/**
 * Storage account ID calculation for NEAR bridge transfers
 */
/**
 * Transfer message type for storage account calculation
 */
export type TransferMessageForStorage = {
    token: string;
    amount: bigint;
    recipient: string;
    fee: {
        fee: bigint;
        native_fee: bigint;
    };
    sender: string;
    msg: string;
};
/**
 * Calculates the storage account ID for a transfer message
 *
 * This function replicates the Rust implementation:
 * 1. Serializes the transfer message using Borsh
 * 2. Hashes the serialized data with SHA256
 * 3. Converts the hash to hex to create an implicit NEAR account ID
 *
 * @param transferMessage - The transfer message data with bigint amounts
 * @param externalId - Optional caller-supplied identifier mixed into the hash so otherwise-identical
 *   transfers derive distinct storage accounts. Limited to `MAX_EXTERNAL_ID_LEN` (64) UTF-8 bytes.
 * @returns The calculated storage account ID as a hex string
 */
export declare function calculateStorageAccountId(transferMessage: TransferMessageForStorage, externalId?: string): string;
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