fixed ChainParams equality check and added changelog entry

changelog.md

@@ -21,6 +21,7 @@
 
 ### Fixes
 
+* [1576](https://github.com/zeta-chain/node/pull/1576) - Fix zetaclient crash due to out of bound integer conversion and log prints.
 * [1554](https://github.com/zeta-chain/node/pull/1554) - Screen out unconfirmed UTXOs that are not created by TSS itself
 * [1560](https://github.com/zeta-chain/node/issues/1560) - Zetaclient post evm-chain outtx hashes only when receipt is available
 * [1516](https://github.com/zeta-chain/node/issues/1516) - Unprivileged outtx tracker removal

zetaclient/zetacore_observer.go

@@ -356,7 +356,7 @@ func (co *CoreObserver) getUpdatedChainOb(chainID int64) (ChainClient, error) {
 	curParams := chainOb.GetChainParams()
 	if common.IsEVMChain(chainID) {
 		evmCfg, found := co.cfg.GetEVMConfig(chainID)
-		if found && curParams != evmCfg.ChainParams {
+		if found && curParams.String() != evmCfg.ChainParams.String() {
 			chainOb.SetChainParams(evmCfg.ChainParams)
 			co.logger.ZetaChainWatcher.Info().Msgf(
 				"updated chain params for chainID %d, new params: %v",
@@ -366,7 +366,7 @@ func (co *CoreObserver) getUpdatedChainOb(chainID int64) (ChainClient, error) {
 		}
 	} else if common.IsBitcoinChain(chainID) {
 		_, btcCfg, found := co.cfg.GetBTCConfig()
-		if found && curParams != btcCfg.ChainParams {
+		if found && curParams.String() != btcCfg.ChainParams.String() {
 			chainOb.SetChainParams(btcCfg.ChainParams)
 			co.logger.ZetaChainWatcher.Info().Msgf(
 				"updated chain params for Bitcoin, new params: %v",