diff --git a/packages/cli/examples/instantiate2_addresses.ts b/packages/cli/examples/instantiate2_addresses.ts
index 432ee5bf..18050b5b 100644
--- a/packages/cli/examples/instantiate2_addresses.ts
+++ b/packages/cli/examples/instantiate2_addresses.ts
@@ -1,53 +1,5 @@
-import { fromBech32, fromHex, fromUtf8, toAscii, toBech32, toHex, toUtf8 } from "@cosmjs/encoding";
-import { Sha256, sha256 } from "@cosmjs/crypto";
-import { Uint64 } from "@cosmjs/math";
-import { assert } from "@cosmjs/utils";
-
-/**
- * The "Basic Address" Hash from
- * https://github.com/cosmos/cosmos-sdk/blob/v0.45.8/docs/architecture/adr-028-public-key-addresses.md
- */
-function hash(type: string, key: Uint8Array): Uint8Array {
-  return new Sha256(sha256(toAscii(type))).update(key).digest();
-}
-
-/**
- * Takes an integer [0, 2**64-1] and returns a one-byte encoding of it.
- */
-function toUint64(int: number): Uint8Array {
-  return Uint64.fromNumber(int).toBytesBigEndian();
-}
-
-/** See https://github.com/CosmWasm/wasmd/pull/1014 */
-function deterministicContractAddress(
-  checksum: Uint8Array,
-  creator: string,
-  salt: Uint8Array,
-  msg: Uint8Array,
-  prefix: string,
-) {
-  assert(checksum.length === 32);
-  const creatorData = fromBech32(creator).data;
-
-  // Validate inputs
-  if (salt.length < 1 || salt.length > 64) throw new Error("Salt must be between 1 and 64 bytes");
-
-  const key = new Uint8Array([
-    ...toAscii("wasm"),
-    0x00,
-    ...toUint64(checksum.length),
-    ...checksum,
-    ...toUint64(creatorData.length),
-    ...creatorData,
-    ...toUint64(salt.length),
-    ...salt,
-    ...toUint64(msg.length),
-    ...msg,
-  ]);
-  const addressData = hash("module", key);
-  const address = toBech32(prefix, addressData);
-  return { key, addressData, address };
-}
+import { fromBech32, fromHex, toBech32, toHex, toUtf8 } from "@cosmjs/encoding";
+import { _instantiate2AddressIntermediate } from "@cosmjs/cosmwasm-stargate";
 
 function makeTestingAddress(length: number): string {
   let data = new Uint8Array(length);
@@ -80,7 +32,7 @@ for (let checksum of checksums) {
     for (let salt of salts) {
       for (let msg of msgs) {
         const encodedMsg = typeof msg === "string" ? toUtf8(msg) : new Uint8Array();
-        const { key, addressData, address } = deterministicContractAddress(
+        const { key, addressData, address } = _instantiate2AddressIntermediate(
           checksum,
           creator,
           salt,
diff --git a/packages/cosmwasm-stargate/src/index.ts b/packages/cosmwasm-stargate/src/index.ts
index c41663d9..cf3a0cc6 100644
--- a/packages/cosmwasm-stargate/src/index.ts
+++ b/packages/cosmwasm-stargate/src/index.ts
@@ -1,5 +1,6 @@
 export { Code, CodeDetails, Contract, ContractCodeHistoryEntry, CosmWasmClient } from "./cosmwasmclient";
 export { fromBinary, toBinary } from "./encoding";
+export { _instantiate2AddressIntermediate, instantiate2Address } from "./instantiate2_address";
 export {
   cosmWasmTypes,
   createWasmAminoConverters,
diff --git a/packages/cosmwasm-stargate/src/instantiate2_address.ts b/packages/cosmwasm-stargate/src/instantiate2_address.ts
new file mode 100644
index 00000000..bf919039
--- /dev/null
+++ b/packages/cosmwasm-stargate/src/instantiate2_address.ts
@@ -0,0 +1,64 @@
+import { Sha256, sha256 } from "@cosmjs/crypto";
+import { fromBech32, toAscii, toBech32 } from "@cosmjs/encoding";
+import { Uint64 } from "@cosmjs/math";
+import { assert } from "@cosmjs/utils";
+
+/**
+ * The "Basic Address" Hash from
+ * https://github.com/cosmos/cosmos-sdk/blob/v0.45.8/docs/architecture/adr-028-public-key-addresses.md
+ */
+function hash(type: string, key: Uint8Array): Uint8Array {
+  return new Sha256(sha256(toAscii(type))).update(key).digest();
+}
+
+/**
+ * Takes an integer [0, 2**64-1] and returns a one-byte encoding of it.
+ */
+function toUint64(int: number): Uint8Array {
+  return Uint64.fromNumber(int).toBytesBigEndian();
+}
+
+/**
+ * Private function to export test vector data for https://github.com/cosmos/cosmjs/pull/1253.
+ * Do not use in production code.
+ */
+// eslint-disable-next-line @typescript-eslint/naming-convention
+export function _instantiate2AddressIntermediate(
+  checksum: Uint8Array,
+  creator: string,
+  salt: Uint8Array,
+  msg: Uint8Array,
+  prefix: string,
+): { key: Uint8Array; addressData: Uint8Array; address: string } {
+  assert(checksum.length === 32);
+  const creatorData = fromBech32(creator).data;
+
+  // Validate inputs
+  if (salt.length < 1 || salt.length > 64) throw new Error("Salt must be between 1 and 64 bytes");
+
+  const key = new Uint8Array([
+    ...toAscii("wasm"),
+    0x00,
+    ...toUint64(checksum.length),
+    ...checksum,
+    ...toUint64(creatorData.length),
+    ...creatorData,
+    ...toUint64(salt.length),
+    ...salt,
+    ...toUint64(msg.length),
+    ...msg,
+  ]);
+  const addressData = hash("module", key);
+  const address = toBech32(prefix, addressData);
+  return { key, addressData, address };
+}
+
+export function instantiate2Address(
+  checksum: Uint8Array,
+  creator: string,
+  salt: Uint8Array,
+  msg: Uint8Array,
+  prefix: string,
+): string {
+  return _instantiate2AddressIntermediate(checksum, creator, salt, msg, prefix).address;
+}