Hannah Reynolds

Hannah Reynolds

1673558400

Web3 Proxy: Quick and Dirty Proxy for Ethereum Nodes

web3_proxy

Web3_proxy is a fast caching and load balancing proxy for web3 (Ethereum or similar) JsonRPC servers.

Under construction! This code is under active development. If you want to run this proxy youself, send me a message on Twitter and I can explain things that aren't documented yet. Most RPC methods are supported, but filters are coming soon. And of course, more tests are always needed.

Signed transactions (eth_sendRawTransaction) are sent in parallel to the configured private RPCs (eden, ethermine, flashbots, etc.).

All other requests are sent to an RPC server on the latest block (alchemy, moralis, rivet, your own node, or one of many other providers). If multiple servers are in sync, they are prioritized by active_requests/soft_limit. Note that this means that the fastest server is most likely to serve requests and slow servers are unlikely to ever get any requests.

Each server has different limits to configure. The soft_limit is the number of parallel active requests where a server starts to slow down. The hard_limit is where a server starts giving rate limits or other errors.

Quick development

  1. Run docker-compose up -d to start the database and caches. See docker-compose.yml for details.
  2. Copy ./config/example.toml to ./config/development.toml and change settings to match your setup.
  3. Run cargo commands:
$ cargo run --release -- --help

   Compiling web3_proxy v0.1.0 (/home/bryan/src/web3_proxy/web3_proxy)
    Finished release [optimized + debuginfo] target(s) in 17.69s
     Running `target/release/web3_proxy --help`
Usage: web3_proxy [--port <port>] [--workers <workers>] [--config <config>]

web3_proxy is a fast caching and load balancing proxy for web3 (Ethereum or similar) JsonRPC servers.

Options:
  --port            what port the proxy should listen on
  --workers         number of worker threads
  --config          path to a toml of rpc servers
  --help            display usage information

Start the server with the defaults (listen on http://localhost:8544 and use ./config/development.toml which uses the database and cache running under docker and proxies to a bunch of public nodes:

cargo run --release

Common commands

Create a user:

cargo run --bin web3_proxy_cli -- --db-url "$YOUR_DB_URL" create_user --address "$USER_ADDRESS_0x"

Check that the proxy is working:

curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"web3_clientVersion","id":1}' 127.0.0.1:8544

Check that the websocket is working:

$ websocat ws://127.0.0.1:8544

{"id": 1, "method": "eth_subscribe", "params": ["newHeads"]}

{"id": 2, "method": "eth_subscribe", "params": ["newPendingTransactions"]}

{"id": 3, "method": "eth_subscribe", "params": ["newPendingFullTransactions"]}

{"id": 4, "method": "eth_subscribe", "params": ["newPendingRawTransactions"]}

You can copy config/example.toml to config/production-$CHAINNAME.toml and then run docker-compose up --build -d start proxies for many chains.

Compare 3 RPCs:

web3_proxy_cli health_compass https://eth.llamarpc.com https://eth-ski.llamarpc.com https://rpc.ankr.com/eth

Run migrations

This is only really useful during development. The migrations run on application start.

cd migration
cargo run up

Create a user:

web3_proxy_cli --config ... create_user --address 0x0000000000000000000000000000000000000000 --email infra@llamanodes.com --description "..."

Give a user unlimited requests per second:

Copy the ULID key (or UUID key) out of the above command, and put it into the following command.

web3_proxy_cli --config ... change_user_tier_by_key "$RPC_ULID_KEY_FROM_PREV_COMMAND" "Unlimited"

Health compass

Health check 3 servers and error if the first one doesn't match the others.

web3_proxy_cli https://eth.llamarpc.com/ https://rpc.ankr.com/eth https://cloudflare-eth.com

Adding new database tables

cargo install sea-orm-cli
  1. (optional) drop the current dev db
  2. sea-orm-cli migrate
  3. sea-orm-cli generate entity -u mysql://root:dev_web3_proxy@127.0.0.1:13306/dev_web3_proxy -o entities/src --with-serde both
  4. After running the above, you will need to manually fix some columns: Vec<u8> -> sea_orm::prelude::Uuid and i8 -> bool. Related: https://github.com/SeaQL/sea-query/issues/375 https://github.com/SeaQL/sea-orm/issues/924

Flame Graphs

Flame graphs make a developer's join of finding slow code painless:

$ cat /proc/sys/kernel/kptr_restrict
1
$ echo 0 | sudo tee /proc/sys/kernel/kptr_restrict
0
$ cat /proc/sys/kernel/perf_event_paranoid
4
$ echo -1 | sudo tee /proc/sys/kernel/perf_event_paranoid
-1
$ CARGO_PROFILE_RELEASE_DEBUG=true cargo flamegraph --bin web3_proxy --no-inline

