diff --git a/packages/launchpad/src/gas.ts b/packages/launchpad/src/gas.ts
index 5f7251f3..7f0fabe4 100644
--- a/packages/launchpad/src/gas.ts
+++ b/packages/launchpad/src/gas.ts
@@ -1,13 +1,6 @@
 import { coins } from "./coins";
 import { StdFee } from "./types";
 
-/**
- * These fees are used by the higher level methods of SigningCosmosClient
- */
-export interface FeeTable {
-  readonly send: StdFee;
-}
-
 export class GasPrice {
   public readonly amount: number;
   public readonly denom: string;
@@ -18,25 +11,28 @@ export class GasPrice {
   }
 }
 
-export type GasLimits = {
-  readonly [key in keyof FeeTable]: number;
+export type GasLimits<T extends Record<string, StdFee>> = {
+  readonly [key in keyof T]: number;
 };
 
-function calculateFee(gasLimit: number, denom: string, price: number): StdFee {
-  const amount = Math.ceil(price * gasLimit);
+function calculateFee(gasLimit: number, { denom, amount: gasPriceAmount }: GasPrice): StdFee {
+  const amount = Math.ceil(gasPriceAmount * gasLimit);
   return {
     amount: coins(amount, denom),
     gas: gasLimit.toString(),
   };
 }
 
-export function buildFeeTable({ denom, amount }: GasPrice, gasLimits: GasLimits): FeeTable {
-  return Object.entries(gasLimits).reduce((feeTable, [type, gasLimit]) => {
-    return gasLimit === undefined
-      ? feeTable
-      : {
-          ...feeTable,
-          [type]: calculateFee(gasLimit, denom, amount),
-        };
-  }, {} as FeeTable);
+export function buildFeeTable<T extends Record<string, StdFee>>(
+  gasPrice: GasPrice,
+  defaultGasLimits: GasLimits<T>,
+  gasLimits: Partial<GasLimits<T>>,
+): T {
+  return Object.entries(defaultGasLimits).reduce(
+    (feeTable, [type, defaultGasLimit]) => ({
+      ...feeTable,
+      [type]: calculateFee(gasLimits[type] || defaultGasLimit, gasPrice),
+    }),
+    {} as T,
+  );
 }
diff --git a/packages/launchpad/src/index.ts b/packages/launchpad/src/index.ts
index 8d870a18..c1b63346 100644
--- a/packages/launchpad/src/index.ts
+++ b/packages/launchpad/src/index.ts
@@ -29,7 +29,7 @@ export {
   isSearchByTagsQuery,
 } from "./cosmosclient";
 export { makeSignBytes } from "./encoding";
-export { buildFeeTable, FeeTable, GasPrice } from "./gas";
+export { buildFeeTable, GasPrice } from "./gas";
 export {
   AuthAccountsResponse,
   AuthExtension,
@@ -98,7 +98,7 @@ export {
 } from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
-export { SigningCosmosClient } from "./signingcosmosclient";
+export { FeeTable, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, pubkeyType, CosmosSdkTx, PubKey, StdFee, StdSignature, StdTx } from "./types";
 export {
   AccountData,
diff --git a/packages/launchpad/src/signingcosmosclient.ts b/packages/launchpad/src/signingcosmosclient.ts
index 1889fb15..cfd75437 100644
--- a/packages/launchpad/src/signingcosmosclient.ts
+++ b/packages/launchpad/src/signingcosmosclient.ts
@@ -2,14 +2,21 @@
 import { Coin } from "./coins";
 import { Account, BroadcastTxResult, CosmosClient, GetSequenceResult } from "./cosmosclient";
 import { makeSignBytes } from "./encoding";
-import { buildFeeTable, FeeTable, GasLimits, GasPrice } from "./gas";
+import { buildFeeTable, GasLimits, GasPrice } from "./gas";
 import { BroadcastMode } from "./lcdapi";
 import { Msg, MsgSend } from "./msgs";
 import { StdFee, StdTx } from "./types";
 import { OfflineSigner } from "./wallet";
 
+/**
+ * These fees are used by the higher level methods of SigningCosmosClient
+ */
+export interface FeeTable extends Record<string, StdFee> {
+  readonly send: StdFee;
+}
+
 const defaultGasPrice = new GasPrice(0.025, "ucosm");
-const defaultGasLimits: GasLimits = { send: 80000 };
+const defaultGasLimits: GasLimits<FeeTable> = { send: 80000 };
 
