.		6 years ago
..
benchmarks/explorer/chain	Denormalize blocks.number into transasctions.block_number	7 years ago
config	Include import_id and transaction_id in logger metadata	6 years ago
lib	Use where clause for on_conflict to only write tuples that are different	6 years ago
priv	Remove opcodes from CodeCompiler	6 years ago
test	Add reward value of a block in the tile and overview section	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