Be sure to use --no-inline or perf will be VERY slow

GDB

Developers can run the proxy under gdb for advanced debugging:

cargo build --release && RUST_LOG=web3_proxy=debug rust-gdb --args target/debug/web3_proxy --listen-port 7503 --rpc-config-path ./config/production-eth.toml

TODO: also enable debug symbols in the release build by modifying the root Cargo.toml

Load Testing

Test the proxy:

wrk -s ./wrk/getBlockNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8544/u/$API_KEY
wrk -s ./wrk/getLatestBlockByNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8544/u/$API_KEY

Test geth (assuming it is on 8545):

wrk -s ./wrk/getBlockNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8545
wrk -s ./wrk/getLatestBlockByNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8545

Test erigon (assuming it is on 8945):

wrk -s ./wrk/getBlockNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8945
wrk -s ./wrk/getLatestBlockByNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8945

Note: Testing with getLatestBlockByNumber.lua is not great because the latest block changes and so one run is likely to be very different than another.

Run ethspam and versus for a more realistic load test:

ethspam --rpc http://127.0.0.1:8544 | versus --concurrency=100 --stop-after=10000 http://127.0.0.1:8544

ethspam --rpc http://127.0.0.1:8544/u/$API_KEY | versus --concurrency=100 --stop-after=10000 http://127.0.0.1:8544/u/$API_KEY

Download details:

Author: llamanodes
Source code: https://github.com/llamanodes/web3-proxy

License: GPL-3.0 license

#ethereum #blockchain #bitcoin 

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Web3 Proxy: Quick and Dirty Proxy for Ethereum Nodes
Jack Shaw

Jack Shaw

1672986240

A Curated List Of Awesome Ethereum Ressources

A curated list of awesome Ethereum Ressources. Inspired by awesome-go.

Contributing

Please take a quick gander at the contribution guidelines first. Thanks to all contributors; you rock!

If you see a link or project here that is no longer maintained or is not a good fit, please submit a pull request to improve this file. Thank you!

Basic {#basic}

What is Ethereum? {#what-is-ethereum}

Bitcoin 2.0? a world computer? a smart contracts platform?

Papers {#papers}

If you feel like going to the source

Roadmap {#roadmap}

  • Timeline - Expected timeline - Post from Mars 2015.
    • Olympic - 0: Olympic.
    • Frontier - 1: Frontier.
    • Homestead - 2: Homestead <----- HERE WE ARE.
    • Metropolis - 3: Metropolis - "when we finally officially release a relatively full-featured user interface for non-technical users of Ethereum"
    • Serenity - 4: Serenity - Switching the network from Proof of Work to Proof of Stake ( Casper). end of 2016?.

Branding / Logo {#branding}

Crowfunding {#crowfunding}

Remembering a time where the price of Ether was 2000 ETH per BTC

Foundation {#foundation}

The Ethereum Foundation’s mission is to promote and support research, development and education to bring decentralized protocols and tools to the world that empower developers to produce next generation decentralized applications (DAPPs), and together build a more globally accessible, more free and more trustworthy Internet.

  • Website - The Ethereum foundation Page.

Clients {#clients}

Implementations of the Ethereum protocol.

The Ethereum network {#network}

Network Stat {#network-stats}

Need information about a block, a current difficulty, the network hashrate?

  • Ethstats - See latest data of the Ethereum Network.

Blockhain Explorer {#blockchain-explorer}

Mainnet

Testnet

Ether {#ether}

Ether is the name of the currency used within Ethereum

Info {#ether-info}

SPOILER: There are about 77 million ethers in existence and every new block (an average of 15 seconds) creates 5 new ether.

Exchanges {#exchanges}

Where you can trade ethers - Remember: if you don't control the private you don't really control the ethers

Faucets {#faucets}

Free Ether? don't have big expectation :)

Mainnet

Testnet

Wallets {#wallets}

To store your ethers

  • Mist - Mist - Official wallet with integrated full node.
  • Jaxx - By KryptoKit, Wallets that unify the Bitcoin and Ethereum experience accross Devices.
  • Myetherwallet - Open Source JavaScript Client-Side Ether Wallet.
  • Icebox - Lightwallet-powered cold storage solution..

Mining {#mining}

let's make the network work! and earn some ethers!

