Overview

As you may be aware, Darwinia chains are EVM compatible, which means that the RPC behavior should be consistent with an Ethereum node. The majority of RPC usage aligns with the official Ethereum RPC, with the exception of the EVM tracing APIs. The key distinction is that the EVM tracing functionality is offered by a dedicated node. This tutorial will demonstrate how to run a dedicated node to enable EVM tracing functionality.

Run Evm Trace Node

Recommended Hardware

RAM: 8 GB:

Storage(SSD): 800 GB

Run Evm Tracing Node

💡

The following steps are specific to Pangolin, but the steps for other networks are similar.

Prepare the tracing binary and overridden wasms

Create a work dirctory

Let's create a directory called run-evm-tracing-node to store everything needed for setting up an EVM tracing node, including the downloaded evm tracing binary and the chain database. Additionally, we'll create a subdirectory called overridden-runtimes under run-evm-tracing-node to store all the overridden runtime files. To accomplish this, please execute the following command:

bash
mkdir run-evm-tracing-node && cd run-evm-tracing-node
mkdir overridden-runtimes

Download the precompiled tracing binary

As of the time of writing this doc (2023-09-04), the latest version of the Pangolin Chain is v6.3.1. Please ensure that you check for the latest version when running your own node.

Please be aware that there are two types of binaries available on the release page. Select the one that starts with darwinia-tracing-xxx.

bash
wget https://github.com/darwinia-network/darwinia/releases/download/pango-6310/darwinia-tracing-x86_64-linux-gnu.tar.bz2
tar xvf darwinia-tracing-x86_64-linux-gnu.tar.bz2

Download the overridden wasms

Once you have downloaded the tracing binary, you will need to download the overridden wasms before setting up your EVM tracing node. The overridden wasm files can be found in a repository maintained by the Darwinia core team. To do this, please run the following command:

bash
git clone https://github.com/darwinia-network/wasm-runtime-overrides.git
cd wasm-runtime-overrides/
git checkout origin/pangolin
cp -r pangolin/ ../run-evm-tracing-node/overridden-runtimes/

The wasm-runtime-overrides repository has four branches, each corresponding to one of the four Darwinia chains. You will need to switch to the branch that corresponds to your desired network and copy the wasm directory to your temporary workaround location. In this tutorial, we will use the pangolin branch.

Start the evm tracing node

Start the node by running the following command:

bash
./darwinia \
    --chain=pangolin \
    --base-path=data/pangolin \
    --state-pruning=archive \
    --blocks-pruning=archive \
    --execution=wasm \
    --ws-external \
    --rpc-external \
    --rpc-cors=all \
    --tracing-api=debug,trace \
    --runtime-cache-size=64 \
    --wasm-runtime-overrides=overridden-runtimes/pangolin/wasms

Please make sure to update the --chain, --base-path, and --wasm-runtime-overrides parameters according to the network you wish to set up. Additionally, ensure that the --execution=wasm flag is enabled.

Verify your node is up and running successfully by reviewing the output displayed in the terminal. The terminal should display output similar to this:

