diff --git a/CHANGELOG.md b/CHANGELOG.md
index 112dbb0e..65c13f16 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -48,7 +48,8 @@
 - @cosmjs/launchpad: Export `StdSignDoc` and create helpers to make and
   serialize a `StdSignDoc`: `makeStdSignDoc` and `serializeSignDoc`.
 - @cosmjs/launchpad: Let `OfflineSigner.sign` take an `StdSignDoc` instead of an
-  encoded message.
+  encoded message and return a `SignResponse` that includes the document which
+  was signed.
 - @cosmjs/launchpad: Remove `PrehashType` and the prehash type argument in
   `OfflineSigner.sign` because the signer now needs to know how to serialize an
   `StdSignDoc`.
diff --git a/packages/cosmwasm/src/cosmwasmclient.searchtx.spec.ts b/packages/cosmwasm/src/cosmwasmclient.searchtx.spec.ts
index bf6ae681..66a7eb2c 100644
--- a/packages/cosmwasm/src/cosmwasmclient.searchtx.spec.ts
+++ b/packages/cosmwasm/src/cosmwasmclient.searchtx.spec.ts
@@ -104,7 +104,7 @@ describe("CosmWasmClient.searchTx", () => {
         const { accountNumber, sequence } = await client.getSequence();
         const chainId = await client.getChainId();
         const signDoc = makeStdSignDoc([sendMsg], fee, chainId, memo, accountNumber, sequence);
-        const signature = await wallet.sign(alice.address0, signDoc);
+        const { signature } = await wallet.sign(alice.address0, signDoc);
         const tx: CosmosSdkTx = {
           type: "cosmos-sdk/StdTx",
           value: {
diff --git a/packages/cosmwasm/src/cosmwasmclient.spec.ts b/packages/cosmwasm/src/cosmwasmclient.spec.ts
index fcdf8e6d..5a464b19 100644
--- a/packages/cosmwasm/src/cosmwasmclient.spec.ts
+++ b/packages/cosmwasm/src/cosmwasmclient.spec.ts
@@ -7,6 +7,7 @@ import {
   MsgSend,
   Secp256k1Wallet,
   StdFee,
+  StdTx,
 } from "@cosmjs/launchpad";
 import { assert, sleep } from "@cosmjs/utils";
 import { ReadonlyDate } from "readonly-date";
@@ -237,8 +238,8 @@ describe("CosmWasmClient", () => {
       const chainId = await client.getChainId();
       const { accountNumber, sequence } = await client.getSequence(alice.address0);
       const signDoc = makeStdSignDoc([sendMsg], fee, chainId, memo, accountNumber, sequence);
-      const signature = await wallet.sign(alice.address0, signDoc);
-      const signedTx = {
+      const { signature } = await wallet.sign(alice.address0, signDoc);
+      const signedTx: StdTx = {
         msg: [sendMsg],
         fee: fee,
         memo: memo,
diff --git a/packages/cosmwasm/src/lcdapi/wasm.spec.ts b/packages/cosmwasm/src/lcdapi/wasm.spec.ts
index 83790e1a..69f712cf 100644
--- a/packages/cosmwasm/src/lcdapi/wasm.spec.ts
+++ b/packages/cosmwasm/src/lcdapi/wasm.spec.ts
@@ -126,7 +126,7 @@ async function executeContract(
 