How to {#mining-hoe-to}

Mining pools {#mining-pools}

Fell alone? join a pool

Smart Contract languages {#smart-contracts-languages}

Solidity

Solidity, the JavaScript-like language

Serpent

Serpent, the Python-like language

LLL

LLL, the Lisp-like languagee

DAPP {#dapp}

Tutorials {#tutorials}

IDE {#ide}

Others awesome things & concepts {#others}

Casper {#casper}

  • Casper - Casper - Proof of Work (PoW) for Serenity.
  • Research - ethereum/research

Whisper {#whisper}

an upcoming P2P messaging protocol that will be integrated into the EtherBrowser.

  • Whisper Wiki Wiki article about Whisper ( December 2014)-
  • Whisper ? - What is Whisper and what is it used for?.

Swarm {#swarm}

  • Swarm - Swarm for Storage .

web3-j {#web3-j}

Ethereum compatible JavaScript API which implements the Generic JSON RPC spec.

Gas {#gas}

Gas is the fundamental network cost unit and is paid for exclusively in ether.

  • Gas Doc - Gas and transaction costs from the Ethereum Documentation.
  • What is Gas? - What is the “Gas” in Ethereum? -Post from CryptoCompare.
  • Cost calculator - Calculate the cost of conducting a transaction or executing a contract on Ethereum.

Projects using Ethereum {#projects}

Big ones

  • Augur - Prediction Market.
  • Slock.it - Rent, sell or share anything - without middlemen.
  • Digix - Transparent asset tracking of LBMA GOLD with blockchain technology 2.0.

Lists of projects

Companies {#companies}

Community {#community}

Social {#social}

Skype {#skype}

Main Skype Channels

  • Ethereum - Ethereum: the main channel, bridged to IRC #ethereum.
  • Ethereum-dev - Ethereum-dev: the developer's channel, bridged to IRC #ethereum-dev.

Speciality Skype Channels

Regional Skype Channels

  • London - London General: London-based Etherians.
  • Italia - Italia: Italian Etherians.
  • Romania - Romania: Romanian Etherians.
  • Russia - Russia - Russian Etherians (Russian language).

Gitter channels

IRC channels (Freenode)

  • Go-Ethereum -
    • #ethereum: for general discussion
    • #ethereum-dev: for development specific questions and discussions
    • ##ethereum: for offtopic and banter
    • #ethereum-mining: for mining only conversations
    • #ethereum-markets: for discussions about markets

Meetups {#meetups}

Events {#events}

Devcon

Stay up to date! {#up-to-date}

Newsletter {#newsletter}

Podcast {#podcast}

Contributing

Your contributions are always welcome! Please take a look at the contribution guidelines first.

I would keep some pull requests open if I'm not sure whether the content are awesome, you could vote for them by leaving a comment that contains +1.

To be added

  • Jobs
  • Courses

Download details:

Author: lampGit
Source code: https://github.com/lampGit/awesome-ethereum

#ethereum 

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Hannah Reynolds

Hannah Reynolds

1673558400

Web3 Proxy: Quick and Dirty Proxy for Ethereum Nodes

web3_proxy

Web3_proxy is a fast caching and load balancing proxy for web3 (Ethereum or similar) JsonRPC servers.

Under construction! This code is under active development. If you want to run this proxy youself, send me a message on Twitter and I can explain things that aren't documented yet. Most RPC methods are supported, but filters are coming soon. And of course, more tests are always needed.

Signed transactions (eth_sendRawTransaction) are sent in parallel to the configured private RPCs (eden, ethermine, flashbots, etc.).

All other requests are sent to an RPC server on the latest block (alchemy, moralis, rivet, your own node, or one of many other providers). If multiple servers are in sync, they are prioritized by active_requests/soft_limit. Note that this means that the fastest server is most likely to serve requests and slow servers are unlikely to ever get any requests.

Each server has different limits to configure. The soft_limit is the number of parallel active requests where a server starts to slow down. The hard_limit is where a server starts giving rate limits or other errors.

Quick development

  1. Run docker-compose up -d to start the database and caches. See docker-compose.yml for details.
  2. Copy ./config/example.toml to ./config/development.toml and change settings to match your setup.
  3. Run cargo commands:
$ cargo run --release -- --help

   Compiling web3_proxy v0.1.0 (/home/bryan/src/web3_proxy/web3_proxy)
    Finished release [optimized + debuginfo] target(s) in 17.69s
     Running `target/release/web3_proxy --help`
Usage: web3_proxy [--port <port>] [--workers <workers>] [--config <config>]

web3_proxy is a fast caching and load balancing proxy for web3 (Ethereum or similar) JsonRPC servers.

