/** Plugin to fetch status of many transactions from a remote source. */
export interface ITxStatusSource {
    /** Example: axelar */
    readonly keyPrefix: string;
    readonly sourceDisplayName?: string;
    /** Destination for updates to tracked transactions.  */
    statusReceiverDelegate?: ITxStatusReceiver;
    /**
     * Source instance should begin tracking a transaction identified by `key`.
     * @param key Example: Tx hash without prefix i.e. `0x...`
     */
    trackTxStatus(key: string): void;
    /** Make url to this tx explorer. */
    makeExplorerUrl(key: string): string;
}
export interface ITxStatusReceiver {
    /** Key with prefix (`keyPrefix`) included. */
    receiveNewTxStatus(prefixedKey: string, status: TxStatus, displayReason?: string): void;
}
export declare type TxStatus = "success" | "pending" | "failed";
export declare type TxReason = "insufficientFee";