fix: catch eth error

[notanatol]

Checklist

• I have read the coding guide

Description

we get inconsistent behavior when checking for synced status, this change will discriminate ethereum errors

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This change is 

[mrekucci]

Reviewed all commit messages.
Reviewable status: 0 of 1 files reviewed, 1 unresolved discussion (waiting on @mrekucci and @ralph-pichler)

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pkg/transaction/backend.go, line 53 at r1 (raw file):

Previously, notanatol (Anatol) wrote…

extracted the check to reduce nesting

Another way could be:

if errors.Is(err, ethereum.NotFound) {
    err = nil
}
return false, time.Time{}, err