fix: add FeeTier support to galileo tx sending

During Testnet 77 we enabled fees [0] and in the process broke some
things like Galileo. Adding FeeTier support is rather straightforward,
although this changeset requires a patch to the `penumbra-fee` crate in
order to compile [1].

[0] penumbra-zone/penumbra#4306
[1] penumbra-zone/penumbra#4539

Cargo.toml

@@ -15,6 +15,7 @@ parallel = ["penumbra-wallet/parallel"]
 # Penumbra dependencies
 penumbra-proto = { path = "../penumbra/crates/proto", features = ["rpc", "box-grpc"] }
 penumbra-asset = { path = "../penumbra/crates/core/asset" }
+penumbra-fee = { path = "../penumbra/crates/core/component/fee" }
 penumbra-keys = { path = "../penumbra/crates/core/keys" }
 penumbra-custody = { path = "../penumbra/crates/custody" }
 penumbra-wallet = { path = "../penumbra/crates/wallet" }

src/opt/serve.rs

@@ -27,9 +27,6 @@ use crate::{
 
 #[derive(Debug, Clone, Parser)]
 pub struct Serve {
-    /// The transaction fee for each response (paid in upenumbra).
-    #[structopt(long, default_value = "0")]
-    fee: u64,
     /// Per-user rate limit (e.g. "10m" or "1day").
     #[clap(short, long, default_value = "1day", parse(try_from_str = humantime::parse_duration))]
     rate_limit: Duration,

src/sender.rs

@@ -11,6 +11,8 @@ use penumbra_proto::view::v1::broadcast_transaction_response::Status as Broadcas
 
 use penumbra_asset::Value;
 use penumbra_custody::{AuthorizeRequest, CustodyClient};
+use penumbra_fee::FeeTier;
+use penumbra_fee::GasPrices;
 use penumbra_keys::{Address, FullViewingKey};
 use penumbra_txhash::TransactionId;
 use penumbra_view::ViewClient;
@@ -70,7 +72,19 @@ where
                     "tried to send empty list of values to address"
                 ));
             }
+
             let mut planner = Planner::new(OsRng);
+
+            // Here we hardcode low fees. It'd be nice to override via CLI arg.
+            // Look up GasPrices, because merely calling `set_fee_tier` is not sufficient.
+            let gp: GasPrices = self2
+                .view
+                .gas_prices()
+                .await
+                .expect("failed to look up GasPrices");
+            planner.set_gas_prices(gp);
+            planner.set_fee_tier(FeeTier::Low);
+
             for value in values {
                 planner.output(value, address.clone());
             }