   const { account_number, sequence } = (await client.auth.account(alice.address0)).result.value;
   const signDoc = makeStdSignDoc([theMsg], fee, wasmd.chainId, memo, account_number, sequence);
-  const signature = await signer.sign(alice.address0, signDoc);
+  const { signature } = await signer.sign(alice.address0, signDoc);
   const signedTx = makeSignedTx(theMsg, fee, memo, signature);
   return client.broadcastTx(signedTx);
 }
diff --git a/packages/cosmwasm/src/signingcosmwasmclient.ts b/packages/cosmwasm/src/signingcosmwasmclient.ts
index 0b27a2c3..6b008d2d 100644
--- a/packages/cosmwasm/src/signingcosmwasmclient.ts
+++ b/packages/cosmwasm/src/signingcosmwasmclient.ts
@@ -361,7 +361,7 @@ export class SigningCosmWasmClient extends CosmWasmClient {
     const { accountNumber, sequence } = await this.getSequence();
     const chainId = await this.getChainId();
     const signDoc = makeStdSignDoc(msgs, fee, chainId, memo, accountNumber, sequence);
-    const signature = await this.signer.sign(this.senderAddress, signDoc);
+    const { signature } = await this.signer.sign(this.senderAddress, signDoc);
     const signedTx: StdTx = {
       msg: msgs,
       fee: fee,
diff --git a/packages/launchpad-ledger/src/demo/node.ts b/packages/launchpad-ledger/src/demo/node.ts
index 6cd967e2..c4cff2a6 100644
--- a/packages/launchpad-ledger/src/demo/node.ts
+++ b/packages/launchpad-ledger/src/demo/node.ts
@@ -56,5 +56,6 @@ export async function sign(
     accountNumber,
     defaultSequence,
   );
-  return signer.sign(fromAddress, signDoc);
+  const { signature } = await signer.sign(fromAddress, signDoc);
+  return signature;
 }
diff --git a/packages/launchpad-ledger/src/ledgersigner.ts b/packages/launchpad-ledger/src/ledgersigner.ts
index c09fc03b..0e00d132 100644
--- a/packages/launchpad-ledger/src/ledgersigner.ts
+++ b/packages/launchpad-ledger/src/ledgersigner.ts
@@ -4,10 +4,9 @@ import {
   encodeSecp256k1Signature,
   makeCosmoshubPath,
   OfflineSigner,
-  StdSignature,
   StdSignDoc,
 } from "@cosmjs/launchpad";
-import { serializeSignDoc } from "@cosmjs/launchpad";
+import { serializeSignDoc, SignResponse } from "@cosmjs/launchpad";
 
 import { LaunchpadLedger, LaunchpadLedgerOptions } from "./launchpadledger";
 
@@ -36,7 +35,7 @@ export class LedgerSigner implements OfflineSigner {
     return this.accounts;
   }
 
-  public async sign(signerAddress: string, signDoc: StdSignDoc): Promise<StdSignature> {
+  public async sign(signerAddress: string, signDoc: StdSignDoc): Promise<SignResponse> {
     const accounts = this.accounts || (await this.getAccounts());
     const accountIndex = accounts.findIndex((account) => account.address === signerAddress);
 
