feat(bundle-cost): find proposal tx from number via proposer

proposals/61:lo-bundle-cost/.gitignore

@@ -0,0 +1,2 @@
+proposer-61.json
+tx-hist-proposer-61.json

proposals/61:lo-bundle-cost/Makefile

@@ -6,19 +6,22 @@
 lower-bundle-cost.json: tx-61.json
 	jq '.tx.body.messages[0].content | .changes[0].value |= fromjson' tx-61.json >$@
 
-# To get the hash of the tx for proposal 61,
-# we found the proposer (either using an explorer or
-# `agd --node $ARCHIVE_NODE query gov proposer 61`)
-# and looked at their transaction history.
-hash=6EA7B46DFDD0973338BB50781B33D651FE0E8EE8ABF4D7BCB1BF8235334AAFE0
-ARCHIVE_NODE="https://main-a.rpc.agoric.net:443"
-tx-61.json:
-	agd --node $(ARCHIVE_NODE) query tx $(hash) -o json >$@
+PROPOSAL=61
+proposer-61.json:
+	agd --node $(ARCHIVE_NODE) query gov proposer $(PROPOSAL) -o json >$@
+
+tx-hist-proposer-61.json: proposer-61.json
+	PROPOSER="$$(jq -r .proposer proposer-61.json)"; \
+	agd --node $(ARCHIVE_NODE) query txs --events="message.sender=$$PROPOSER" -o json >$@
+
+tx-61.json: tx-hist-proposer-61.json
+	jq '.txs | .[] | select(.tx.body.messages[0].content["@type"] == "/cosmos.params.v1beta1.ParameterChangeProposal")' \
+		tx-hist-proposer-61.json >$@
 
 # clean up locally computed files
 clean:
 	rm -f lower-bundle-cost.json
 
 # clean up files cached from the network as well
 realclean: clean
-	rm -f tx-61.json
+	rm -f tx-61.json proposer-61.json tx-hist-proposer-61.json