bash
2023-07-20 15:29:32 Darwinia    
2023-07-20 15:29:32 ✌️  version 6.3.0-unknown    
2023-07-20 15:29:32 ❤️  by Darwinia Network <hello@darwinia.network>, 2018-2023    
2023-07-20 15:29:32 📋 Chain specification: Pangolin2    
2023-07-20 15:29:32 🏷  Node name: befitting-drink-5121    
2023-07-20 15:29:32 👤 Role: FULL    
2023-07-20 15:29:32 💾 Database: RocksDb at data/pangolin/chains/pangolin2/db/full    
2023-07-20 15:29:32 ⛓  Native runtime: Pangolin2-6310 (DarwiniaOfficialRust-0.tx0.au0)    
2023-07-20 15:29:33 Parachain id: Id(2105)    
2023-07-20 15:29:33 Parachain Account: 5Ec4AhNxga1JYLioRBNxfRnovheDELVbZTRSnKMgvSVPvNcN    
2023-07-20 15:29:33 Parachain genesis state: 0x000000000000000000000000000000000000000000000000000000000000000000d353645e3503ca0ebe7319eee9bd70821acfa54d4161386990329b4a4f9813be03170a2e7597b7b7e3d84c05391d139a62b157e78786d8c082f29dcf4c11131400    
2023-07-20 15:29:33 Is collating: no    
2023-07-20 15:29:34 [Parachain] Found wasm override. version=Pangolin2-6320 (DarwiniaOfficialRust-0.tx0.au0) file=overridden-runtimes/pangolin/wasms/pangolin-pango-6320-tracing-runtime.compact.compressed.wasm
2023-07-20 15:29:35 [Parachain] Found wasm override. version=Pangolin2-6300 (DarwiniaOfficialRust-0.tx0.au0) file=overridden-runtimes/pangolin/wasms/pangolin-pango-6300-tracing-runtime.compact.compressed.wasm
2023-07-20 15:29:36 [Parachain] Found wasm override. version=Pangolin2-6340 (DarwiniaOfficialRust-0.tx0.au0) file=overridden-runtimes/pangolin/wasms/pangolin-pango-6340-tracing-runtime.compact.compressed.wasm
2023-07-20 15:29:36 [Parachain] Found wasm override. version=Pangolin2-6310 (DarwiniaOfficialRust-0.tx0.au0) file=overridden-runtimes/pangolin/wasms/pangolin-pango-6310-tracing-runtime.compact.compressed.wasm
2023-07-20 15:29:38 [Relaychain] 👶 Creating empty BABE epoch changes on what appears to be first startup.    
2023-07-20 15:29:38 [Relaychain] 🏷  Local node identity is: 12D3KooWFAFRHRmM3ARmKYdjKr5jzgu9HGiYi2kPW2Nh1hosmdQN    
2023-07-20 15:29:38 [Relaychain] 💻 Operating system: linux    
2023-07-20 15:29:38 [Relaychain] 💻 CPU architecture: x86_64    
2023-07-20 15:29:38 [Relaychain] 💻 Target environment: gnu    
2023-07-20 15:29:38 [Relaychain] 💻 CPU: AMD Ryzen 7 5700G with Radeon Graphics    
2023-07-20 15:29:38 [Relaychain] 💻 CPU cores: 8    
2023-07-20 15:29:38 [Relaychain] 💻 Memory: 63586MB    
2023-07-20 15:29:38 [Relaychain] 💻 Kernel: 5.19.0-46-generic    
2023-07-20 15:29:38 [Relaychain] 💻 Linux distribution: Ubuntu 22.04.1 LTS    
2023-07-20 15:29:38 [Relaychain] 💻 Virtual machine: no    
2023-07-20 15:29:38 [Relaychain] 📦 Highest known block at #0    
2023-07-20 15:29:38 [Relaychain] 〽️ Prometheus exporter started at 127.0.0.1:9616    
2023-07-20 15:29:38 [Relaychain] Running JSON-RPC HTTP server: addr=127.0.0.1:9934, allowed origins=["http://localhost:*", "http://127.0.0.1:*", "https://localhost:*", "https://127.0.0.1:*", "https://polkadot.js.org"]    
2023-07-20 15:29:38 [Relaychain] Running JSON-RPC WS server: addr=127.0.0.1:9945, allowed origins=["http://localhost:*", "http://127.0.0.1:*", "https://localhost:*", "https://127.0.0.1:*", "https://polkadot.js.org"]    
2023-07-20 15:29:38 [Relaychain] 🏁 CPU score: 1.27 GiBs    
2023-07-20 15:29:38 [Relaychain] 🏁 Memory score: 14.10 GiBs    
2023-07-20 15:29:38 [Relaychain] 🏁 Disk score (seq. writes): 733.15 MiBs    
2023-07-20 15:29:38 [Relaychain] 🏁 Disk score (rand. writes): 315.71 MiBs    
2023-07-20 15:29:38 [Relaychain] Starting with an empty approval vote DB.
2023-07-20 15:29:38 [Parachain] 🏷  Local node identity is: 12D3KooWMNkSu3SFJSaSYkjTwzBU2CtCvsMrAwkFMWRoiSwDDrTe    
2023-07-20 15:29:38 [Parachain] 💻 Operating system: linux    
2023-07-20 15:29:38 [Parachain] 💻 CPU architecture: x86_64    
2023-07-20 15:29:38 [Parachain] 💻 Target environment: gnu    
2023-07-20 15:29:38 [Parachain] 💻 CPU: AMD Ryzen 7 5700G with Radeon Graphics    
2023-07-20 15:29:38 [Parachain] 💻 CPU cores: 8    
2023-07-20 15:29:38 [Parachain] 💻 Memory: 63586MB    
2023-07-20 15:29:38 [Parachain] 💻 Kernel: 5.19.0-46-generic    
2023-07-20 15:29:38 [Parachain] 💻 Linux distribution: Ubuntu 22.04.1 LTS    
2023-07-20 15:29:38 [Parachain] 💻 Virtual machine: no    
2023-07-20 15:29:38 [Parachain] 📦 Highest known block at #0    
2023-07-20 15:29:38 [Parachain] 〽️ Prometheus exporter started at 127.0.0.1:9615    
2023-07-20 15:29:38 [Parachain] Running JSON-RPC HTTP server: addr=0.0.0.0:9933, allowed origins=["*"]    
2023-07-20 15:29:38 [Parachain] Running JSON-RPC WS server: addr=0.0.0.0:9944, allowed origins=["*"]    
2023-07-20 15:29:38 [Parachain] 🏁 CPU score: 1.27 GiBs    
2023-07-20 15:29:38 [Parachain] 🏁 Memory score: 14.10 GiBs    
2023-07-20 15:29:38 [Parachain] 🏁 Disk score (seq. writes): 733.15 MiBs    
2023-07-20 15:29:38 [Parachain] 🏁 Disk score (rand. writes): 315.71 MiBs    
2023-07-20 15:29:38 [Parachain] discovered: 12D3KooWFAFRHRmM3ARmKYdjKr5jzgu9HGiYi2kPW2Nh1hosmdQN /ip4/192.168.31.52/tcp/30334/ws    
2023-07-20 15:29:38 [Relaychain] discovered: 12D3KooWMNkSu3SFJSaSYkjTwzBU2CtCvsMrAwkFMWRoiSwDDrTe /ip4/192.168.31.52/tcp/30333/ws    
2023-07-20 15:29:43 [Relaychain] 💤 Idle (0 peers), best: #0 (0x6408…063e), finalized #0 (0x6408…063e), ⬇ 0 ⬆ 0    
2023-07-20 15:29:43 [Parachain] 💤 Idle (0 peers), best: #0 (0xb067…6b70), finalized #0 (0xb067…6b70), ⬇ 0 ⬆ 0    
2023-07-20 15:29:48 [Relaychain] 💤 Idle (0 peers), best: #0 (0x6408…063e), finalized #0 (0x6408…063e), ⬇ 0 ⬆ 0