forked from tornadocash/nova-ui
86 lines
2.3 KiB
JavaScript
86 lines
2.3 KiB
JavaScript
import { ethers } from 'ethers'
|
|
import { fetchJson } from 'ethers/lib/utils'
|
|
import { numbers } from './constants'
|
|
|
|
const defaultRetryAttempt = 0
|
|
|
|
export class ExtendedProvider extends ethers.providers.StaticJsonRpcProvider {
|
|
constructor(url, network, fallbackRpcs) {
|
|
super(url, network)
|
|
this.fallbackRpcs = fallbackRpcs
|
|
}
|
|
|
|
async send(method, params, retryAttempt = defaultRetryAttempt) {
|
|
try {
|
|
return await super.send(method, params)
|
|
} catch (err) {
|
|
if (!retryAttempt) {
|
|
const TIME_OUT = 3000
|
|
|
|
await this.sleep(TIME_OUT)
|
|
|
|
if (this.fallbackRpcs) {
|
|
return await this.fallbackSend(method, params, this.fallbackRpcs)
|
|
}
|
|
return this.send(method, params, ++retryAttempt)
|
|
}
|
|
throw err
|
|
}
|
|
}
|
|
|
|
// eslint-disable-next-line
|
|
async fallbackSend(method, params, fallbackRpcs, retryAttempt = defaultRetryAttempt) {
|
|
|
|
function getResult(payload) {
|
|
if (payload.error) {
|
|
const error = new Error(payload.error.message)
|
|
error.code = payload.error.code
|
|
error.data = payload.error.data
|
|
// eslint-disable-next-line @typescript-eslint/no-throw-literal
|
|
throw error
|
|
}
|
|
return payload.result
|
|
}
|
|
|
|
try {
|
|
const request = {
|
|
method: method,
|
|
params: params,
|
|
id: this._nextId + numbers.ONE,
|
|
jsonrpc: '2.0',
|
|
}
|
|
|
|
const result = fetchJson({ url: fallbackRpcs[retryAttempt] }, JSON.stringify(request), getResult).then(
|
|
(result) => result,
|
|
(error) => {
|
|
throw error
|
|
},
|
|
)
|
|
|
|
return await result
|
|
} catch (err) {
|
|
retryAttempt += numbers.ONE
|
|
if (!fallbackRpcs[retryAttempt]) {
|
|
throw err
|
|
} else {
|
|
return await this.fallbackSend(method, params, fallbackRpcs, retryAttempt)
|
|
}
|
|
}
|
|
}
|
|
|
|
async sleep(ms) {
|
|
return await new Promise((resolve) => setTimeout(resolve, ms))
|
|
}
|
|
|
|
// private checkRpcError(err: { data: string; code: string; message: string }) {
|
|
// const code = String(err?.code)
|
|
// const data = err.data?.toLowerCase()
|
|
// const message = err.message?.toLowerCase()
|
|
|
|
// const ERROR_DATA = 'too many concurrent request'
|
|
// const ERROR_MESSAGE = 'timeout'
|
|
// const ERROR_CODE = '-32017'
|
|
|
|
// return (data?.includes(ERROR_DATA) || message?.includes(ERROR_MESSAGE)) && code === ERROR_CODE
|
|
// }
|
|
} |