Utility native <> printable functions

tauri-wallet/src-tauri/src/main.rs

@@ -4,11 +4,11 @@
 )]
 
 use bip39::Mnemonic;
+use cosmos_sdk::{AccountId, Coin, Decimal};
 use error::BackendError;
 use std::collections::HashMap;
 use std::str::FromStr;
 use validator_client::nymd::{NymdClient, SigningNymdClient};
-use cosmos_sdk::AccountId;
 
 mod config;
 mod error;
@@ -31,6 +31,76 @@ macro_rules! format_err {
   };
 }
 
+fn printable_coin(coin: Option<Coin>) -> Result<String, String> {
+  if let Some(coin) = coin {
+    let amount = match native_to_printable(&coin.amount.to_string()) {
+      Ok(amount) => amount,
+      Err(e) => return Err(e),
+    };
+    let ticker = if coin.denom.to_string().starts_with("u") {
+      coin.denom.to_string()[1..].to_uppercase()
+    } else {
+      coin.denom.to_string().to_uppercase()
+    };
+    Ok(format!("{} {}", amount, ticker))
+  } else {
+    Ok("0".to_string())
+  }
+}
+
+fn printable_balance(balance: Option<Vec<Coin>>) -> Result<String, String> {
+  if let Some(balance) = balance {
+    if !balance.is_empty() {
+      return Ok(
+        balance
+          .into_iter()
+          .map(|coin| match printable_coin(Some(coin)) {
+            Ok(native) => native,
+            Err(e) => e,
+          })
+          .collect::<Vec<String>>()
+          .join(", "),
+      );
+    }
+  }
+  Ok("-".to_string())
+}
+
+// converts display amount, such as "12.0346" to its native token representation,
+// with 6 fractional digits. So in that case it would result in "12034600"
+// Basically does the same job as `displayAmountToNative` but without the requirement
+// of having the coinMap
+#[tauri::command]
+fn printable_balance_to_native(amount: &str) -> Result<String, String> {
+  match amount.parse::<f64>() {
+    Ok(f) => match Decimal::from_str(&(f * 1_000_000.).to_string()) {
+      Ok(amount) => Ok(amount.to_string()),
+      Err(e) => Err(format_err!(format!(
+        "Could not convert `{}` to Decimal",
+        amount
+      ))),
+    },
+    Err(e) => Err(format_err!(format!(
+      "Could not convert `{}` to f64",
+      amount
+    ))),
+  }
+}
+
+#[tauri::command]
+fn native_to_printable(native_value: &str) -> Result<String, String> {
+  match Decimal::from_str(native_value) {
+    Ok(decimal) => Ok(format!(
+      "{}",
+      decimal.to_string().parse::<f64>().unwrap() / 1_000_000.
+    )),
+    Err(e) => Err(format_err!(format!(
+      "Could not convert `{}` to Decimal",
+      native_value
+    ))),
+  }
+}
+
 #[tauri::command]
 async fn connect_with_mnemonic(
   mnemonic: String,
@@ -54,10 +124,7 @@ async fn connect_with_mnemonic(
       Err(e) => format_err!(e),
     },
   );
-  ret.insert(
-    "client_address",
-    client.address().to_string()
-  );
+  ret.insert("client_address", client.address().to_string());
   ret.insert(
     "denom",
     match client.denom() {
@@ -82,6 +149,7 @@ async fn get_balance(
         let mut balance = HashMap::new();
         balance.insert("amount", coin.amount.to_string());
         balance.insert("denom", coin.denom.to_string());
+        balance.insert("printableBalance", printable_coin(Some(coin))?);
         Ok(balance)
       }
       Ok(None) => Err(format!(
@@ -109,7 +177,12 @@ fn _connect_with_mnemonic(mnemonic: Mnemonic, config: &Config) -> NymdClient<Sig
 fn main() {
   tauri::Builder::default()
     .manage(Arc::new(RwLock::new(State::default())))
-    .invoke_handler(tauri::generate_handler![connect_with_mnemonic, get_balance])
+    .invoke_handler(tauri::generate_handler![
+      connect_with_mnemonic,
+      get_balance,
+      printable_balance_to_native,
+      native_to_printable
+    ])
     .run(tauri::generate_context!())
     .expect("error while running tauri application");
 }

tauri-wallet/src/routes/internal-docs/ApiList.tsx

@@ -1,4 +1,4 @@
-import React, { useState } from 'react'
+import React, { useState } from "react";
 import {
   Button,
   Checkbox,
@@ -9,20 +9,44 @@ import {
   ListItem,
   TextField,
   Theme,
-} from '@material-ui/core'
-import { useTheme } from '@material-ui/styles'
-import { DocEntry } from './DocEntry'
+} from "@material-ui/core";
+import { useTheme } from "@material-ui/styles";
+import { DocEntry } from "./DocEntry";
 
 export const ApiList = () => {
-  const [advancedShown, setAdvancedShown] = React.useState(false)
+  const [advancedShown, setAdvancedShown] = React.useState(false);
 
-  const theme: Theme = useTheme()
+  const theme: Theme = useTheme();
 
   return (
     <List>
-      <ListItem><DocEntry function={{ name: 'connect_with_mnemonic', args: [{ name: 'mnemonic', type: 'str' }] }} /></ListItem>
-      <ListItem><DocEntry function={{ name: 'get_balance', args: [] }} /></ListItem>
+      <ListItem>
+        <DocEntry
+          function={{
+            name: "connect_with_mnemonic",
+            args: [{ name: "mnemonic", type: "str" }],
+          }}
+        />
+      </ListItem>
+      <ListItem>
+        <DocEntry function={{ name: "get_balance", args: [] }} />
+      </ListItem>
+      <ListItem>
+        <DocEntry
+          function={{
+            name: "printable_balance_to_native",
+            args: [{ name: "amount", type: "str" }],
+          }}
+        />
+      </ListItem>
+      <ListItem>
+        <DocEntry
+          function={{
+            name: "native_to_printable",
+            args: [{ name: "nativeValue", type: "str" }],
+          }}
+        />
+      </ListItem>
     </List>
-
-  )
-}
+  );
+};