411 lines
12 KiB
TypeScript
411 lines
12 KiB
TypeScript
import { version } from "../_version.js";
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import { defineReadOnly } from "./properties.js";
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import type {
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TransactionRequest, TransactionReceipt, TransactionResponse
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} from "../providers/index.js";
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import type { FetchRequest, FetchResponse } from "./fetch.js";
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export type ErrorInfo<T> = Omit<T, "code" | "name" | "message">;
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// The type of error to use for various error codes
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const ErrorConstructors: Record<string, { new (...args: Array<any>): Error }> = { };
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ErrorConstructors.INVALID_ARGUMENT = TypeError;
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ErrorConstructors.NUMERIC_FAULT = RangeError;
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ErrorConstructors.BUFFER_OVERRUN = RangeError;
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/**
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* All errors emitted by ethers have an **ErrorCode** to help
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* identify and coalesce errors to simplfy programatic analysis.
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*
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* _property: ``"UNKNOWN_ERROR"``
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* This is a general puspose fallback when no other error makes sense
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* or the error wasn't expected
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*
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* _property: ``"NOT_IMPLEMENTED"``
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*/
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export type ErrorCode =
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// Generic Errors
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"UNKNOWN_ERROR" | "NOT_IMPLEMENTED" | "UNSUPPORTED_OPERATION" |
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"NETWORK_ERROR" | "SERVER_ERROR" | "TIMEOUT" | "BAD_DATA" |
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"CANCELLED" |
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// Operational Errors
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"BUFFER_OVERRUN" | "NUMERIC_FAULT" |
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// Argument Errors
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"INVALID_ARGUMENT" | "MISSING_ARGUMENT" | "UNEXPECTED_ARGUMENT" |
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"VALUE_MISMATCH" |
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// Blockchain Errors
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"CALL_EXCEPTION" | "INSUFFICIENT_FUNDS" | "NONCE_EXPIRED" |
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"REPLACEMENT_UNDERPRICED" | "TRANSACTION_REPLACED" |
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"UNPREDICTABLE_GAS_LIMIT" |
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"UNCONFIGURED_NAME" | "OFFCHAIN_FAULT" |
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// User Interaction
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"ACTION_REJECTED"
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;
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export interface EthersError<T extends ErrorCode = ErrorCode> extends Error {
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code: ErrorCode;
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// recover?: (...args: Array<any>) => any;
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info?: Record<string, any>;
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error?: Error;
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}
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// Generic Errors
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export interface UnknownError extends EthersError<"UNKNOWN_ERROR"> {
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[ key: string ]: any;
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}
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export interface NotImplementedError extends EthersError<"NOT_IMPLEMENTED"> {
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operation: string;
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}
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export interface UnsupportedOperationError extends EthersError<"UNSUPPORTED_OPERATION"> {
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operation: string;
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}
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export interface NetworkError extends EthersError<"NETWORK_ERROR"> {
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event: string;
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}
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export interface ServerError extends EthersError<"SERVER_ERROR"> {
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request: FetchRequest | string;
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response?: FetchResponse;
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}
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export interface TimeoutError extends EthersError<"TIMEOUT"> {
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operation: string;
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reason: string;
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request?: FetchRequest;
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}
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export interface BadDataError extends EthersError<"BAD_DATA"> {
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value: any;
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}
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export interface CancelledError extends EthersError<"CANCELLED"> {
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}
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// Operational Errors
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export interface BufferOverrunError extends EthersError<"BUFFER_OVERRUN"> {
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buffer: Uint8Array;
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length: number;
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offset: number;
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}
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export interface NumericFaultError extends EthersError<"NUMERIC_FAULT"> {
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operation: string;
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fault: string;
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value: any;
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}
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// Argument Errors
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export interface InvalidArgumentError extends EthersError<"INVALID_ARGUMENT"> {
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argument: string;
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value: any;
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info?: Record<string, any>
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}
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export interface MissingArgumentError extends EthersError<"MISSING_ARGUMENT"> {
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count: number;
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expectedCount: number;
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}
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export interface UnexpectedArgumentError extends EthersError<"UNEXPECTED_ARGUMENT"> {
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count: number;
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expectedCount: number;
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}
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// Blockchain Errors
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export interface CallExceptionError extends EthersError<"CALL_EXCEPTION"> {
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// The revert data
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data: string;
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// The transaction that triggered the exception
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transaction?: any;
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// The Contract, method and args used during invocation
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method?: string;
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signature?: string;
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args?: ReadonlyArray<any>;
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// The Solidity custom revert error
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errorSignature?: string;
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errorName?: string;
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errorArgs?: ReadonlyArray<any>;
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reason?: string;
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}
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//export interface ContractCallExceptionError extends CallExceptionError {
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// The transaction call
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// transaction: any;//ErrorTransaction;
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//}
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export interface InsufficientFundsError extends EthersError<"INSUFFICIENT_FUNDS"> {
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transaction: TransactionRequest;
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}
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export interface NonceExpiredError extends EthersError<"NONCE_EXPIRED"> {
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transaction: TransactionRequest;
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}
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export interface OffchainFaultError extends EthersError<"OFFCHAIN_FAULT"> {
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transaction?: TransactionRequest;
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reason: string;
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}
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export interface ReplacementUnderpricedError extends EthersError<"REPLACEMENT_UNDERPRICED"> {
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transaction: TransactionRequest;
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}
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export interface TransactionReplacedError extends EthersError<"TRANSACTION_REPLACED"> {
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cancelled: boolean;
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reason: "repriced" | "cancelled" | "replaced";
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hash: string;
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replacement: TransactionResponse;
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receipt: TransactionReceipt;
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}
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export interface UnconfiguredNameError extends EthersError<"UNCONFIGURED_NAME"> {
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value: string;
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}
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export interface UnpredictableGasLimitError extends EthersError<"UNPREDICTABLE_GAS_LIMIT"> {
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transaction: TransactionRequest;
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}
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export interface ActionRejectedError extends EthersError<"ACTION_REJECTED"> {
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action: string
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}
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// Coding; converts an ErrorCode its Typed Error
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/**
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* A conditional type that transforms the [[ErrorCode]] T into
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* its EthersError type.
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*
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* @flatworm-skip-docs
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*/
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export type CodedEthersError<T> =
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T extends "UNKNOWN_ERROR" ? UnknownError:
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T extends "NOT_IMPLEMENTED" ? NotImplementedError:
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T extends "UNSUPPORTED_OPERATION" ? UnsupportedOperationError:
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T extends "NETWORK_ERROR" ? NetworkError:
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T extends "SERVER_ERROR" ? ServerError:
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T extends "TIMEOUT" ? TimeoutError:
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T extends "BAD_DATA" ? BadDataError:
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T extends "CANCELLED" ? CancelledError:
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T extends "BUFFER_OVERRUN" ? BufferOverrunError:
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T extends "NUMERIC_FAULT" ? NumericFaultError:
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T extends "INVALID_ARGUMENT" ? InvalidArgumentError:
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T extends "MISSING_ARGUMENT" ? MissingArgumentError:
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T extends "UNEXPECTED_ARGUMENT" ? UnexpectedArgumentError:
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T extends "CALL_EXCEPTION" ? CallExceptionError:
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T extends "INSUFFICIENT_FUNDS" ? InsufficientFundsError:
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T extends "NONCE_EXPIRED" ? NonceExpiredError:
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T extends "OFFCHAIN_FAULT" ? OffchainFaultError:
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T extends "REPLACEMENT_UNDERPRICED" ? ReplacementUnderpricedError:
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T extends "TRANSACTION_REPLACED" ? TransactionReplacedError:
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T extends "UNCONFIGURED_NAME" ? UnconfiguredNameError:
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T extends "UNPREDICTABLE_GAS_LIMIT" ? UnpredictableGasLimitError:
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T extends "ACTION_REJECTED" ? ActionRejectedError:
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never;
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/**
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* Returns true if the %%error%% matches an error thrown by ethers
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* that matches the error %%code%%.
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*
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* In TypeScript envornoments, this can be used to check that %%error%%
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* matches an EthersError type, which means the expected properties will
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* be set.
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*
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* @See [ErrorCodes](api:ErrorCode)
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* @example
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* try {
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* // code....
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* } catch (e) {
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* if (isError(e, "CALL_EXCEPTION")) {
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* console.log(e.data);
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* }
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* }
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*/
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export function isError<K extends ErrorCode, T extends CodedEthersError<K>>(error: any, code: K): error is T {
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return (error && (<EthersError>error).code === code);
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}
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/**
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* Returns true if %%error%% is a [CALL_EXCEPTION](api:CallExceptionError).
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*/
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export function isCallException(error: any): error is CallExceptionError {
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return isError(error, "CALL_EXCEPTION");
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}
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/**
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* Returns a new Error configured to the format ethers emits errors, with
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* the %%message%%, [[api:ErrorCode]] %%code%% and additioanl properties
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* for the corresponding EthersError.