@@ -48,6 +47,9 @@ export class LedgerSigner implements OfflineSigner {
     const accountForAddress = accounts[accountIndex];
     const hdPath = this.hdPaths[accountIndex];
     const signature = await this.ledger.sign(message, hdPath);
-    return encodeSecp256k1Signature(accountForAddress.pubkey, signature);
+    return {
+      signedDoc: signDoc,
+      signature: encodeSecp256k1Signature(accountForAddress.pubkey, signature),
+    };
   }
 }
diff --git a/packages/launchpad-ledger/types/ledgersigner.d.ts b/packages/launchpad-ledger/types/ledgersigner.d.ts
index ffc9a609..6ddfee8b 100644
--- a/packages/launchpad-ledger/types/ledgersigner.d.ts
+++ b/packages/launchpad-ledger/types/ledgersigner.d.ts
@@ -1,4 +1,5 @@
-import { AccountData, OfflineSigner, StdSignature, StdSignDoc } from "@cosmjs/launchpad";
+import { AccountData, OfflineSigner, StdSignDoc } from "@cosmjs/launchpad";
+import { SignResponse } from "@cosmjs/launchpad";
 import { LaunchpadLedgerOptions } from "./launchpadledger";
 export declare class LedgerSigner implements OfflineSigner {
   private readonly ledger;
@@ -6,5 +7,5 @@ export declare class LedgerSigner implements OfflineSigner {
   private accounts?;
   constructor(options?: LaunchpadLedgerOptions);
   getAccounts(): Promise<readonly AccountData[]>;
-  sign(signerAddress: string, signDoc: StdSignDoc): Promise<StdSignature>;
+  sign(signerAddress: string, signDoc: StdSignDoc): Promise<SignResponse>;
 }
diff --git a/packages/launchpad/src/cosmosclient.searchtx.spec.ts b/packages/launchpad/src/cosmosclient.searchtx.spec.ts
index 8d247634..0a99909a 100644
--- a/packages/launchpad/src/cosmosclient.searchtx.spec.ts
+++ b/packages/launchpad/src/cosmosclient.searchtx.spec.ts
@@ -56,7 +56,7 @@ describe("CosmosClient.searchTx", () => {
         const { accountNumber, sequence } = await client.getSequence();
         const chainId = await client.getChainId();
         const signDoc = makeStdSignDoc([sendMsg], fee, chainId, memo, accountNumber, sequence);
-        const signature = await wallet.sign(walletAddress, signDoc);
+        const { signature } = await wallet.sign(walletAddress, signDoc);
         const tx: CosmosSdkTx = {
           type: "cosmos-sdk/StdTx",
           value: {
diff --git a/packages/launchpad/src/cosmosclient.spec.ts b/packages/launchpad/src/cosmosclient.spec.ts
index 47368a87..bf6571b6 100644
--- a/packages/launchpad/src/cosmosclient.spec.ts
+++ b/packages/launchpad/src/cosmosclient.spec.ts
@@ -16,7 +16,7 @@ import {
   unused,
   wasmd,
 } from "./testutils.spec";
-import { StdFee } from "./types";
+import { StdFee, StdTx } from "./types";
 
 const blockTime = 1_000; // ms
 
@@ -230,8 +230,8 @@ describe("CosmosClient", () => {
       const chainId = await client.getChainId();
       const { accountNumber, sequence } = await client.getSequence(faucet.address);
       const signDoc = makeStdSignDoc([sendMsg], fee, chainId, memo, accountNumber, sequence);
-      const signature = await wallet.sign(walletAddress, signDoc);
-      const signedTx = {
+      const { signature } = await wallet.sign(walletAddress, signDoc);
+      const signedTx: StdTx = {
         msg: [sendMsg],
         fee: fee,
         memo: memo,
diff --git a/packages/launchpad/src/index.ts b/packages/launchpad/src/index.ts
index 9fd6d7d0..7220683d 100644
--- a/packages/launchpad/src/index.ts
+++ b/packages/launchpad/src/index.ts
@@ -98,7 +98,7 @@ export {
