> For the complete documentation index, see [llms.txt](https://docs.lighter.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lighter.xyz/evm/getting-started.md).

# Getting Started

This guide shows how to send your first transaction on Lighter EVM using `cast`.

Before you start:

* use a disposable account that you control
* obtain access to the Lighter EVM RPC endpoint
* fund your account with Lighter EVM ETH

## Prerequisites

Install Foundry (if not already installed), then make sure `cast` is available:

```bash
cast --version
```

## 1. Export environment variables

```bash
export LIGHTER_EVM_RPC_URL="<lighter_evm_rpc_url>"
export LIGHTER_EVM_PRIVATE_KEY="<your_private_key>"
export RECIPIENT="0x1111111111111111111111111111111111111111"
```

## 2. Confirm your setup

Check the chain ID:

```bash
cast chain-id --rpc-url "$LIGHTER_EVM_RPC_URL"
```

This should return Lighter EVM chain ID `chainId = 19_529 = 0x4C49 = "LI"`.

Get your sender address from the private key:

```bash
export SENDER="$(cast wallet address --private-key "$LIGHTER_EVM_PRIVATE_KEY")"
echo "$SENDER"
```

Check sender balance:

```bash
cast balance "$SENDER" --rpc-url "$LIGHTER_EVM_RPC_URL"
```

## 3. Send a transaction with `cast`

Send a simple ETH transfer:

```bash
# Lighter EVM also derives its data-availability pubdata budget from the gas limit,
# so a plain transfer needs more than Ethereum's standard 21,000 gas.
cast send "$RECIPIENT" \
  --value 0.001ether \
  --gas-limit 30000 \
  --private-key "$LIGHTER_EVM_PRIVATE_KEY" \
  --rpc-url "$LIGHTER_EVM_RPC_URL"
```

`cast send` prints the transaction hash and receipt fields after submission.

## 4. Verify the transaction

Inspect the transaction:

```bash
cast tx <TX_HASH> --rpc-url "$LIGHTER_EVM_RPC_URL"
```

Inspect the receipt:

```bash
cast receipt <TX_HASH> --rpc-url "$LIGHTER_EVM_RPC_URL"
```

Check recipient balance:

```bash
cast balance "$RECIPIENT" --rpc-url "$LIGHTER_EVM_RPC_URL"
```


---

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