Extend timestamp and blockNumber fields

[milkyklim]

Check if timestamp and blockNumber can be replaced with

type Transaction @entity {
  id: ID!
  timestamp: BigInt!
  blockNumber: BigInt!
}

Problem is that Graph can not filter on non-top level fields.

[milkyklim]

No, it's impossible https://discord.com/channels/438038660412342282/438070183794573313/769558549415723008.