Add Resend Information to Deliveries in Blockchain Watcher

[SamantaCasal]

Description

An issue has been identified where searching for the transaction hash of redelivery results in displaying the original delivery. EXAMPLE This problem arises because there is no indication within the transaction that it is a 'redelivery,' as there is no such concept—it is simply a second delivery for the same VAA. CONVO

Objective

Modify the backend system to include resend information tracked via Blockchain Watcher whenever a redelivery VAA is received from the relayers.

Requirements

1. Detect Redeliveries: Implement logic to detect when a redelivery VAA is received.
2. Update Data Structure: Modify the data structure to store resend information in the original delivery transaction.

Resources

ISSUE

[julianmerlo95]

We have talking with Martin and we resume this information about redelivery:

• The redelivery has an information about the original VAA
  • Original redeem tx: https://testnet.snowtrace.io/tx/0xabaa0f3de72c7837fcab6dcf6fb9fe9febe0713878e928f639bded3213c2220e
  • Redelivery redeem tx: https://testnet.snowtrace.io/tx/0x494544f8c01b3cda890306465879fd8e22b4109e4e95de8d15deb6c45fb77e8a?chainid=43113
• We need to figure out the next information with relayer:
  • Is posible identify the new VAA information inside with redelivery tx?
  • When we receive an redeliver the information inside deliveryOverrides in the same in all redelivery?

SOLUTION If we can identify the new VAA inside redelivery we can fix this issue but if we cannot we have two options:

• Skip the new redelivery tx because we send a wrong information to applications
• When receive the redelivery try to get the VAA information from one endpoint or something else (we need to investigate this option)

[julianmerlo95]

I was speaking with Mati and we have take the next notes:

• Since April there is only one case of redelivery according to what I found (therefore it is a borderline case that happens very rarely)
• DeliveryOverrides are always done when it is a redelivery, therefore we can use this as a basis to skip the redeem