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Sandbox Reference

Here you will find a reference to everything available within the Sandbox.


You can run the Sandbox using either Docker or npm.

With Docker

/bin/bash -c "$(curl -fsSL '')"

This will attempt to run the Sandbox on localhost:8080. You can change the port defined in ./.aztec/docker-compose.yml. Running the command again will overwrite any changes made to the docker-compose.yml.

If you don't have the CLI installed via a node package manager, this command will also install or update the CLI.

To install a specific version of the sandbox, you can set the environment variable SANDBOX_VERSION

SANDBOX_VERSION=<version> /bin/bash -c "$(curl -fsSL '')"

NOTE: The sandbox version should be the same as your @aztec/cli package to ensure compatibility.

With npm

You can download and run the Sandbox package directly if you have nodejs 18 or higher installed.

You will also need an Ethereum node like Anvil or Hardhat running locally on port 8545.

npx @aztec/aztec-sandbox @aztec/cli

You can read this tutorial on how to use the npm package


The installation command will run the sandbox, and once installed you can run like so:

cd ~/.aztec && docker-compose up

Running Aztec PXE / Node / P2P-Bootstrap node

If you wish to run components of the Aztec network stack separately, you can still use the Sandbox by including a MODE variable. The values for MODE can be:

- sandbox (default)
- node
- pxe
- p2p-bootstrap

Environment Variables

There are various environment variables you can use when running the whole sandbox or when running on of the available modes.


DEBUG=aztec:* # The level of debugging logs to be displayed. using "aztec:*" will log everything.
ETHEREUM_HOST=http://ethereum:8545 # The Ethereum JSON RPC URL. We use an anvil instance that runs in parallel to the sandbox on docker by default.
HOST_WORKDIR='${PWD}' # The location to store log outpus. Will use ~/.aztec where the docker-compose.yml file is stored by default.
CHAIN_ID=31337 # The Chain ID that the Ethereum host is using.
TEST_ACCOUNTS='true' # Option to deploy 3 test account when sandbox starts. (default: true)
DEPLOY_AZTEC_CONTRACTS='true' # Option to deploy the Aztec contracts when sandbox starts. (default: true)
MODE='sandbox' # Option to start the sandbox or a standalone part of the system. (default: sandbox)
AZTEC_NODE_PORT=8079 # The port that the Aztec node wil be listening to (default: 8079)
PXE_PORT=8080 # The port that the PXE will be listening to (default: 8080)

## Polling intervals ##

Aztec Node

Variables like DEPLOY_AZTEC_CONTRACTS & AZTEC_NODE_PORT are valid here as described above. TEST_ACCOUNTS cannot be used here because the Aztec node does not control an Aztec account to deploy contracts from.

# P2P config #
# Configuration variables for connecting a Node to the Aztec Node P2P network. You'll need a running P2P-Bootstrap node to connect to.
P2P_ENABLED='false' # A flag to enable P2P networking for this node. (default: false)
P2P_BLOCK_CHECK_INTERVAL_MS=100 # The frequency in which to check for new L2 blocks.
P2P_L2_BLOCK_QUEUE_SIZE=1000 # Size of queue of L2 blocks to store.
P2P_TCP_LISTEN_PORT=40400 # The tcp port on which the P2P service should listen for connections.
P2P_TCP_LISTEN_IP= #The tcp IP on which the P2P service should listen for connections.
PEER_ID_PRIVATE_KEY='' # An optional peer id private key. If blank, will generate a random key.
BOOTSTRAP_NODES='' # A list of bootstrap peers to connect to, separated by commas
P2P_ANNOUNCE_HOSTNAME='' # Hostname to announce to the p2p network
P2P_ANNOUNCE_PORT='' # Port to announce to the p2p network
P2P_KAD_CLIENT='false' # Optional specification to run as a client in the Kademlia routing protocol.
P2P_NAT_ENABLED='false' # Whether to enable NAT from libp2p
P2P_MIN_PEERS=10 # The minimum number of peers (a peer count below this will cause the node to look for more peers)
P2P_MAX_PEERS=100 # The maximum number of peers (a peer count above this will cause the node to refuse connection attempts)

## Aztec Contract Addresses ##
# When running a standalone node, you need to have deployed Aztec contracts on your Ethereum host, then declare their addresses as env variables.

## Sequencer variables ##
SEQ_PUBLISHER_PRIVATE_KEY=0x01234567890abcde01234567890abcde # Private key of an ethereum account that will be used by the sequencer to publish blocks.
SEQ_MAX_TX_PER_BLOCK=32 # Maximum txs to go on a block. (default: 32)
SEQ_MIN_TX_PER_BLOCK=1 # Minimum txs to go on a block. (default: 1)


Variables like TEST_ACCOUNTS & PXE_PORT are valid here as described above. DEPLOY_AZTEC_CONTRACTS cannot be used here as the PXE does not control an Ethereum account.

AZTEC_NODE_URL='http://localhost:8079' # The address of an Aztec Node URL that the PXE will connect to (default: http://localhost:8079)
PXE_PORT=8080 # The port that the PXE will be listening to (default: 8080)
TEST_ACCOUNTS='true' # Option to deploy 3 test account when sandbox starts. (default: true)
PXE_BLOCK_POLLING_INTERVAL_MS=50 # Interval to check for new L2 blocks. (default: 50)
PXE_L2_STARTING_BLOCK=1 # L2 Block to start synching the PXE from (default: 1)

P2P Bootstrap Node

The P2P Bootstrap node is a standalone app whose purpose is to assist new P2P network participants in acquiring peers.

P2P_TCP_LISTEN_IP='' # The IP Address on which to listen for connections.
P2P_TCP_LISTEN_PORT=40400 # The port on which to listen for connections.
PEER_ID_PRIVATE_KEY='' # The private key to be used by the peer for secure communications with other peers. This key will also be used to derive the Peer ID.
P2P_ANNOUNCE_HOSTNAME='' # The IPAddress/Hostname that other peers should use to connect to this node, this may be different to P2P_TCP_LISTEN_IP if e.g. the node is behind a NAT.
P2P_ANNOUNCE_PORT='' # The port that other peers should use to connect to this node, this may be different to P2P_TCP_LISTEN_PORT if e.g. the node is behind a NAT.


If you have set up the Sandbox with Docker, you will also have Otterscan.

You can see Ethereum Layer 1 activity through the local Otterscan on http://localhost:5100. This is especially useful for dapps that use L1-L2 messaging through portal contracts.

Cheat Codes

To help with testing, the sandbox is shipped with a set of cheatcodes.

Cheatcodes allow you to change the time of the Aztec block, load certain state or more easily manipulate Ethereum instead of having to write dedicated RPC calls to anvil or hardhat.

You can find the cheat code reference here.


We have shipped a number of example contracts in the @aztec/noir-contracts npm package. This is included with the cli by default so you are able to use these contracts to test with. To get a list of the names of the contracts run:

% aztec-cli example-contracts
Source code: /yarn-project/end-to-end/src/cli_docs_sandbox.test.ts#L95-L118

You can see all of our example contracts in the monorepo here.


The sandbox is shipped with full-stack Aztec project templates, with example contracts, testing scripts, and web interfaces.

You can read more information about how to use boxes here