mud dev-contracts

Start a development server for MUD contracts, and redeploy or modify the World when contracts change.

Using the command

Before you run mud dev-contracts you need to specify the private key of the deploying account. There are several ways to do this:

Export an environment variable.
```
export PRIVATE_KEY=0x<key goes here>
```

Edit .env to specify the PRIVATE_KEY value.

# This .env file is for demonstration purposes only.
#
# This should usually be excluded via .gitignore and the env vars attached to
# your deployment environment, but we're including this here for ease of local
# development. Please do not commit changes to this file!
#
# Anvil default private key:
PRIVATE_KEY=0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d

You also need to specify a URL to the blockchain. Again, there are several ways to do this:

Use the --rpc <url> command line parameter.
Specify the URL as the eth_rpc_url value in the local profile in foundry.toml (opens in a new tab).
Do not specify an RPC at all, in which case mud dev-contracts starts an anvil (opens in a new tab) instance for you.

These are the command line options you can specify on mud dev-contracts:

Option	Meaning	Type	Default value
`--version`	Show version number	boolean	`false`
`--configPath`	Path to the config file	string	`mud.config.ts`
`--rpc`¹	The RPC URL to use	string	Empty, in which case the command starts `anvil` (opens in a new tab) for you
`--worldAddress`	Deploy to an existing World at the given address	string	Empty, deploy new `World`
`--alwaysRunPostDeploy`	Run `PostDeploy.s.sol` after each deploy	boolean	`false` (run the script only when deploying a new `World`)
`--help`	Show help	boolean	`false`

(1) The hostname localhost may not work. If that is the case, use 127.0.0.1 instead.

mud deploy mud abi-ts