diff --git a/Cargo.lock b/Cargo.lock
index 5ec13e5..e07b7f1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1498,6 +1498,23 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
+[[package]]
+name = "hello-world-counter"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "cosmwasm-schema 2.0.2",
+ "cosmwasm-std 2.0.2",
+ "cw-storage-plus 2.0.0",
+ "cw2 2.0.0",
+ "easy-addr",
+ "nibiru-std",
+ "schemars",
+ "serde",
+ "serde_json",
+ "thiserror",
+]
+
 [[package]]
 name = "hex"
 version = "0.4.3"
diff --git a/artifacts/broker_bank.wasm b/artifacts/broker_bank.wasm
index 405c9fe..f782f96 100644
Binary files a/artifacts/broker_bank.wasm and b/artifacts/broker_bank.wasm differ
diff --git a/artifacts/broker_staking.wasm b/artifacts/broker_staking.wasm
index 1e9475d..c03df2e 100644
Binary files a/artifacts/broker_staking.wasm and b/artifacts/broker_staking.wasm differ
diff --git a/artifacts/checksums.txt b/artifacts/checksums.txt
index c999a17..865dfa7 100644
--- a/artifacts/checksums.txt
+++ b/artifacts/checksums.txt
@@ -1,13 +1,15 @@
-e3d3422db32e4e6ebe0247a22f6be733ccf6b637bfeb4ff8ffcd8122a68d7853  broker_bank.wasm
-40288f4cda1e48740269ab6425ca234b9b99419c165aaf1d410fa37c40843e49  broker_staking.wasm
+7b674c043971df4c0a362ab8f6142680afeae32f4be88fc6a5d1e8c0e7dab680  broker_bank.wasm
+b544cf24505320138bcd467ab73e8c2a206fe926113e61cf2caeb604d2e25b25  broker_staking.wasm
 382c05baf544f2886de849933ecf59e8bc3bcdcdd552d5a63537bd6d63f2ecf1  controller.wasm
-ed4a89ae4669b22863fcabd18e3bd7e40d039899f863a07eb0449eed059a898e  core_token_vesting_v2.wasm
-b56a880d4c67d9f353f549b502256f73159f89b50aa6dae683948e117efa4792  cw3_flex_multisig.wasm
-1ecff403bbf3b5fcedccb5de76a0ef5f1fdbcc5f60890e3388f5425584899f0b  incentives.wasm
-dc89ed88f1c69bf63fc284492b7bf6935e3a85da2945067d70f71f08c01df60d  lockup.wasm
-222eac4e17c7ddffbecde0b196bc06ed1e458b8578ab25ed200a6fd7db4e5eda  nibi_stargate.wasm
-ef5b4de76526713e3531c3b9bbc4620b5d61599c4a0e8605365ebb0f1d7ee2ac  nibi_stargate_perp.wasm
-0074489ff40c8ecbd766f7140b32d288dcaf7302ba630d452f79e7d292ea57ef  nusd_valuator.wasm
-955592d08017aa41f3c9ba3883153d6de024e8c7a3a79aa3b664a241ec1e7a19  pricefeed.wasm
-89e3236c932a73575bf39da532bcb93f8e4a5f4a3a7f3836e43f8970993eb809  shifter.wasm
-8d982ca2d679ea8d44f825fe91a3d4e0cb92150b12e4684497eee9e76991d247  token_vesting.wasm
+77efd174302c8d4622c1ce855b652aeefd3695064caaba90582bac89213a3187  core_token_vesting_v2.wasm
+6b447bd36b84ec14c602c92ff5a2efbec6b9970ea984ee43e4829570c0dc75e3  cw3_fixed_multisig.wasm
+8999a6e88c168045833de9a5f77529856ece75a14556aedd3a79c7eda60a3f6a  cw3_flex_multisig.wasm
+aede52ea6c6e1df652d77da770111e12a606e7718ac54d07a792c509bbb1081e  hello_world_counter.wasm
+55aef2add88da435dd5bf11aa29eb51edab909a03515e701f771b2869ca43fe1  incentives.wasm
+cbd8a9774b2da7d9aceeec555bc44cd20252a05a0ad50b4968a5041df06df8b3  lockup.wasm
+32ccda53511b00dffa0bd5b95ef11165a03c955545aac6d2ecc21830e9f610b2  nibi_stargate.wasm
+74fc402b1b31336838fdc814f89f17a7ffe4b019422097b38d92e92fd61d6c64  nibi_stargate_perp.wasm
+6de11082ba049deaf4702329195f065e555f51a7fbb7d102443e94e75beee1da  nusd_valuator.wasm
+83d4b903c7aed4f19f8b762ef6bccf286de68ac71fd6e0149fb46274afda7379  pricefeed.wasm
+3c9725f2171571f17f921da0bbb60606838d2ad1861f2790d820f79d819036c5  shifter.wasm
+584685070441058ff7185e9143113703e09a53852b29795aaaf2e9902eab1ceb  token_vesting.wasm
diff --git a/artifacts/core_token_vesting_v2.wasm b/artifacts/core_token_vesting_v2.wasm
index 31f078d..1ae8436 100644
Binary files a/artifacts/core_token_vesting_v2.wasm and b/artifacts/core_token_vesting_v2.wasm differ
diff --git a/artifacts/cw3_fixed_multisig.wasm b/artifacts/cw3_fixed_multisig.wasm
new file mode 100644
index 0000000..53dea36
Binary files /dev/null and b/artifacts/cw3_fixed_multisig.wasm differ
