Implement ability to select specific wallet for packet clearing CLI

.changelog/unreleased/ibc-relayer-cli/2111-packet-clearing-select-specific-wallet.md

@@ -0,0 +1 @@
+- Add support for selecting a specific wallet in the `clear packets` CLI flow ([#2111](https://github.com/informalsystems/ibc-rs/issues/2111))

docs/architecture/adr-010-unified-cli-arguments-hermes.md

@@ -86,7 +86,8 @@ The following commands are implemented, with the binary name `hermes` often omit
 
 ### Clear packets
 
-* `clear packets --chain <CHAIN_ID> --port <PORT_ID> --channel <CHANNEL_ID>`
+* `clear packets --chain <CHAIN_ID> --port <PORT_ID> --channel <CHANNEL_ID>
+  --key-name <KEY> --counterparty-key-name <KEY>`
 
 ### Queries
 
@@ -195,4 +196,4 @@ The PR which updates the flags for all the commands as described in this ADR: [#
 
 ## References
 
-* Proposal in issue: [#2239](https://github.com/informalsystems/ibc-rs/issues/2239)
+* Proposal in issue: [#2239](https://github.com/informalsystems/ibc-rs/issues/2239)

guide/src/commands/relaying/clear.md

@@ -17,10 +17,15 @@ DESCRIPTION:
 
     The channel is identified by the chain, port, and channel IDs at one of its ends
 
+OPTIONS:
+    -h, --help           Print help information
+
 FLAGS:
-        --chain <CHAIN_ID>        Identifier of the chain
-        --channel <CHANNEL_ID>    Identifier of the channel
-        --port <PORT_ID>          Identifier of the port
+        --chain <CHAIN_ID>               Identifier of the chain
+        --channel <CHANNEL_ID>           Identifier of the channel
+        --port <PORT_ID>                 Identifier of the port
+        --key-name <KEY>                 Use the given signing key for the specified chain (default: `key_name` config)
+        --counterparty-key-name <KEY>    Use the given signing key for the counterparty chain (default: `key_name` config)
 ```
 
 ### Example
@@ -437,4 +442,3 @@ Success: [
 2022-02-24T14:21:28.874190Z  INFO ThreadId(01) using default configuration from '/Users/coromac/.hermes/config.toml'
 Success: []
 ```
-

relayer-cli/src/commands/clear.rs

@@ -1,9 +1,11 @@
 use abscissa_core::clap::Parser;
-use abscissa_core::{Command, Runnable};
+use abscissa_core::config::Override;
+use abscissa_core::{Command, FrameworkErrorKind, Runnable};
 
 use ibc::core::ics24_host::identifier::{ChainId, ChannelId, PortId};
 use ibc::events::IbcEvent;
-use ibc_relayer::chain::handle::BaseChainHandle;
+use ibc_relayer::chain::handle::{BaseChainHandle, ChainHandle};
+use ibc_relayer::config::Config;
 use ibc_relayer::link::error::LinkError;
 use ibc_relayer::link::{Link, LinkParameters};
 
@@ -21,7 +23,7 @@ pub enum ClearCmds {
     Packets(ClearPacketsCmd),
 }
 
-#[derive(Debug, Parser)]
+#[derive(Debug, Parser, Command)]
 pub struct ClearPacketsCmd {
     #[clap(
         long = "chain",
@@ -47,6 +49,35 @@ pub struct ClearPacketsCmd {
         help = "Identifier of the channel"
     )]
     channel_id: ChannelId,
+
+    #[clap(
+        long,
+        help = "use the given signing key for the specified chain (default: `key_name` config)"
+    )]
+    key_name: Option<String>,
+
+    #[clap(
+        long,
+        help = "use the given signing key for the counterparty chain (default: `counterparty_key_name` config)"
+    )]
+    counterparty_key_name: Option<String>,
+}
+
+impl Override<Config> for ClearPacketsCmd {
+    fn override_config(&self, mut config: Config) -> Result<Config, abscissa_core::FrameworkError> {
+        let chain_config = config.find_chain_mut(&self.chain_id).ok_or_else(|| {
+            FrameworkErrorKind::ComponentError.context(format!(
+                "missing configuration for chain '{}'",
+                self.chain_id
+            ))
+        })?;
+
+        if let Some(ref key_name) = self.key_name {
+            chain_config.key_name = key_name.to_string();
+        }
+
+        Ok(config)
+    }
 }
 
 impl Runnable for ClearPacketsCmd {
@@ -63,6 +94,17 @@ impl Runnable for ClearPacketsCmd {
             Err(e) => Output::error(format!("{}", e)).exit(),
         };
 
+        // If `counterparty_key_name` is provided, fetch the counterparty chain's
+        // config and overwrite its `key_name` parameter
+        if let Some(ref counterparty_key_name) = self.counterparty_key_name {
+            match chains.dst.config() {
+                Ok(mut dst_chain_cfg) => {
+                    dst_chain_cfg.key_name = counterparty_key_name.to_string();
+                }
+                Err(e) => Output::error(format!("{}", e)).exit(),
+            }
+        }
+
         let mut ev_list = vec![];
 
         // Construct links in both directions.