indexer: replace failed tx

[pro-wh]

handle cases where an earlier sighting of a tx failed and a later sighting succeeded

[codecov]

Codecov Report

Merging #207 (0b9b644) into main (b542c5e) will decrease coverage by 0.42%.
The diff coverage is 13.33%.

@@            Coverage Diff             @@
##             main     #207      +/-   ##
==========================================
- Coverage   60.49%   60.06%   -0.43%     
==========================================
  Files          24       24              
  Lines        2721     2747      +26     
==========================================
+ Hits         1646     1650       +4     
- Misses        897      917      +20     
- Partials      178      180       +2     

Impacted Files	Coverage Δ
indexer/utils.go	71.55% <13.33%> (-4.86%)	⬇️

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