 } from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
-export { AccountData, Algo, OfflineSigner } from "./signer";
+export { AccountData, Algo, OfflineSigner, SignResponse } from "./signer";
 export { CosmosFeeTable, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, pubkeyType, CosmosSdkTx, PubKey, StdFee, StdSignature, StdTx } from "./types";
 export { makeCosmoshubPath, executeKdf, KdfConfiguration } from "./wallet";
diff --git a/packages/launchpad/src/lcdapi/distribution.spec.ts b/packages/launchpad/src/lcdapi/distribution.spec.ts
index bc68176e..6e5f3647 100644
--- a/packages/launchpad/src/lcdapi/distribution.spec.ts
+++ b/packages/launchpad/src/lcdapi/distribution.spec.ts
@@ -46,7 +46,7 @@ describe("DistributionExtension", () => {
       const memo = "Test delegation for wasmd";
       const { accountNumber, sequence } = await client.getSequence();
       const signDoc = makeStdSignDoc([msg], defaultFee, chainId, memo, accountNumber, sequence);
-      const signature = await wallet.sign(faucet.address, signDoc);
+      const { signature } = await wallet.sign(faucet.address, signDoc);
       const tx = {
         msg: [msg],
         fee: defaultFee,
diff --git a/packages/launchpad/src/lcdapi/gov.spec.ts b/packages/launchpad/src/lcdapi/gov.spec.ts
index 0af73b64..231253b7 100644
--- a/packages/launchpad/src/lcdapi/gov.spec.ts
+++ b/packages/launchpad/src/lcdapi/gov.spec.ts
@@ -58,7 +58,7 @@ describe("GovExtension", () => {
         proposalAccountNumber,
         proposalSequence,
       );
-      const proposalSignature = await wallet.sign(faucet.address, proposalSignDoc);
+      const { signature: proposalSignature } = await wallet.sign(faucet.address, proposalSignDoc);
       const proposalTx = {
         msg: [proposalMsg],
         fee: defaultFee,
@@ -90,7 +90,7 @@ describe("GovExtension", () => {
         voteAccountNumber,
         voteSequence,
       );
-      const voteSignature = await wallet.sign(faucet.address, voteSignDoc);
+      const { signature: voteSignature } = await wallet.sign(faucet.address, voteSignDoc);
       const voteTx = {
         msg: [voteMsg],
         fee: defaultFee,
diff --git a/packages/launchpad/src/lcdapi/lcdclient.spec.ts b/packages/launchpad/src/lcdapi/lcdclient.spec.ts
index a1043d4a..f2147e25 100644
--- a/packages/launchpad/src/lcdapi/lcdclient.spec.ts
+++ b/packages/launchpad/src/lcdapi/lcdclient.spec.ts
@@ -20,7 +20,7 @@ import {
   wasmd,
   wasmdEnabled,
 } from "../testutils.spec";
-import { StdFee } from "../types";
+import { StdFee, StdTx } from "../types";
 import { makeCosmoshubPath } from "../wallet";
 import { setupAuthExtension } from "./auth";
 import { TxsResponse } from "./base";
@@ -240,8 +240,8 @@ describe("LcdClient", () => {
           const { accountNumber, sequence } = await client.getSequence();
           const chainId = await client.getChainId();
           const signDoc = makeStdSignDoc([sendMsg], fee, chainId, memo, accountNumber, sequence);
-          const signature = await wallet.sign(walletAddress, signDoc);
-          const signedTx = {
+          const { signature } = await wallet.sign(walletAddress, signDoc);
+          const signedTx: StdTx = {
             msg: [sendMsg],
             fee: fee,
             memo: memo,
@@ -538,7 +538,7 @@ describe("LcdClient", () => {
       const { account_number, sequence } = (await client.auth.account(faucet.address)).result.value;
 
