ava-sim

ava-sim

ava-sim makes it easy for anyone to spin up a local instance of an Avalanche network to interact with the standard APIs or to test a custom VM.

Prerequisites

You must have Golang >= 1.16 and a configured $GOPATH.

Build

In order to build dependencies run ./scripts/build.sh.

Standard Network

To spin up a standard 5 node network, just run ./scripts/run.sh. When the network is running, you'll see the following logs printed:

standard VM endpoints now accessible at:
NodeID-7Xhw2mDxuDS44j42TCB6U5579esbSt3Lg: http://127.0.0.1:9650
NodeID-MFrZFVCXPv5iCn6M9K6XduxGTYp891xXZ: http://127.0.0.1:9652
NodeID-NFBbbJ4qCmNaCzeW7sxErhvWqvEQMnYcN: http://127.0.0.1:9654
NodeID-GWPcbFJZFfZreETSoWjPimr846mXEKCtu: http://127.0.0.1:9656
NodeID-P7oB2McjBGgW2NXXWVYjV8JEDFoW9xDE5: http://127.0.0.1:9658

Custom VM (Subnet)

Before running your own VM, we highly recommend reading the Create a Custom Blockchain Tutorial. This tool automates all the steps here so running your own VM is just a single command.

To spin up a 5 node network where all nodes run your custom VM, just run ./scripts/run.sh [vm] [vm-genesis]. In this command, [vm] is the path to your custom VM binary and [vm-genesis] is the path to your custom VM genesis. You can learn more about writing your own VM here.

Example: Subnet-EVM

For those that have yet to create their own VM, you can run ./scripts/subnet-evm.sh to start your own network + subnet running the Subnet-EVM. After initial network startup, you'll see the following logs when all validators in the network are validating your custom blockchain (the actual blockchain ID may be slightly different):

NodeID-7Xhw2mDxuDS44j42TCB6U5579esbSt3Lg validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-MFrZFVCXPv5iCn6M9K6XduxGTYp891xXZ validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-NFBbbJ4qCmNaCzeW7sxErhvWqvEQMnYcN validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-GWPcbFJZFfZreETSoWjPimr846mXEKCtu validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-P7oB2McjBGgW2NXXWVYjV8JEDFoW9xDE5 validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2

When the VM is ready to interact with, the URLs it is accessible on will be printed out:

Custom VM endpoints now accessible at:
NodeID-7Xhw2mDxuDS44j42TCB6U5579esbSt3Lg: http://127.0.0.1:9650/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-MFrZFVCXPv5iCn6M9K6XduxGTYp891xXZ: http://127.0.0.1:9652/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-NFBbbJ4qCmNaCzeW7sxErhvWqvEQMnYcN: http://127.0.0.1:9654/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-GWPcbFJZFfZreETSoWjPimr846mXEKCtu: http://127.0.0.1:9656/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-P7oB2McjBGgW2NXXWVYjV8JEDFoW9xDE5: http://127.0.0.1:9658/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2

You can view a full list of methods you can use to interact with Subnet-EVM here. Getting the current block height is a good starter:

curl -X POST --data '{
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "id": 1
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2/rpc

Using MetaMask

Log in to MetaMask -> Click the Network drop-down -> Select Custom RPC

Network Name: WAGMI
New RPC URL: http://127.0.0.1:9650/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2/rpc
ChainID: 43214
Symbol: WAGMI
Explorer: (leave blank)

Log in to MetaMask -> Click the Accounts drop-down -> Import Account

Type: Private Key
Paste your private key string here: 56289e99c94b6912bfc12adc093c9b51124f0dc54ac7a766b2bc5ccf558d8027

This private key is associated with the address 0x8db97C7cEcE249c2b98bDC0226Cc4C2A57BF52FC.

Once you've added your network and imported the address with all the funds, you can send a transaction like you normally would in MetaMask. Have fun!

Example: TimestampVM

But wait, there's more! You can also run ./scripts/timestampvm.sh to start your own network + subnet running the TimestampVM. After initial network startup (just like with the Subnet-EVM), you'll see the following logs when all validators in the network are validating your custom blockchain (the actual blockchain ID may be slightly different):

NodeID-7Xhw2mDxuDS44j42TCB6U5579esbSt3Lg validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-MFrZFVCXPv5iCn6M9K6XduxGTYp891xXZ validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-NFBbbJ4qCmNaCzeW7sxErhvWqvEQMnYcN validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-GWPcbFJZFfZreETSoWjPimr846mXEKCtu validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-P7oB2McjBGgW2NXXWVYjV8JEDFoW9xDE5 validating blockchain 28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2

When the VM is ready to interact with, the URLs it is accessible on will be printed out:

Custom VM endpoints now accessible at:
NodeID-7Xhw2mDxuDS44j42TCB6U5579esbSt3Lg: http://127.0.0.1:9650/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-MFrZFVCXPv5iCn6M9K6XduxGTYp891xXZ: http://127.0.0.1:9652/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-NFBbbJ4qCmNaCzeW7sxErhvWqvEQMnYcN: http://127.0.0.1:9654/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-GWPcbFJZFfZreETSoWjPimr846mXEKCtu: http://127.0.0.1:9656/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2
NodeID-P7oB2McjBGgW2NXXWVYjV8JEDFoW9xDE5: http://127.0.0.1:9658/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2

You can view a full list of simple methods you can use to interact with the custom VM here. Getting the genesis block is a good starter:

curl -X POST --data '{
    "jsonrpc": "2.0",
    "method": "timestampvm.getBlock",
    "params":{},
    "id": 1
}' -H 'content-type:application/json;' 127.0.0.1:9650/ext/bc/28TtJ7sdYvdgfj1CcXo5o3yXFMhKLrv4FQC9WhgSHgY6YNYRs2

What this is NOT

This tool is NOT intended to be a full-fledged node automation framework. Rather, it is meant to be a simple tool for anyone to get started with Avalanche.

If you are looking for a more powerful framework, check out avash. This tool lets you run multiple versions of the same binary and provide custom node configs.