TL;DR, I think we want to start with a pure current snapshot of the account state, and apply any changes post-facto.
part 1: given a block height (the latest blockheight that you know), export the current account state. I believe there is already some feature written to export state (and side note, it probably doesn't use RPC)--used to generate the genesis.json from cosmoshub-3. Test it out at a recent block height. Check it against production data; for example, does it show the amount of tokens held in IBC channels to osmosis? Upload the snapshot to S3 or some other file storage provider.
SOLUTION:
gaiad export --height will export state in json. It can be used as a genesis state to bootstrap a node.
curl https://github.com/cosmos/vega-test/blob/66e7ccf559998d48a5bd230a3e6146bed856a83b/exported_unmodified_genesis.json.gz
unzip ./exported_unmodified_genesis.json.gz
"genesis_time", 2019-12-11T16:11:34Z
"initial_height", 7,368,387
The state was exported after the Delta (Gravity DEX) 13/07/21 6,910,000 cosmoshub-4 v0.34.x
-
find all accounts with ibc balances
time jq '.app_state.bank.balances' exported_unmodified_genesis.json > balances.json real 0m19.118s user 0m17.170s sys 0m1.455s time jq '.[] |select(.coins[].denom != "uatom")' balances.json > ibc_balances.json real 0m2.330s user 0m2.095s sys 0m0.213s -
find accounts holding OSMO tokens
time jq '.[] |select(.coins[].denom == "ibc/14F9BC3E44B8A9C1BE1FB08980FAB87034C9905EF17CF2F5008FC085218811CC")' -s . ibc_balances.json > ibc_osmo_balances.json real 0m0.170s user 0m0.144s sys 0m0.014s
The token name and denom mapping can be found here token hub