Add method to parse gas and fees

src/index.ts

@@ -588,3 +588,4 @@ export { LaconicClient };
 export * from './constants';
 export * from './types/cerc/bond/message';
 export * from './types/cerc/onboarding/message';
+export * from './util';

src/util.ts

@@ -1,6 +1,8 @@
 import * as Block from 'multiformats/block';
 import { sha256 as hasher } from 'multiformats/hashes/sha2';
+import assert from 'assert';
 
+import { StdFee, parseCoins } from '@cosmjs/stargate';
 import * as dagCBOR from '@ipld/dag-cbor';
 import * as dagJSON from '@ipld/dag-json';
 
@@ -118,4 +120,27 @@ export class Util {
 
     return block.cid.toString();
   }
+
+  /**
+   * Get gas in proper format
+   */
+  static parseGasAndFees (gas?: string, fees?: string): StdFee | undefined | number {
+    // If fees is not given or a number, treat it as a gas estimation multiplier
+    if (fees === null || fees === undefined) {
+      return undefined;
+    }
+
+    const isFeesANumber = !isNaN(Number(fees));
+    if (isFeesANumber) {
+      return Number(fees);
+    }
+
+    // If fees is not a gas estimation multiplier, gas is required
+    assert(gas, 'Invalid gas.');
+
+    return {
+      amount: parseCoins(String(fees)),
+      gas: String(gas)
+    };
+  }
 }