Options:
  --port            what port the proxy should listen on
  --workers         number of worker threads
  --config          path to a toml of rpc servers
  --help            display usage information

Start the server with the defaults (listen on http://localhost:8544 and use ./config/development.toml which uses the database and cache running under docker and proxies to a bunch of public nodes:

cargo run --release

Common commands

Create a user:

cargo run --bin web3_proxy_cli -- --db-url "$YOUR_DB_URL" create_user --address "$USER_ADDRESS_0x"

Check that the proxy is working:

curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"web3_clientVersion","id":1}' 127.0.0.1:8544

Check that the websocket is working:

$ websocat ws://127.0.0.1:8544

{"id": 1, "method": "eth_subscribe", "params": ["newHeads"]}

{"id": 2, "method": "eth_subscribe", "params": ["newPendingTransactions"]}

{"id": 3, "method": "eth_subscribe", "params": ["newPendingFullTransactions"]}

{"id": 4, "method": "eth_subscribe", "params": ["newPendingRawTransactions"]}

You can copy config/example.toml to config/production-$CHAINNAME.toml and then run docker-compose up --build -d start proxies for many chains.

Compare 3 RPCs:

web3_proxy_cli health_compass https://eth.llamarpc.com https://eth-ski.llamarpc.com https://rpc.ankr.com/eth

Run migrations

This is only really useful during development. The migrations run on application start.

cd migration
cargo run up

Create a user:

web3_proxy_cli --config ... create_user --address 0x0000000000000000000000000000000000000000 --email infra@llamanodes.com --description "..."

Give a user unlimited requests per second:

Copy the ULID key (or UUID key) out of the above command, and put it into the following command.

web3_proxy_cli --config ... change_user_tier_by_key "$RPC_ULID_KEY_FROM_PREV_COMMAND" "Unlimited"

Health compass

Health check 3 servers and error if the first one doesn't match the others.

web3_proxy_cli https://eth.llamarpc.com/ https://rpc.ankr.com/eth https://cloudflare-eth.com

Adding new database tables

cargo install sea-orm-cli
  1. (optional) drop the current dev db
  2. sea-orm-cli migrate
  3. sea-orm-cli generate entity -u mysql://root:dev_web3_proxy@127.0.0.1:13306/dev_web3_proxy -o entities/src --with-serde both
  4. After running the above, you will need to manually fix some columns: Vec<u8> -> sea_orm::prelude::Uuid and i8 -> bool. Related: https://github.com/SeaQL/sea-query/issues/375 https://github.com/SeaQL/sea-orm/issues/924

Flame Graphs

Flame graphs make a developer's join of finding slow code painless:

$ cat /proc/sys/kernel/kptr_restrict
1
$ echo 0 | sudo tee /proc/sys/kernel/kptr_restrict
0
$ cat /proc/sys/kernel/perf_event_paranoid
4
$ echo -1 | sudo tee /proc/sys/kernel/perf_event_paranoid
-1
$ CARGO_PROFILE_RELEASE_DEBUG=true cargo flamegraph --bin web3_proxy --no-inline

Be sure to use --no-inline or perf will be VERY slow

GDB

Developers can run the proxy under gdb for advanced debugging:

cargo build --release && RUST_LOG=web3_proxy=debug rust-gdb --args target/debug/web3_proxy --listen-port 7503 --rpc-config-path ./config/production-eth.toml

TODO: also enable debug symbols in the release build by modifying the root Cargo.toml

Load Testing

Test the proxy:

wrk -s ./wrk/getBlockNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8544/u/$API_KEY
wrk -s ./wrk/getLatestBlockByNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8544/u/$API_KEY

Test geth (assuming it is on 8545):

wrk -s ./wrk/getBlockNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8545
wrk -s ./wrk/getLatestBlockByNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8545

Test erigon (assuming it is on 8945):

wrk -s ./wrk/getBlockNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8945
wrk -s ./wrk/getLatestBlockByNumber.lua -t12 -c400 -d30s --latency http://127.0.0.1:8945

Note: Testing with getLatestBlockByNumber.lua is not great because the latest block changes and so one run is likely to be very different than another.

Run ethspam and versus for a more realistic load test:

ethspam --rpc http://127.0.0.1:8544 | versus --concurrency=100 --stop-after=10000 http://127.0.0.1:8544

ethspam --rpc http://127.0.0.1:8544/u/$API_KEY | versus --concurrency=100 --stop-after=10000 http://127.0.0.1:8544/u/$API_KEY

Download details:

Author: llamanodes
Source code: https://github.com/llamanodes/web3-proxy

License: GPL-3.0 license

#ethereum #blockchain #bitcoin 

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Aarna Davis

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