/**
 * Payload decoding for LayerZero Scan messages.
 *
 * Uses SDK-internal decode functions directly rather than re-implementing them.
 */
import type { EvmReadProvider, Hex } from "../../types/evm.js";
import type { TokenEntry } from "../../registry/types.js";
import type { BridgeRequestSummary, SendPayloadSummary, TokenMetadata } from "./types.js";
/**
 * Attempt to decode a BridgeRequest from a compose message.
 * Returns `null` when the message is empty or cannot be decoded.
 */
export declare function tryDecodeBridgeRequest(composeMsg: Hex): BridgeRequestSummary | null;
/**
 * Decode a send() transaction's calldata into a summary.
 */
export declare function decodeSendSummary(data: Hex): SendPayloadSummary;
/**
 * Fetch the OFTSent amount from a transaction receipt.
 *
 * Requires `provider.getTransactionReceipt` to be available.
 * Returns `undefined` when the provider does not support it or no event is found.
 */
export declare function fetchOftSentAmount(provider: EvmReadProvider, txHash: string): Promise<bigint | undefined>;
/**
 * Check whether a value is a strict hex string (0x-prefixed).
 * @internal
 */
export declare function isHexStrict(value?: string | null): value is Hex;
/**
 * Enrich a send summary with token metadata (decimals, dust-removed amounts).
 */
export declare function decorateSendSummary(summary: SendPayloadSummary, token?: TokenEntry, fetchMetadata?: (token: TokenEntry) => Promise<TokenMetadata | null>): Promise<SendPayloadSummary>;
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