Problem: Websocket blocks after terminating without unsubscribing

Closes: crypto-org-chain#207
Solution:
- backport the fix to 0.6.x

CHANGELOG.md

@@ -4,6 +4,14 @@
 
 ### Bug Fixes
 
+- (rpc) [cronos#]() fix newPendingTransactions subscription deadlock issue, backport the fix in ethermint.
+
+*February 18, 2022*
+
+## v0.6.6
+
+### Bug Fixes
+
 - (rpc) [cronos#343](https://github.com/crypto-org-chain/cronos/pull/343) newPendingTransactions filter should return ethereum tx hash.
 
 ### Improvements

go.mod

@@ -164,7 +164,7 @@ replace github.com/ethereum/go-ethereum => github.com/crypto-org-chain/go-ethere
 // TODO: remove when ibc-go and ethermint upgrades cosmos-sdk
 replace github.com/cosmos/cosmos-sdk => github.com/cosmos/cosmos-sdk v0.44.7-0.20220214161517-8a26cd10b4be
 
-replace github.com/tharsis/ethermint => github.com/crypto-org-chain/ethermint v0.7.2-cronos-8
+replace github.com/tharsis/ethermint => github.com/yihuang/ethermint v0.7.2-cronos-7.0.20220221042333-8fe755d23a29
 
 // Note: gorocksdb bindings for OptimisticTransactionDB are not merged upstream, so we use a fork
 // See https://github.com/tecbot/gorocksdb/pull/216

go.sum

@@ -237,8 +237,6 @@ github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:ma
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/crypto-org-chain/ethermint v0.7.2-cronos-8 h1:uYYprF6KqlJnnCM2dPtnf4g/0rxNoqG0yDPjqTPU0BA=
-github.com/crypto-org-chain/ethermint v0.7.2-cronos-8/go.mod h1:J96LX4KvLyl+5jV6+mt/4l6srtGX/mdDTuqQQuYrdDk=
 github.com/crypto-org-chain/go-ethereum v1.10.3-patched h1:kr6oQIYOi2VC8SZwkhlUDZE1Omit/YHVysKMgCB2nes=
 github.com/crypto-org-chain/go-ethereum v1.10.3-patched/go.mod h1:99onQmSd1GRGOziyGldI41YQb7EESX3Q4H41IfJgIQQ=
 github.com/crypto-org-chain/ibc-go v1.2.1-hooks h1:wuWaQqm/TFKJQwuFgjCPiPumQio+Yik5Z1DObDExrrU=
@@ -1024,6 +1022,8 @@ github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:
 github.com/xtaci/kcp-go v5.4.20+incompatible/go.mod h1:bN6vIwHQbfHaHtFpEssmWsN45a+AZwO7eyRCmEIbtvE=
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae/go.mod h1:gXtu8J62kEgmN++bm9BVICuT/e8yiLI2KFobd/TRFsE=
 github.com/ybbus/jsonrpc v2.1.2+incompatible/go.mod h1:XJrh1eMSzdIYFbM08flv0wp5G35eRniyeGut1z+LSiE=
+github.com/yihuang/ethermint v0.7.2-cronos-7.0.20220221042333-8fe755d23a29 h1:6Z3wLongbiQ2fMvSjUqMbFduDwd97r6b3LbXPvx+BaQ=
+github.com/yihuang/ethermint v0.7.2-cronos-7.0.20220221042333-8fe755d23a29/go.mod h1:J96LX4KvLyl+5jV6+mt/4l6srtGX/mdDTuqQQuYrdDk=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=