import { BlockHash } from '@dedot/codecs';
import { DedotError } from '@dedot/utils';
export declare enum RetryStrategy {
    NOW = "NOW",// Retry immediately
    QUEUED = "QUEUED"
}
export declare class ChainHeadError extends DedotError {
    name: string;
    retryStrategy?: RetryStrategy | undefined;
}
/**
 * Operation Inaccessible Error
 *
 * Ref: https://paritytech.github.io/json-rpc-interface-spec/api/chainHead_v1_follow.html#operationinaccessible
 */
export declare class ChainHeadOperationInaccessibleError extends ChainHeadError {
    name: string;
    retryStrategy: RetryStrategy;
}
/**
 * Stop Error
 *
 * Ref: https://paritytech.github.io/json-rpc-interface-spec/api/chainHead_v1_follow.html#stop
 */
export declare class ChainHeadStopError extends ChainHeadError {
    name: string;
    retryStrategy: RetryStrategy;
}
/**
 * Operation Error
 * Ref: https://paritytech.github.io/json-rpc-interface-spec/api/chainHead_v1_follow.html#operationerror
 */
export declare class ChainHeadOperationError extends ChainHeadError {
    name: string;
}
/**
 * Limit Reached Error
 * Ref: https://paritytech.github.io/json-rpc-interface-spec/api/chainHead_v1_storage.html#limitreached
 */
export declare class ChainHeadLimitReachedError extends ChainHeadError {
    name: string;
    retryStrategy: RetryStrategy;
}
/**
 * Invalid Runtime Error
 * Ref: https://paritytech.github.io/json-rpc-interface-spec/api/chainHead_v1_storage.html#limitreached
 */
export declare class ChainHeadInvalidRuntimeError extends ChainHeadError {
    name: string;
}
export declare class ChainHeadBlockNotPinnedError extends ChainHeadError {
    name: string;
    hash: BlockHash;
    constructor(message: string, hash: BlockHash | string);
}
export declare class ChainHeadBlockPrunedError extends ChainHeadError {
    name: string;
}