feat: add static chains config (#1103)

* feat: add  static chains config

* fix: code review fixes

apps/namadillo/src/atoms/accounts/atoms.ts

@@ -7,6 +7,7 @@ import { namadaExtensionConnectedAtom } from "atoms/settings";
 import { queryDependentFn } from "atoms/utils";
 import BigNumber from "bignumber.js";
 import { atomWithMutation, atomWithQuery } from "jotai-tanstack-query";
+import { chainConfigByName } from "registry";
 import {
   fetchAccountBalance,
   fetchAccounts,
@@ -50,6 +51,7 @@ export const accountBalanceAtom = atomWithQuery<BigNumber>((get) => {
   const tokenAddress = get(nativeTokenAddressAtom);
   const enablePolling = get(shouldUpdateBalanceAtom);
   const api = get(indexerApiAtom);
+  const chainConfig = chainConfigByName("namada");
 
   return {
     // TODO: subscribe to indexer events when it's done
@@ -59,7 +61,10 @@ export const accountBalanceAtom = atomWithQuery<BigNumber>((get) => {
       return await fetchAccountBalance(
         api,
         defaultAccount.data,
-        tokenAddress.data!
+        tokenAddress.data!,
+        // As this is a nam balance specific atom, we can safely assume that the
+        // first currency is the native token
+        chainConfig.currencies[0].coinDecimals
       );
     }, [tokenAddress, defaultAccount]),
   };

apps/namadillo/src/atoms/accounts/services.ts

@@ -17,21 +17,24 @@ export const fetchDefaultAccount = async (): Promise<Account | undefined> => {
 export const fetchAccountBalance = async (
   api: DefaultApi,
   account: Account | undefined,
-  tokenAddress: string
+  tokenAddress: string,
+  decimals: number
 ): Promise<BigNumber> => {
   if (!account) return BigNumber(0);
   const balancesResponse = await api.apiV1AccountAddressGet(account.address);
 
-  const balances = balancesResponse.data
+  const balance = balancesResponse.data
     // TODO: add filter to the api call
     .filter(({ tokenAddress: ta }) => ta === tokenAddress)
     .map(({ tokenAddress, balance }) => {
       return {
         token: tokenAddress,
         amount: balance,
       };
-    });
+    })
+    .at(0);
 
-  if (balances.length === 0) return BigNumber(0);
-  return new BigNumber(balances[0].amount || 0);
+  return balance ?
+      BigNumber(balance.amount).shiftedBy(-decimals)
+    : BigNumber(0);
 };

apps/namadillo/src/registry/cosmoshub.json

@@ -0,0 +1,22 @@
+{
+  "chainName": "Cosmos Hub",
+  "currencies": [
+    {
+      "coinDecimals": 6,
+      "coinDenom": "ATOM",
+      "coinMinimalDenom": "uatom"
+    }
+  ],
+  "feeCurrencies": [
+    {
+      "coinDecimals": 6,
+      "coinDenom": "ATOM",
+      "coinMinimalDenom": "uatom"
+    }
+  ],
+  "stakeCurrency": {
+    "coinDecimals": 6,
+    "coinDenom": "ATOM",
+    "coinMinimalDenom": "uatom"
+  }
+}

apps/namadillo/src/registry/index.ts

@@ -0,0 +1,54 @@
+import cosmoshub from "./cosmoshub.json";
+import namada from "./namada.json";
+
+type MinimalDenom = string;
+type ConfigName = string;
+type ChainName = "cosmoshub" | "namada";
+type ChainMinDenom = "uatom" | "namnam";
+
+type Currency = {
+  coinDecimals: number;
+  coinDenom: string;
+  coinMinimalDenom: string;
+};
+
+export type ChainConfig = {
+  currencies: Currency[];
+  feeCurrencies: Currency[];
+  stakeCurrency: Currency;
+};
+
+const loadedConfigs: ChainConfig[] = [];
+const minimalDenomMap: Map<string, number> = new Map();
+const nameMap: Map<string, number> = new Map();
+
+export function chainConfigByMinDenom(minDenom: ChainMinDenom): ChainConfig {
+  const index = minimalDenomMap.get(minDenom);
+  if (!index) {
+    throw new Error("Chain config not found");
+  }
+
+  return loadedConfigs[index];
+}
+
+export function chainConfigByName(name: ChainName): ChainConfig {
+  const index = nameMap.get(name);
+  if (!index) {
+    throw new Error("Chain config not found");
+  }
+  return loadedConfigs[index];
+}
+
+function loadConfigs(configs: [MinimalDenom, ConfigName, ChainConfig][]): void {
+  configs.forEach(([minimalDenom, name, config], index) => {
+    loadedConfigs.push(config);
+
+    minimalDenomMap.set(minimalDenom, index);
+    nameMap.set(name, index);
+  });
+}
+
+loadConfigs([
+  ["namnam", "namada", namada],
+  ["uatom", "cosmoshub", cosmoshub],
+]);

apps/namadillo/src/registry/namada.json

@@ -0,0 +1,22 @@
+{
+  "chainName": "Namada",
+  "currencies": [
+    {
+      "coinDecimals": 6,
+      "coinDenom": "NAM",
+      "coinMinimalDenom": "namnam"
+    }
+  ],
+  "feeCurrencies": [
+    {
+      "coinDecimals": 6,
+      "coinDenom": "NAM",
+      "coinMinimalDenom": "namnam"
+    }
+  ],
+  "stakeCurrency": {
+    "coinDecimals": 6,
+    "coinDenom": "NAM",
+    "coinMinimalDenom": "namnam"
+  }
+}