fetch_lifi_quote

Documentation for eth_defi.lifi.quote.fetch_lifi_quote function.

fetch_lifi_quote(from_chain_id, to_chain_id, from_token, to_token, from_amount, from_address, to_address=None, slippage=0.03, order='CHEAPEST', api_timeout=30)

Fetch a cross-chain quote from the LI.FI API.

Calls GET /v1/quote to get a bridge/swap quote with ready-to-sign transaction data.

Example:

from eth_defi.lifi.quote import fetch_lifi_quote
from eth_defi.lifi.constants import LIFI_NATIVE_TOKEN_ADDRESS

quote = fetch_lifi_quote(
    from_chain_id=1,  # Ethereum
    to_chain_id=42161,  # Arbitrum
    from_token=LIFI_NATIVE_TOKEN_ADDRESS,
    to_token=LIFI_NATIVE_TOKEN_ADDRESS,
    from_amount=10000000000000000,  # 0.01 ETH in wei
    from_address="0xYourWalletAddress",
)

tx_request = quote.get_transaction_request()
# Sign and send tx_request
Parameters

  • from_chain_id (int) – Source chain ID

  • to_chain_id (int) – Destination chain ID

  • from_token (str) – Source token address (use LIFI_NATIVE_TOKEN_ADDRESS for native token)

  • to_token (str) – Destination token address (use LIFI_NATIVE_TOKEN_ADDRESS for native token)

  • from_amount (int) – Amount to send in raw units (wei for ETH)

  • from_address (str) – Sender wallet address

  • to_address (str | None) – Recipient wallet address. If None, defaults to from_address.

  • slippage (float) – Maximum allowed slippage as a decimal (0.03 = 3%)

  • order (str) – Route preference: CHEAPEST or FASTEST

  • api_timeout (float) – API request timeout in seconds

Returns

Quote with transaction data ready for signing

Raises

LifiAPIError – If the API returns an error or no route is found

Return type

eth_defi.lifi.quote.LifiQuote