WS Subscriptions are not awaited, thus errors cannot be handled

[mkykadir]

Ethers Version

5.7.2

Search Terms

websocket, provider

Describe the Problem

Subscription to an event, i.e. newheads and logs may end up with error on provider side; since subscription is not awaited, errors cannot be handled and drops to "unhandled promise rejection"

Following _subscribes within _startEvent should be awaited

ethers.js/packages/providers/src.ts/websocket-provider.ts

Lines 248 to 256 in 0bfa7f4

	_startEvent(event: Event): void {
	switch (event.type) {
	case "block":
	this._subscribe("block", [ "newHeads" ], (result: any) => {
	const blockNumber = BigNumber.from(result.number).toNumber();
	this._emitted.block = blockNumber;
	this.emit("block", blockNumber);
	});
	break;

Code Snippet

No response

Contract ABI

No response

Errors

Unhandled Rejection: [object Promise], Error: Unsupported subcription: logs

Environment

node.js (v12 or newer)

Environment (Other)

No response