Add a --denom option to the tx raw upgrade-chain command to make the deposit denomination configurable

.changelog/unreleased/breaking-changes/ibc-relayer/1662-configurable-upgrade-denom.md

@@ -0,0 +1,2 @@
+- Added a `denom` member to `upgrade_chain::UpgradePlanOptions`.
+  ([#1662](https://github.com/informalsystems/ibc-rs/issues/1662))

.changelog/unreleased/improvements/ibc-relayer-cli/1662-configurable-upgrade-denom.md

@@ -0,0 +1,2 @@
+- Make the deposit denomination configurable in `tx raw upgrade-chain` via a new `--denom` flag.
+  ([#1662](https://github.com/informalsystems/ibc-rs/issues/1662))

relayer-cli/src/commands/tx/upgrade.rs

@@ -64,6 +64,13 @@ pub struct TxIbcUpgradeChainCmd {
     )]
     upgrade_name: Option<String>,
 
+    #[clap(
+        short = 'd',
+        long,
+        help = "denomination for the deposit (default: 'stake')"
+    )]
+    denom: Option<String>,
+
     #[clap(
         short = 'l',
         long,
@@ -93,6 +100,7 @@ impl TxIbcUpgradeChainCmd {
             src_chain_config: src_chain_config.clone(),
             src_client_id: self.src_client_id.clone(),
             amount: self.amount,
+            denom: self.denom.as_deref().unwrap_or("stake").into(),
             height_offset: self.height_offset,
             upgraded_chain_id: self
                 .new_chain_id

relayer/src/upgrade_chain.rs

@@ -54,6 +54,7 @@ pub struct UpgradePlanOptions {
     pub dst_chain_config: ChainConfig,
     pub src_client_id: ClientId,
     pub amount: u64,
+    pub denom: String,
     pub height_offset: u64,
     pub upgraded_chain_id: ChainId,
     pub upgraded_unbonding_period: Option<Duration>,
@@ -115,7 +116,7 @@ pub fn build_and_send_ibc_upgrade_proposal(
     let proposer = dst_chain.get_signer().map_err(UpgradeChainError::key)?;
 
     let coins = ibc_proto::cosmos::base::v1beta1::Coin {
-        denom: "stake".to_string(),
+        denom: opts.denom.clone(),
         amount: opts.amount.to_string(),
     };