 /** Use for testing only */
 export interface PrivateSigningCosmosClient {
@@ -40,20 +47,14 @@ export class SigningCosmosClient extends CosmosClient {
     senderAddress: string,
     signer: OfflineSigner,
     gasPrice: GasPrice = defaultGasPrice,
-    gasLimits?: Partial<GasLimits>,
+    gasLimits: Partial<GasLimits<FeeTable>> = {},
     broadcastMode = BroadcastMode.Block,
   ) {
     super(apiUrl, broadcastMode);
     this.anyValidAddress = senderAddress;
-
     this.senderAddress = senderAddress;
     this.signer = signer;
-
-    const mergedGasLimits = {
-      ...defaultGasLimits,
-      ...gasLimits,
-    };
-    this.fees = buildFeeTable(gasPrice, mergedGasLimits);
+    this.fees = buildFeeTable<FeeTable>(gasPrice, defaultGasLimits, gasLimits);
   }
 
   public async getSequence(address?: string): Promise<GetSequenceResult> {
diff --git a/packages/launchpad/types/gas.d.ts b/packages/launchpad/types/gas.d.ts
index 4aeee124..b4070f3e 100644
--- a/packages/launchpad/types/gas.d.ts
+++ b/packages/launchpad/types/gas.d.ts
@@ -1,16 +1,14 @@
 import { StdFee } from "./types";
-/**
- * These fees are used by the higher level methods of SigningCosmosClient
- */
-export interface FeeTable {
-  readonly send: StdFee;
-}
 export declare class GasPrice {
   readonly amount: number;
   readonly denom: string;
   constructor(amount: number, denom: string);
 }
-export declare type GasLimits = {
-  readonly [key in keyof FeeTable]: number;
+export declare type GasLimits<T extends Record<string, StdFee>> = {
+  readonly [key in keyof T]: number;
 };
-export declare function buildFeeTable({ denom, amount }: GasPrice, gasLimits: GasLimits): FeeTable;
+export declare function buildFeeTable<T extends Record<string, StdFee>>(
+  gasPrice: GasPrice,
+  defaultGasLimits: GasLimits<T>,
+  gasLimits: Partial<GasLimits<T>>,
+): T;
diff --git a/packages/launchpad/types/index.d.ts b/packages/launchpad/types/index.d.ts
index 4e93998a..3f08cbbc 100644
--- a/packages/launchpad/types/index.d.ts
+++ b/packages/launchpad/types/index.d.ts
@@ -27,7 +27,7 @@ export {
   isSearchByTagsQuery,
 } from "./cosmosclient";
 export { makeSignBytes } from "./encoding";
-export { buildFeeTable, FeeTable, GasPrice } from "./gas";
+export { buildFeeTable, GasPrice } from "./gas";
 export {
   AuthAccountsResponse,
   AuthExtension,
@@ -96,7 +96,7 @@ export {
 } from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
-export { SigningCosmosClient } from "./signingcosmosclient";
+export { FeeTable, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, pubkeyType, CosmosSdkTx, PubKey, StdFee, StdSignature, StdTx } from "./types";
 export {
   AccountData,
diff --git a/packages/launchpad/types/signingcosmosclient.d.ts b/packages/launchpad/types/signingcosmosclient.d.ts
index ebfffc92..c6a82eea 100644
--- a/packages/launchpad/types/signingcosmosclient.d.ts
+++ b/packages/launchpad/types/signingcosmosclient.d.ts
@@ -1,10 +1,16 @@
 import { Coin } from "./coins";
 import { Account, BroadcastTxResult, CosmosClient, GetSequenceResult } from "./cosmosclient";
-import { FeeTable, GasLimits, GasPrice } from "./gas";
+import { GasLimits, GasPrice } from "./gas";
 import { BroadcastMode } from "./lcdapi";
 import { Msg } from "./msgs";
 import { StdFee } from "./types";
 import { OfflineSigner } from "./wallet";
+/**
+ * These fees are used by the higher level methods of SigningCosmosClient
+ */
+export interface FeeTable extends Record<string, StdFee> {
+  readonly send: StdFee;
+}
 /** Use for testing only */
 export interface PrivateSigningCosmosClient {
   readonly fees: FeeTable;
@@ -31,7 +37,7 @@ export declare class SigningCosmosClient extends CosmosClient {
     senderAddress: string,
     signer: OfflineSigner,
     gasPrice?: GasPrice,
-    gasLimits?: Partial<GasLimits>,
+    gasLimits?: Partial<GasLimits<FeeTable>>,
     broadcastMode?: BroadcastMode,
   );
   getSequence(address?: string): Promise<GetSequenceResult>;