       const signDoc = makeStdSignDoc([theMsg], fee, wasmd.chainId, memo, account_number, sequence);
-      const signature = await wallet.sign(walletAddress, signDoc);
+      const { signature } = await wallet.sign(walletAddress, signDoc);
       const signedTx = makeSignedTx(theMsg, fee, memo, signature);
       const result = await client.broadcastTx(signedTx);
       expect(result.code).toBeUndefined();
@@ -597,10 +597,10 @@ describe("LcdClient", () => {
       const signDoc1 = makeStdSignDoc([theMsg], fee, wasmd.chainId, memo, an1, sequence1);
       const signDoc2 = makeStdSignDoc([theMsg], fee, wasmd.chainId, memo, an2, sequence2);
       const signDoc3 = makeStdSignDoc([theMsg], fee, wasmd.chainId, memo, an3, sequence3);
-      const signature1 = await account1.sign(address1, signDoc1);
-      const signature2 = await account2.sign(address2, signDoc2);
-      const signature3 = await account3.sign(address3, signDoc3);
-      const signedTx = {
+      const { signature: signature1 } = await account1.sign(address1, signDoc1);
+      const { signature: signature2 } = await account2.sign(address2, signDoc2);
+      const { signature: signature3 } = await account3.sign(address3, signDoc3);
+      const signedTx: StdTx = {
         msg: [theMsg],
         fee: fee,
         memo: memo,
@@ -659,8 +659,8 @@ describe("LcdClient", () => {
       const { account_number, sequence } = (await client.auth.account(walletAddress)).result.value;
 
       const signDoc = makeStdSignDoc([msg1, msg2], fee, wasmd.chainId, memo, account_number, sequence);
-      const signature = await wallet.sign(walletAddress, signDoc);
-      const signedTx = {
+      const { signature } = await wallet.sign(walletAddress, signDoc);
+      const signedTx: StdTx = {
         msg: [msg1, msg2],
         fee: fee,
         memo: memo,
@@ -724,9 +724,9 @@ describe("LcdClient", () => {
 
