chore: extract logic from api layer into own module

Signed-off-by: Philipp Hoenisch <[email protected]>

mobile/native/src/api.rs

@@ -1,4 +1,5 @@
 use crate::calculations;
+use crate::channel_trade_constraints;
 use crate::commons::api::ChannelInfo;
 use crate::commons::api::Price;
 use crate::config;
@@ -439,50 +440,7 @@ pub struct TradeConstraints {
 }
 
 pub fn channel_trade_constraints() -> Result<TradeConstraints> {
-    let lsp_config =
-        crate::state::try_get_lsp_config().context("We can't trade without LSP config")?;
-
-    // TODO(bonomat): retrieve these values from the coordinator. This can come from the liquidity
-    // options.
-    let min_quantity = 100;
-
-    // TODO(bonomat): this logic should be removed once we have our liquidity options again and the
-    // on-boarding logic. For now we take the highest liquidity option
-    let option = lsp_config
-        .liquidity_options
-        .iter()
-        .filter(|option| option.active)
-        .max_by_key(|option| &option.trade_up_to_sats)
-        .context("we need at least one liquidity option")?;
-    let coordinator_leverage = option.coordinator_leverage;
-
-    let dlc_channels = ln_dlc::get_dlc_channels()?;
-
-    let maybe_channel = dlc_channels.first();
-
-    let trade_constraints = match maybe_channel {
-        None => {
-            let balance = ln_dlc::get_onchain_balance()?;
-            let counterparty_margin_sats = option.trade_up_to_sats;
-            TradeConstraints {
-                max_local_margin_sats: balance.confirmed
-                    + balance.trusted_pending
-                    + balance.untrusted_pending,
-
-                max_counterparty_margin_sats: counterparty_margin_sats,
-                coordinator_leverage,
-                min_quantity,
-                is_channel_balance: false,
-            }
-        }
-        Some(channel) => TradeConstraints {
-            max_local_margin_sats: channel.own_params.collateral,
-            max_counterparty_margin_sats: channel.counter_params.collateral,
-            coordinator_leverage,
-            min_quantity,
-            is_channel_balance: true,
-        },
-    };
+    let trade_constraints = channel_trade_constraints::channel_trade_constraints()?;
     Ok(trade_constraints)
 }
 

mobile/native/src/channel_trade_constraints.rs

@@ -0,0 +1,52 @@
+use crate::api::TradeConstraints;
+use crate::ln_dlc;
+use anyhow::Context;
+use anyhow::Result;
+
+pub fn channel_trade_constraints() -> Result<TradeConstraints> {
+    let lsp_config =
+        crate::state::try_get_lsp_config().context("We can't trade without LSP config")?;
+
+    // TODO(bonomat): retrieve these values from the coordinator. This can come from the liquidity
+    // options.
+    let min_quantity = 100;
+
+    // TODO(bonomat): this logic should be removed once we have our liquidity options again and the
+    // on-boarding logic. For now we take the highest liquidity option
+    let option = lsp_config
+        .liquidity_options
+        .iter()
+        .filter(|option| option.active)
+        .max_by_key(|option| &option.trade_up_to_sats)
+        .context("we need at least one liquidity option")?;
+    let coordinator_leverage = option.coordinator_leverage;
+
+    let dlc_channels = ln_dlc::get_dlc_channels()?;
+
+    let maybe_channel = dlc_channels.first();
+
+    let trade_constraints = match maybe_channel {
+        None => {
+            let balance = ln_dlc::get_onchain_balance()?;
+            let counterparty_margin_sats = option.trade_up_to_sats;
+            TradeConstraints {
+                max_local_margin_sats: balance.confirmed
+                    + balance.trusted_pending
+                    + balance.untrusted_pending,
+
+                max_counterparty_margin_sats: counterparty_margin_sats,
+                coordinator_leverage,
+                min_quantity,
+                is_channel_balance: false,
+            }
+        }
+        Some(channel) => TradeConstraints {
+            max_local_margin_sats: channel.own_params.collateral,
+            max_counterparty_margin_sats: channel.counter_params.collateral,
+            coordinator_leverage,
+            min_quantity,
+            is_channel_balance: true,
+        },
+    };
+    Ok(trade_constraints)
+}

mobile/native/src/lib.rs

@@ -23,6 +23,7 @@ mod orderbook;
     unused_qualifications
 )]
 mod bridge_generated;
+mod channel_trade_constraints;
 mod cipher;
 mod destination;
 mod storage;