diff --git a/packages/sdk38/src/cosmosclient.searchtx.spec.ts b/packages/sdk38/src/cosmosclient.searchtx.spec.ts
index efaeb440..1f44bc88 100644
--- a/packages/sdk38/src/cosmosclient.searchtx.spec.ts
+++ b/packages/sdk38/src/cosmosclient.searchtx.spec.ts
@@ -36,9 +36,7 @@ describe("CosmosClient.searchTx", () => {
       await wallet.enable();
       const accounts = await wallet.getAccounts();
       const { address: walletAddress } = accounts[0];
-      const client = new SigningCosmosClient(wasmd.endpoint, faucet.address, async (signBytes) =>
-        wallet.sign(walletAddress, signBytes),
-      );
+      const client = new SigningCosmosClient(wasmd.endpoint, faucet.address, wallet);
 
       {
         const memo = "Sending more than I can afford";
diff --git a/packages/sdk38/src/index.ts b/packages/sdk38/src/index.ts
index 5af7b788..5caf70db 100644
--- a/packages/sdk38/src/index.ts
+++ b/packages/sdk38/src/index.ts
@@ -53,6 +53,6 @@ export { isMsgDelegate, isMsgSend, Msg, MsgDelegate, MsgSend } from "./msgs";
 export { decodeBech32Pubkey, encodeBech32Pubkey, encodeSecp256k1Pubkey } from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
-export { FeeTable, SigningCallback, SigningCosmosClient } from "./signingcosmosclient";
+export { FeeTable, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, pubkeyType, CosmosSdkTx, PubKey, StdFee, StdSignature, StdTx } from "./types";
-export { OfflineWallet, Secp256k1OfflineWallet, makeCosmoshubPath } from "./wallet";
+export { OfflineSigner, Secp256k1OfflineWallet, makeCosmoshubPath } from "./wallet";
diff --git a/packages/sdk38/src/lcdapi/lcdclient.spec.ts b/packages/sdk38/src/lcdapi/lcdclient.spec.ts
index 2b712fba..ca314d42 100644
--- a/packages/sdk38/src/lcdapi/lcdclient.spec.ts
+++ b/packages/sdk38/src/lcdapi/lcdclient.spec.ts
@@ -220,9 +220,7 @@ describe("LcdClient", () => {
         await wallet.enable();
         const accounts = await wallet.getAccounts();
         const { address: walletAddress } = accounts[0];
-        const client = new SigningCosmosClient(wasmd.endpoint, faucet.address, async (signBytes) =>
-          wallet.sign(walletAddress, signBytes),
-        );
+        const client = new SigningCosmosClient(wasmd.endpoint, faucet.address, wallet);
 
         {
           const recipient = makeRandomAddress();
@@ -354,12 +352,7 @@ describe("LcdClient", () => {
     beforeAll(async () => {
       if (wasmdEnabled()) {
         const wallet = await Secp256k1OfflineWallet.fromMnemonic(faucet.mnemonic);
-        await wallet.enable();
-        const accounts = await wallet.getAccounts();
-        const { address: walletAddress } = accounts[0];
-        const client = new SigningCosmosClient(wasmd.endpoint, faucet.address, async (signBytes) =>
-          wallet.sign(walletAddress, signBytes),
-        );
+        const client = new SigningCosmosClient(wasmd.endpoint, faucet.address, wallet);
 
         const recipient = makeRandomAddress();
         const transferAmount = [
diff --git a/packages/sdk38/src/signingcosmosclient.spec.ts b/packages/sdk38/src/signingcosmosclient.spec.ts
index 81f69689..93a833e0 100644
--- a/packages/sdk38/src/signingcosmosclient.spec.ts
+++ b/packages/sdk38/src/signingcosmosclient.spec.ts
@@ -22,12 +22,7 @@ describe("SigningCosmosClient", () => {
   describe("makeReadOnly", () => {
     it("can be constructed", async () => {
       const wallet = await Secp256k1OfflineWallet.fromMnemonic(faucet.mnemonic);
-      await wallet.enable();
-      const accounts = await wallet.getAccounts();
-      const { address } = accounts[0];
-      const client = new SigningCosmosClient(httpUrl, faucet.address, async (signBytes) =>
-        wallet.sign(address, signBytes),
-      );
+      const client = new SigningCosmosClient(httpUrl, faucet.address, wallet);
       expect(client).toBeTruthy();
     });
   });
@@ -36,12 +31,7 @@ describe("SigningCosmosClient", () => {
     it("always uses authAccount implementation", async () => {
       pendingWithoutWasmd();
       const wallet = await Secp256k1OfflineWallet.fromMnemonic(faucet.mnemonic);
-      await wallet.enable();
-      const accounts = await wallet.getAccounts();
-      const { address } = accounts[0];
-      const client = new SigningCosmosClient(httpUrl, faucet.address, async (signBytes) =>
-        wallet.sign(address, signBytes),
-      );
+      const client = new SigningCosmosClient(httpUrl, faucet.address, wallet);
 
       const openedClient = (client as unknown) as PrivateCosmWasmClient;
       const blockLatestSpy = spyOn(openedClient.lcdClient, "blocksLatest").and.callThrough();
@@ -59,12 +49,7 @@ describe("SigningCosmosClient", () => {
     it("works", async () => {
       pendingWithoutWasmd();
       const wallet = await Secp256k1OfflineWallet.fromMnemonic(faucet.mnemonic);
-      await wallet.enable();
-      const accounts = await wallet.getAccounts();
-      const { address } = accounts[0];
-      const client = new SigningCosmosClient(httpUrl, faucet.address, async (signBytes) =>
-        wallet.sign(address, signBytes),
-      );
+      const client = new SigningCosmosClient(httpUrl, faucet.address, wallet);
 
       // instantiate
       const transferAmount: readonly Coin[] = [
diff --git a/packages/sdk38/src/signingcosmosclient.ts b/packages/sdk38/src/signingcosmosclient.ts
index 74f23fef..9456a67a 100644
--- a/packages/sdk38/src/signingcosmosclient.ts
+++ b/packages/sdk38/src/signingcosmosclient.ts
@@ -3,11 +3,8 @@ import { Account, CosmosClient, GetNonceResult, PostTxResult } from "./cosmoscli
 import { makeSignBytes } from "./encoding";
 import { BroadcastMode } from "./lcdapi";
 import { MsgSend } from "./msgs";
-import { StdFee, StdSignature, StdTx } from "./types";
-
-export interface SigningCallback {
-  (signBytes: Uint8Array): Promise<StdSignature>;
-}
+import { StdFee, StdTx } from "./types";
+import { OfflineSigner } from "./wallet";
 
 export interface FeeTable {
   readonly upload: StdFee;
@@ -38,7 +35,7 @@ const defaultFees: FeeTable = {
 export class SigningCosmosClient extends CosmosClient {
   public readonly senderAddress: string;
 
-  private readonly signCallback: SigningCallback;
+  private readonly signer: OfflineSigner;
   private readonly fees: FeeTable;
 
   /**
@@ -49,14 +46,14 @@ export class SigningCosmosClient extends CosmosClient {
    *
    * @param apiUrl The URL of a Cosmos SDK light client daemon API (sometimes called REST server or REST API)
    * @param senderAddress The address that will sign and send transactions using this instance
-   * @param signCallback An asynchonous callback to create a signature for a given transaction. This can be implemented using secure key stores that require user interaction.
+   * @param signer A wallet provider which can provide signatures for transactions, potentially requiring user input.
    * @param customFees The fees that are paid for transactions
    * @param broadcastMode Defines at which point of the transaction processing the postTx method (i.e. transaction broadcasting) returns
    */
   public constructor(
     apiUrl: string,
     senderAddress: string,
-    signCallback: SigningCallback,
+    signer: OfflineSigner,
     customFees?: Partial<FeeTable>,
     broadcastMode = BroadcastMode.Block,
   ) {
@@ -64,7 +61,7 @@ export class SigningCosmosClient extends CosmosClient {
     this.anyValidAddress = senderAddress;
 
     this.senderAddress = senderAddress;
-    this.signCallback = signCallback;
+    this.signer = signer;
     this.fees = { ...defaultFees, ...(customFees || {}) };
   }
 
@@ -81,6 +78,7 @@ export class SigningCosmosClient extends CosmosClient {
     transferAmount: readonly Coin[],
     memo = "",
   ): Promise<PostTxResult> {
+    await this.signer.enable();
     const sendMsg: MsgSend = {
       type: "cosmos-sdk/MsgSend",
       value: {
@@ -95,7 +93,7 @@ export class SigningCosmosClient extends CosmosClient {
     const { accountNumber, sequence } = await this.getNonce();
     const chainId = await this.getChainId();
     const signBytes = makeSignBytes([sendMsg], fee, chainId, memo, accountNumber, sequence);
-    const signature = await this.signCallback(signBytes);
+    const signature = await this.signer.sign(this.senderAddress, signBytes);
     const signedTx: StdTx = {
       msg: [sendMsg],
       fee: fee,
diff --git a/packages/sdk38/src/wallet.ts b/packages/sdk38/src/wallet.ts
index 3441f9f9..40f89d76 100644
--- a/packages/sdk38/src/wallet.ts
+++ b/packages/sdk38/src/wallet.ts
@@ -24,7 +24,7 @@ export interface AccountData {
   readonly pubkey: Uint8Array;
 }
 
-export interface OfflineWallet {
+export interface OfflineSigner {
   /**
    * Request access to the user's accounts. Wallet should ask the user to approve or deny access. Returns true if granted access or false if denied.
    */
@@ -68,7 +68,7 @@ export function makeCosmoshubPath(a: number): readonly Slip10RawIndex[] {
   ];
 }
 
-export class Secp256k1OfflineWallet implements OfflineWallet {
+export class Secp256k1OfflineWallet implements OfflineSigner {
   public static async fromMnemonic(
     mnemonic: string,
     hdPath: readonly Slip10RawIndex[] = makeCosmoshubPath(0),
diff --git a/packages/sdk38/types/index.d.ts b/packages/sdk38/types/index.d.ts
index 76c332f0..0deb1c37 100644
--- a/packages/sdk38/types/index.d.ts
+++ b/packages/sdk38/types/index.d.ts
@@ -51,6 +51,6 @@ export { isMsgDelegate, isMsgSend, Msg, MsgDelegate, MsgSend } from "./msgs";
 export { decodeBech32Pubkey, encodeBech32Pubkey, encodeSecp256k1Pubkey } from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
-export { FeeTable, SigningCallback, SigningCosmosClient } from "./signingcosmosclient";
+export { FeeTable, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, pubkeyType, CosmosSdkTx, PubKey, StdFee, StdSignature, StdTx } from "./types";
-export { OfflineWallet, Secp256k1OfflineWallet, makeCosmoshubPath } from "./wallet";
+export { OfflineSigner, Secp256k1OfflineWallet, makeCosmoshubPath } from "./wallet";
diff --git a/packages/sdk38/types/signingcosmosclient.d.ts b/packages/sdk38/types/signingcosmosclient.d.ts
index a733b8f6..dfcb9a70 100644
--- a/packages/sdk38/types/signingcosmosclient.d.ts
+++ b/packages/sdk38/types/signingcosmosclient.d.ts
@@ -1,10 +1,8 @@
 import { Coin } from "./coins";
 import { Account, CosmosClient, GetNonceResult, PostTxResult } from "./cosmosclient";
 import { BroadcastMode } from "./lcdapi";
-import { StdFee, StdSignature } from "./types";
-export interface SigningCallback {
-  (signBytes: Uint8Array): Promise<StdSignature>;
-}
+import { StdFee } from "./types";
+import { OfflineSigner } from "./wallet";
 export interface FeeTable {
   readonly upload: StdFee;
   readonly init: StdFee;
@@ -13,7 +11,7 @@ export interface FeeTable {
 }
 export declare class SigningCosmosClient extends CosmosClient {
   readonly senderAddress: string;
-  private readonly signCallback;
+  private readonly signer;
   private readonly fees;
   /**
    * Creates a new client with signing capability to interact with a CosmWasm blockchain. This is the bigger brother of CosmWasmClient.
@@ -23,14 +21,14 @@ export declare class SigningCosmosClient extends CosmosClient {
    *
    * @param apiUrl The URL of a Cosmos SDK light client daemon API (sometimes called REST server or REST API)
    * @param senderAddress The address that will sign and send transactions using this instance
-   * @param signCallback An asynchonous callback to create a signature for a given transaction. This can be implemented using secure key stores that require user interaction.
+   * @param signer A wallet provider which can provide signatures for transactions, potentially requiring user input.
    * @param customFees The fees that are paid for transactions
    * @param broadcastMode Defines at which point of the transaction processing the postTx method (i.e. transaction broadcasting) returns
    */
   constructor(
     apiUrl: string,
     senderAddress: string,
-    signCallback: SigningCallback,
+    signer: OfflineSigner,
     customFees?: Partial<FeeTable>,
     broadcastMode?: BroadcastMode,
   );
diff --git a/packages/sdk38/types/wallet.d.ts b/packages/sdk38/types/wallet.d.ts
index f27bea6f..57569fb4 100644
--- a/packages/sdk38/types/wallet.d.ts
+++ b/packages/sdk38/types/wallet.d.ts
@@ -7,7 +7,7 @@ export interface AccountData {
   readonly algo: Algo;
   readonly pubkey: Uint8Array;
 }
-export interface OfflineWallet {
+export interface OfflineSigner {
   /**
    * Request access to the user's accounts. Wallet should ask the user to approve or deny access. Returns true if granted access or false if denied.
    */
@@ -26,7 +26,7 @@ export interface OfflineWallet {
  * with 0-based account index `a`.
  */
 export declare function makeCosmoshubPath(a: number): readonly Slip10RawIndex[];
-export declare class Secp256k1OfflineWallet implements OfflineWallet {
+export declare class Secp256k1OfflineWallet implements OfflineSigner {
   static fromMnemonic(
     mnemonic: string,
     hdPath?: readonly Slip10RawIndex[],