       const signDoc1 = makeStdSignDoc([msg2, msg1], fee, wasmd.chainId, memo, an1, sequence1);
       const signDoc2 = makeStdSignDoc([msg2, msg1], fee, wasmd.chainId, memo, an2, sequence2);
-      const signature1 = await account1.sign(address1, signDoc1);
-      const signature2 = await account2.sign(address2, signDoc2);
-      const signedTx = {
+      const { signature: signature1 } = await account1.sign(address1, signDoc1);
+      const { signature: signature2 } = await account2.sign(address2, signDoc2);
+      const signedTx: StdTx = {
         msg: [msg2, msg1],
         fee: fee,
         memo: memo,
@@ -795,9 +795,9 @@ describe("LcdClient", () => {
 
       const signDoc1 = makeStdSignDoc([msg1, msg2], fee, wasmd.chainId, memo, an1, sequence1);
       const signDoc2 = makeStdSignDoc([msg1, msg2], fee, wasmd.chainId, memo, an2, sequence2);
-      const signature1 = await account1.sign(address1, signDoc1);
-      const signature2 = await account2.sign(address2, signDoc2);
-      const signedTx = {
+      const { signature: signature1 } = await account1.sign(address1, signDoc1);
+      const { signature: signature2 } = await account2.sign(address2, signDoc2);
+      const signedTx: StdTx = {
         msg: [msg1, msg2],
         fee: fee,
         memo: memo,
@@ -861,9 +861,9 @@ describe("LcdClient", () => {
 
       const signDoc1 = makeStdSignDoc([msg2, msg1], fee, wasmd.chainId, memo, an1, sequence1);
       const signDoc2 = makeStdSignDoc([msg2, msg1], fee, wasmd.chainId, memo, an2, sequence2);
-      const signature1 = await account1.sign(address1, signDoc1);
-      const signature2 = await account2.sign(address2, signDoc2);
-      const signedTx = {
+      const { signature: signature1 } = await account1.sign(address1, signDoc1);
+      const { signature: signature2 } = await account2.sign(address2, signDoc2);
+      const signedTx: StdTx = {
         msg: [msg2, msg1],
         fee: fee,
         memo: memo,
diff --git a/packages/launchpad/src/lcdapi/staking.spec.ts b/packages/launchpad/src/lcdapi/staking.spec.ts
index 5efcff6c..1f1809a9 100644
--- a/packages/launchpad/src/lcdapi/staking.spec.ts
+++ b/packages/launchpad/src/lcdapi/staking.spec.ts
@@ -47,7 +47,7 @@ describe("StakingExtension", () => {
         const memo = "Test delegation for wasmd";
         const { accountNumber, sequence } = await client.getSequence();
         const signDoc = makeStdSignDoc([msg], defaultFee, chainId, memo, accountNumber, sequence);
-        const signature = await wallet.sign(faucet.address, signDoc);
+        const { signature } = await wallet.sign(faucet.address, signDoc);
         const tx = {
           msg: [msg],
           fee: defaultFee,
@@ -70,7 +70,7 @@ describe("StakingExtension", () => {
         const memo = "Test undelegation for wasmd";
         const { accountNumber, sequence } = await client.getSequence();
         const signDoc = makeStdSignDoc([msg], defaultFee, chainId, memo, accountNumber, sequence);
-        const signature = await wallet.sign(faucet.address, signDoc);
+        const { signature } = await wallet.sign(faucet.address, signDoc);
         const tx = {
           msg: [msg],
           fee: defaultFee,
diff --git a/packages/launchpad/src/secp256k1wallet.spec.ts b/packages/launchpad/src/secp256k1wallet.spec.ts
index d2080321..87d6c7a9 100644
--- a/packages/launchpad/src/secp256k1wallet.spec.ts
+++ b/packages/launchpad/src/secp256k1wallet.spec.ts
@@ -120,7 +120,7 @@ describe("Secp256k1Wallet", () => {
         account_number: "7",
         sequence: "54",
       };
-      const signature = await wallet.sign(defaultAddress, signDoc);
+      const { signature } = await wallet.sign(defaultAddress, signDoc);
       const valid = await Secp256k1.verifySignature(
         Secp256k1Signature.fromFixedLength(fromBase64(signature.signature)),
         new Sha256(serializeSignDoc(signDoc)).digest(),
diff --git a/packages/launchpad/src/secp256k1wallet.ts b/packages/launchpad/src/secp256k1wallet.ts
index 6ffab6fa..dbba6b95 100644
--- a/packages/launchpad/src/secp256k1wallet.ts
+++ b/packages/launchpad/src/secp256k1wallet.ts
@@ -16,8 +16,7 @@ import { assert, isNonNullObject } from "@cosmjs/utils";
 import { rawSecp256k1PubkeyToAddress } from "./address";
 import { serializeSignDoc, StdSignDoc } from "./encoding";
 import { encodeSecp256k1Signature } from "./signature";
-import { AccountData, OfflineSigner } from "./signer";
-import { StdSignature } from "./types";
+import { AccountData, OfflineSigner, SignResponse } from "./signer";
 import {
   decrypt,
   encrypt,
@@ -256,14 +255,17 @@ export class Secp256k1Wallet implements OfflineSigner {
     ];
   }
 
