Graceful handling of packet events in the presence of multiple relayers

[ancazamfir]

Crate

relayer

Summary

Before processing a packet event hermes should verify that the event has not been already processed.

Problem Definition

Currently the relayer retries multiple times without checking if the event has been processed already. This happens for all events except the WriteAcknowledgmentEv

Proposal

Acceptance Criteria

Run multiple relayers with different accounts. Send a number of packets and make sure the slower instance doesn't retry more than once.
Perform the tests for recv, ack and timeout packets

---

For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate milestone (priority) applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned