> ## Documentation Index
> Fetch the complete documentation index at: https://api-docs.sw4p.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Build Solana TX

> Build a Solana transaction for signing

Build a transaction for Solana → EVM transfers.

## Request Body

<ParamField body="to" type="string" required>
  Destination chain: `ETH`, `BASE`, `ARB`, `POLYGON`
</ParamField>

<ParamField body="amount" type="string" required>
  Amount in USDC
</ParamField>

<ParamField body="from_wallet" type="string" required>
  Sender's Solana address
</ParamField>

<ParamField body="recipient" type="string" required>
  Recipient's EVM address
</ParamField>

## Response

<ResponseField name="intent_id" type="string">
  Intent ID (use when submitting)
</ResponseField>

<ResponseField name="transaction" type="string">
  Base64-encoded transaction
</ResponseField>

<RequestExample>
  ```bash theme={null}
  curl -X POST https://api.sw4p.io/sdk/v1/solana/build-tx \
    -H "Content-Type: application/json" \
    -H "X-API-Key: sk_..." \
    -d '{
      "to": "BASE",
      "amount": "100.00",
      "from_wallet": "5abc...",
      "recipient": "0x..."
    }'
  ```
</RequestExample>

<ResponseExample>
  ```json theme={null}
  {
    "intent_id": "int_xyz789",
    "transaction": "AQAAAA...",
    "expires_at": "2024-01-01T00:05:00Z"
  }
  ```
</ResponseExample>