-  public async sign(signerAddress: string, signDoc: StdSignDoc): Promise<StdSignature> {
+  public async sign(signerAddress: string, signDoc: StdSignDoc): Promise<SignResponse> {
     if (signerAddress !== this.address) {
       throw new Error(`Address ${signerAddress} not found in wallet`);
     }
     const message = new Sha256(serializeSignDoc(signDoc)).digest();
     const signature = await Secp256k1.createSignature(message, this.privkey);
     const signatureBytes = new Uint8Array([...signature.r(32), ...signature.s(32)]);
-    return encodeSecp256k1Signature(this.pubkey, signatureBytes);
+    return {
+      signedDoc: signDoc,
+      signature: encodeSecp256k1Signature(this.pubkey, signatureBytes),
+    };
   }
 
   /**
diff --git a/packages/launchpad/src/signer.ts b/packages/launchpad/src/signer.ts
index e2eb4868..6eff4d13 100644
--- a/packages/launchpad/src/signer.ts
+++ b/packages/launchpad/src/signer.ts
@@ -10,6 +10,15 @@ export interface AccountData {
   readonly pubkey: Uint8Array;
 }
 
+export interface SignResponse {
+  /**
+   * The sign doc that was signed.
+   * This may be different from the input signDoc when the signer modifies it as part of the signing process.
+   */
+  readonly signedDoc: StdSignDoc;
+  readonly signature: StdSignature;
+}
+
 export interface OfflineSigner {
   /**
    * Get AccountData array from wallet. Rejects if not enabled.
@@ -19,8 +28,11 @@ export interface OfflineSigner {
   /**
    * Request signature from whichever key corresponds to provided bech32-encoded address. Rejects if not enabled.
    *
+   * The signer implementation may offer the user the ability to override parts of the signDoc. It must
+   * return the doc that was signed in the response.
+   *
    * @param signerAddress The address of the account that should sign the transaction
    * @param signDoc The content that should be signed
    */
-  readonly sign: (signerAddress: string, signDoc: StdSignDoc) => Promise<StdSignature>;
+  readonly sign: (signerAddress: string, signDoc: StdSignDoc) => Promise<SignResponse>;
 }
diff --git a/packages/launchpad/src/signingcosmosclient.ts b/packages/launchpad/src/signingcosmosclient.ts
index fa9ba345..a8599fe5 100644
--- a/packages/launchpad/src/signingcosmosclient.ts
+++ b/packages/launchpad/src/signingcosmosclient.ts
@@ -89,7 +89,7 @@ export class SigningCosmosClient extends CosmosClient {
     const { accountNumber, sequence } = await this.getSequence();
     const chainId = await this.getChainId();
     const signDoc = makeStdSignDoc(msgs, fee, chainId, memo, accountNumber, sequence);
-    const signature = await this.signer.sign(this.senderAddress, signDoc);
+    const { signature } = await this.signer.sign(this.senderAddress, signDoc);
     const signedTx: StdTx = {
       msg: msgs,
       fee: fee,
diff --git a/packages/launchpad/types/index.d.ts b/packages/launchpad/types/index.d.ts
index de247a1e..a767b1ef 100644
--- a/packages/launchpad/types/index.d.ts
+++ b/packages/launchpad/types/index.d.ts
@@ -96,7 +96,7 @@ export {
 } from "./pubkey";
 export { findSequenceForSignedTx } from "./sequence";
 export { encodeSecp256k1Signature, decodeSignature } from "./signature";
-export { AccountData, Algo, OfflineSigner } from "./signer";
+export { AccountData, Algo, OfflineSigner, SignResponse } from "./signer";
 export { CosmosFeeTable, SigningCosmosClient } from "./signingcosmosclient";
 export { isStdTx, pubkeyType, CosmosSdkTx, PubKey, StdFee, StdSignature, StdTx } from "./types";
 export { makeCosmoshubPath, executeKdf, KdfConfiguration } from "./wallet";
diff --git a/packages/launchpad/types/secp256k1wallet.d.ts b/packages/launchpad/types/secp256k1wallet.d.ts
index aa241a86..29c7b63d 100644
--- a/packages/launchpad/types/secp256k1wallet.d.ts
+++ b/packages/launchpad/types/secp256k1wallet.d.ts
@@ -1,7 +1,6 @@
 import { HdPath } from "@cosmjs/crypto";
 import { StdSignDoc } from "./encoding";
-import { AccountData, OfflineSigner } from "./signer";
-import { StdSignature } from "./types";
+import { AccountData, OfflineSigner, SignResponse } from "./signer";
 import { EncryptionConfiguration, KdfConfiguration } from "./wallet";
 /**
  * This interface describes a JSON object holding the encrypted wallet and the meta data.
@@ -87,7 +86,7 @@ export declare class Secp256k1Wallet implements OfflineSigner {
   get mnemonic(): string;
   private get address();
   getAccounts(): Promise<readonly AccountData[]>;
-  sign(signerAddress: string, signDoc: StdSignDoc): Promise<StdSignature>;
+  sign(signerAddress: string, signDoc: StdSignDoc): Promise<SignResponse>;
   /**
    * Generates an encrypted serialization of this wallet.
    *
diff --git a/packages/launchpad/types/signer.d.ts b/packages/launchpad/types/signer.d.ts
index 3a2e17e3..60d4aad9 100644
--- a/packages/launchpad/types/signer.d.ts
+++ b/packages/launchpad/types/signer.d.ts
@@ -7,6 +7,14 @@ export interface AccountData {
   readonly algo: Algo;
   readonly pubkey: Uint8Array;
 }
+export interface SignResponse {
+  /**
+   * The sign doc that was signed.
+   * This may be different from the input signDoc when the signer modifies it as part of the signing process.
+   */
+  readonly signedDoc: StdSignDoc;
+  readonly signature: StdSignature;
+}
 export interface OfflineSigner {
   /**
    * Get AccountData array from wallet. Rejects if not enabled.
@@ -15,8 +23,11 @@ export interface OfflineSigner {
   /**
    * Request signature from whichever key corresponds to provided bech32-encoded address. Rejects if not enabled.
    *
+   * The signer implementation may offer the user the ability to override parts of the signDoc. It must
+   * return the doc that was signed in the response.
+   *
    * @param signerAddress The address of the account that should sign the transaction
    * @param signDoc The content that should be signed
    */
-  readonly sign: (signerAddress: string, signDoc: StdSignDoc) => Promise<StdSignature>;
+  readonly sign: (signerAddress: string, signDoc: StdSignDoc) => Promise<SignResponse>;
 }