Scripts for patching swapped balances

[psteckler]

Two scripts to help patching swapped fee transfer balances in the archive db.

find-swapped-balances.awk is an AWK script that isolates the replayer log entries with the information needed to patch pairs of swapped balances. You run the script on the replayer log, and you get relevant logs with the block state hash and sequence number, plus the logs showing the balance mismatch. (Funny enough, this script revealed that one pair of swapped balances had identical amounts.)

fix-swapped-balances.sh patches all swapped balances an archive db through the first canonical block on April 7, 2021. We announced v1.1.5 later that day. Anyone who upgraded soon after the release should have few remaining invalid balances, after running this script.

Tested by:

• dumping the mainnet archive db
• running replayer on that db, with the target state hash
• running the AWK script on the replayer log
• creating the fix script from the AWK output
• running the fix script, and re-running the replayer to verify there are no remaining errors