/**
 * Retrieves the current FCT mint rate from the L1 block contract.
 *
 * @param l1ChainId - The chain ID of the L1 network (1 for Ethereum mainnet, 11155111 for Sepolia testnet)
 * @returns A Promise that resolves to the current FCT mint rate as a bigint
 */
export declare const getFctMintRate: (l1ChainId: 1 | 11155111) => Promise<bigint>;