/**
 * BSC trade preflight + quote helpers.
 *
 * Safety-first scope:
 * - No execution/signing here.
 * - Validate wallet/rpc/chain/gas/token before producing a quote.
 */
import type { BscTradePreflightResponse, BscTradeQuoteRequest, BscTradeQuoteResponse, BscUnsignedApprovalTx, BscUnsignedTradeTx } from "../contracts/wallet.js";
export declare const PANCAKE_SWAP_V2_ROUTER: string;
export declare const BSC_WBNB_FALLBACK: string;
export interface BscTradeRpcConfig {
    rpcUrls?: string[] | null;
    nodeRealBscRpcUrl?: string | null;
    quickNodeBscRpcUrl?: string | null;
    bscRpcUrl?: string | null;
    cloudManagedAccess?: boolean | null;
}
export interface BuildBscTradePreflightInput extends BscTradeRpcConfig {
    walletAddress: string | null;
    tokenAddress?: string | null;
}
export interface BuildBscTradeQuoteInput extends BscTradeRpcConfig {
    walletAddress: string | null;
    request: BscTradeQuoteRequest;
}
export declare function resolveBscRpcUrls(input: BscTradeRpcConfig): string[];
export declare function resolvePrimaryBscRpcUrl(input: BscTradeRpcConfig): string | null;
export declare function readTokenDecimals(rpcUrls: string[], tokenAddress: string): Promise<number>;
export declare function buildBscTradePreflight(input: BuildBscTradePreflightInput): Promise<BscTradePreflightResponse>;
export declare function buildBscTradeQuote(input: BuildBscTradeQuoteInput): Promise<BscTradeQuoteResponse>;
export declare function buildBscBuyUnsignedTx(quote: BscTradeQuoteResponse, recipientAddress: string | null, deadlineSeconds?: number): BscUnsignedTradeTx;
export declare function buildBscSellUnsignedTx(quote: BscTradeQuoteResponse, recipientAddress: string | null, deadlineSeconds?: number): BscUnsignedTradeTx;
export declare function buildBscApproveUnsignedTx(tokenAddress: string, ownerAddress: string | null, spenderAddress: string, amountWei: string): BscUnsignedApprovalTx;
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