Set the denom metadata for the cosmoshub in the stargate migration (#564

)

* Set the denom metadata for the cosmoshub in the stargate migration

* Update app/migrate.go

* changelog

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Federico Kunze <federico.kunze94@gmail.com>

CHANGELOG.md

@@ -36,6 +36,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+### Improvements
+
+* (app) [\#564](https://github.com/cosmos/gaia/pull/564) Add client denomination metadata for atoms.
+
 ### Bug Fixes
 
 * (cmd) [\#563](https://github.com/cosmos/gaia/pull/563) Add balance coin to supply when adding a new genesis account

app/migrate.go

@@ -130,6 +130,24 @@ $ %s migrate /path/to/genesis.json --chain-id=cosmoshub-4 --genesis-time=2019-04
 
 			}
 
+			var bankGenesis bank.GenesisState
+
+			clientCtx.JSONMarshaler.MustUnmarshalJSON(newGenState[bank.ModuleName], &bankGenesis)
+
+			bankGenesis.DenomMetadata = []bank.Metadata{
+				{
+					Description: "The native staking token of the Cosmos Hub.",
+					DenomUnits: []*bank.DenomUnit{
+						{Denom: "uatom", Exponent: uint32(0), Aliases: []string{"microatom"}},
+						{Denom: "matom", Exponent: uint32(3), Aliases: []string{"milliatom"}},
+						{Denom: "atom", Exponent: uint32(6), Aliases: []string{}},
+					},
+					Base:    "uatom",
+					Display: "atom",
+				},
+			}
+			newGenState[bank.ModuleName] = clientCtx.JSONMarshaler.MustMarshalJSON(&bankGenesis)
+
 			var stakingGenesis staking.GenesisState
 
 			clientCtx.JSONMarshaler.MustUnmarshalJSON(newGenState[staking.ModuleName], &stakingGenesis)