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web3_subscriptions.ts
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web3_subscriptions.ts
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// eslint-disable-next-line max-classes-per-file
import { BlockOutput, SyncOutput } from 'web3-common';
import { HexString } from 'web3-utils';
import { Web3Subscription } from 'web3-core';
type CommonSubscriptionEvents = {
error: Error;
connected: number;
};
export class LogsSubscription extends Web3Subscription<
CommonSubscriptionEvents & {
data: any;
},
{
fromBlock?: number;
address?: HexString | HexString[];
topics?: (HexString | null)[];
}
> {
protected _buildSubscriptionParams() {
return ['logs', this.args] as ['logs', any];
}
public _processSubscriptionResult(data: any) {
this.emit('data', data);
}
public _processSubscriptionError(error: Error) {
this.emit('error', error);
}
}
export class NewPendingTransactionsSubscription extends Web3Subscription<
CommonSubscriptionEvents & {
data: HexString;
}
> {
// eslint-disable-next-line
protected _buildSubscriptionParams() {
return ['newPendingTransactions'] as ['newPendingTransactions'];
}
protected _processSubscriptionResult(data: string) {
this.emit('data', data);
}
protected _processSubscriptionError(error: Error) {
this.emit('error', error);
}
}
export class NewHeadsSubscription extends Web3Subscription<
CommonSubscriptionEvents & {
data: BlockOutput;
}
> {
// eslint-disable-next-line
protected _buildSubscriptionParams() {
return ['newHeads'] as ['newHeads'];
}
protected _processSubscriptionResult(data: BlockOutput) {
this.emit('data', data);
}
protected _processSubscriptionError(error: Error) {
this.emit('error', error);
}
}
export class SyncingSubscription extends Web3Subscription<
CommonSubscriptionEvents & {
data: SyncOutput;
changed: boolean;
}
> {
// eslint-disable-next-line
protected _buildSubscriptionParams() {
return ['syncing'] as ['syncing'];
}
protected _processSubscriptionResult(data: SyncOutput) {
this.emit('data', data);
}
protected _processSubscriptionError(error: Error) {
this.emit('error', error);
}
}