/**
 * Core bridge utilities — shared between x402 and MPP clients.
 *
 * Auto-discovers bridge info from the RelAI API and provides helpers
 * for executing cross-chain payments transparently.
 *
 * Usage (MPP):
 * ```ts
 * import { evmChargeWithBridge } from '@relai-fi/x402/mpp/with-bridge'
 * ```
 *
 * Usage (x402):
 * ```ts
 * import { createX402Client } from '@relai-fi/x402'
 * const client = createX402Client({ ..., bridge: { enabled: true } })
 * ```
 */
interface BridgeInfo {
    settleEndpoint: string;
    supportedSourceChains: string[];
    supportedSourceAssets: string[];
    payTo: Record<string, string>;
    feePayerSvm: string | null;
    feeBps: number;
    paymentFacilitator: string;
}
interface BridgeSettleRequest {
    /** x402 mode: base64-encoded payment header */
    sourcePayment?: string;
    /** MPP mode: source tx hash */
    sourceTxHash?: string;
    /** MPP mode: wallet address that sent the source tx */
    senderAddress?: string;
    /** MPP mode: signature of (sourceTxHash + JSON(targetAccept)) */
    senderSignature?: string;
    /** CAIP-2 source chain identifier */
    sourceChain: string;
    targetAccept: {
        scheme: 'exact';
        network: string;
        asset: string;
        payTo: string;
        amount: string;
    };
    /** x402 payment requirements (full 402 body) — needed by settle for x402 flow */
    requirements?: any;
    resource?: string;
    paymentFacilitator?: string | null;
}
interface BridgeSettleResponse {
    success?: boolean;
    targetTxId?: string;
    sourceTxId?: string;
    /** x402 payment header (returned by x402-flavored settle) */
    xPayment?: string;
}
/**
 * Fetch bridge info from the RelAI API (cached per base URL for 5 minutes).
 */
declare function getBridgeInfo(baseUrl?: string): Promise<BridgeInfo>;
/**
 * Call the bridge settle endpoint.
 */
declare function settleBridge(settleEndpoint: string, body: BridgeSettleRequest): Promise<BridgeSettleResponse>;
/**
 * Select a source chain from supported chains that matches the available wallet.
 */
declare function selectSourceChain(supportedChains: string[], hasEvmWallet: boolean, hasSolanaWallet: boolean, preferredSourceChainId?: number): {
    type: 'evm' | 'solana';
    chain: string;
} | null;
/**
 * Compute source amount including bridge fee.
 */
declare function computeSourceAmount(targetAmount: bigint, feeBps: number): bigint;
declare const DEFAULT_EVM_RPC: Record<string, string>;

export { type BridgeInfo, type BridgeSettleRequest, type BridgeSettleResponse, DEFAULT_EVM_RPC, computeSourceAmount, getBridgeInfo, selectSourceChain, settleBridge };