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*
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* Each error in ethers includes the version of ethers, a
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* machine-readable [[ErrorCode]], and depneding on %%code%%, additional
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* required properties. The error message will also include the %%meeage%%,
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* ethers version, %%code%% and all aditional properties, serialized.
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*/
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export function makeError<K extends ErrorCode, T extends CodedEthersError<K>>(message: string, code: K, info?: ErrorInfo<T>): T {
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{
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const details: Array<string> = [];
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if (info) {
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if ("message" in info || "code" in info || "name" in info) {
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throw new Error(`value will overwrite populated values: ${ JSON.stringify(info) }`);
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}
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for (const key in info) {
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const value = <any>(info[<keyof ErrorInfo<T>>key]);
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try {
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details.push(key + "=" + JSON.stringify(value));
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} catch (error) {
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details.push(key + "=[could not serialize object]");
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}
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}
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}
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details.push(`code=${ code }`);
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details.push(`version=${ version }`);
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if (details.length) {
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message += " (" + details.join(", ") + ")";
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}
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}
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const create = ErrorConstructors[code] || Error;
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const error = <T>(new create(message));
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defineReadOnly(error, "code", code);
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if (info) {
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for (const key in info) {
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defineReadOnly(error, <keyof T>key, <any>(info[<keyof ErrorInfo<T>>key]));
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}
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}
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return <T>error;
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}
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/**
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* Throws an EthersError with %%message%%, %%code%% and additional error
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* info.
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*
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* @see [[api:makeError]]
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*/
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export function throwError<K extends ErrorCode, T extends CodedEthersError<K>>(message: string, code: K, info?: ErrorInfo<T>): never {
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throw makeError(message, code, info);
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}
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/**
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* Throws an [[api:ArgumentError]] with %%message%% for the parameter with
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* %%name%% and the %%value%%.
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*/
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export function throwArgumentError(message: string, name: string, value: any): never {
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return throwError(message, "INVALID_ARGUMENT", {
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argument: name,
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value: value
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});
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}
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/**
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* A simple helper to simply ensuring provided arguments match expected
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* constraints, throwing if not.
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*
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* In TypeScript environments, the %%check%% has been asserted true, so
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* any further code does not need additional compile-time checks.
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*/
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export function assertArgument(check: unknown, message: string, name: string, value: unknown): asserts check {
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if (!check) { throwArgumentError(message, name, value); }
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}
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export function assertArgumentCount(count: number, expectedCount: number, message: string = ""): void {
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if (message) { message = ": " + message; }
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if (count < expectedCount) {
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throwError("missing arguemnt" + message, "MISSING_ARGUMENT", {
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count: count,
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expectedCount: expectedCount
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});
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}
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if (count > expectedCount) {
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throwError("too many arguemnts" + message, "UNEXPECTED_ARGUMENT", {
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count: count,
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expectedCount: expectedCount
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});
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}
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}
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const _normalizeForms = ["NFD", "NFC", "NFKD", "NFKC"].reduce((accum, form) => {
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try {
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// General test for normalize
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/* c8 ignore start */
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if ("test".normalize(form) !== "test") { throw new Error("bad"); };
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/* c8 ignore stop */
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if (form === "NFD") {
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const check = String.fromCharCode(0xe9).normalize("NFD");
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const expected = String.fromCharCode(0x65, 0x0301)
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/* c8 ignore start */
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if (check !== expected) { throw new Error("broken") }
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/* c8 ignore stop */
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}
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accum.push(form);
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} catch(error) { }
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return accum;
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}, <Array<string>>[]);
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/**
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* Throws if the normalization %%form%% is not supported.
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*/
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export function assertNormalize(form: string): void {
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if (_normalizeForms.indexOf(form) === -1) {
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throwError("platform missing String.prototype.normalize", "UNSUPPORTED_OPERATION", {
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operation: "String.prototype.normalize", info: { form }
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});
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}
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}
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/**
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* Many classes use file-scoped values to guard the constructor,
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* making it effectively private. This facilitates that pattern
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* by ensuring the %%givenGaurd%% matches the file-scoped %%guard%%,
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* throwing if not, indicating the %%className%% if provided.
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*/
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export function assertPrivate(givenGuard: any, guard: any, className: string = ""): void {
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if (givenGuard !== guard) {
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let method = className, operation = "new";
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if (className) {
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method += ".";
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operation += " " + className;
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}
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throwError(`private constructor; use ${ method }from* methods`, "UNSUPPORTED_OPERATION", {
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operation
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});
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}
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}
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