diff --git a/artifacts/cw3_flex_multisig.wasm b/artifacts/cw3_flex_multisig.wasm
index 08fbc57..51e1444 100644
Binary files a/artifacts/cw3_flex_multisig.wasm and b/artifacts/cw3_flex_multisig.wasm differ
diff --git a/artifacts/hello_world_counter.wasm b/artifacts/hello_world_counter.wasm
new file mode 100644
index 0000000..9a532ca
Binary files /dev/null and b/artifacts/hello_world_counter.wasm differ
diff --git a/artifacts/incentives.wasm b/artifacts/incentives.wasm
index 2bbfd30..0b21f53 100644
Binary files a/artifacts/incentives.wasm and b/artifacts/incentives.wasm differ
diff --git a/artifacts/lockup.wasm b/artifacts/lockup.wasm
index 9c1c8d3..87fea86 100644
Binary files a/artifacts/lockup.wasm and b/artifacts/lockup.wasm differ
diff --git a/artifacts/nibi_stargate.wasm b/artifacts/nibi_stargate.wasm
index fb0d82c..c308272 100644
Binary files a/artifacts/nibi_stargate.wasm and b/artifacts/nibi_stargate.wasm differ
diff --git a/artifacts/nibi_stargate_perp.wasm b/artifacts/nibi_stargate_perp.wasm
index 980b239..e9576b2 100644
Binary files a/artifacts/nibi_stargate_perp.wasm and b/artifacts/nibi_stargate_perp.wasm differ
diff --git a/artifacts/nusd_valuator.wasm b/artifacts/nusd_valuator.wasm
index 77cb624..0ee2fb8 100644
Binary files a/artifacts/nusd_valuator.wasm and b/artifacts/nusd_valuator.wasm differ
diff --git a/artifacts/pricefeed.wasm b/artifacts/pricefeed.wasm
index 67ed1c2..02a2bc7 100644
Binary files a/artifacts/pricefeed.wasm and b/artifacts/pricefeed.wasm differ
diff --git a/artifacts/shifter.wasm b/artifacts/shifter.wasm
index 63de3a9..89b95b2 100644
Binary files a/artifacts/shifter.wasm and b/artifacts/shifter.wasm differ
diff --git a/artifacts/token_vesting.wasm b/artifacts/token_vesting.wasm
index 38f8c11..e59f0e4 100644
Binary files a/artifacts/token_vesting.wasm and b/artifacts/token_vesting.wasm differ
diff --git a/contracts/00-hello-world-counter/.cargo/config.toml b/contracts/00-hello-world-counter/.cargo/config.toml
new file mode 100644
index 0000000..051a969
--- /dev/null
+++ b/contracts/00-hello-world-counter/.cargo/config.toml
@@ -0,0 +1,9 @@
+[alias]
+wasm = "build --release --lib --target wasm32-unknown-unknown"
+wasm-debug = "build --lib --target wasm32-unknown-unknown"
+schema = "run --bin schema"
+
+# OLDER:
+# wasm = "build --release --target wasm32-unknown-unknown"
+# wasm-debug = "build --target wasm32-unknown-unknown"
+# schema = "run --example schema"
\ No newline at end of file
diff --git a/contracts/00-hello-world-counter/Cargo.toml b/contracts/00-hello-world-counter/Cargo.toml
new file mode 100644
index 0000000..ef9e467
--- /dev/null
+++ b/contracts/00-hello-world-counter/Cargo.toml
@@ -0,0 +1,31 @@
+[package]
+name = "hello-world-counter"
+version = "0.1.0"
+edition = "2021"
+homepage = { workspace = true }
+repository = { workspace = true }
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+# features.library: Use the library feature to disable all
+# instantiate/execute/query exports. This is necessary use this as a dependency
+# for another smart contract crate.
+library = []
+
+[dependencies]
+cosmwasm-std = { workspace = true }
+cosmwasm-schema = { workspace = true }
+cw-storage-plus = { workspace = true }
+schemars = { workspace = true }
+serde = { workspace = true }
+thiserror = { workspace = true }
+nibiru-std = { workspace = true }
+cw2 = { workspace = true }
+serde_json = { workspace = true }
+anyhow = { workspace = true }
+
+[dev-dependencies]
+easy-addr = { workspace = true }
\ No newline at end of file
diff --git a/contracts/00-hello-world-counter/README.md b/contracts/00-hello-world-counter/README.md
new file mode 100644
index 0000000..c1a9a18
--- /dev/null
+++ b/contracts/00-hello-world-counter/README.md
@@ -0,0 +1,4 @@
+# contracts/00-hello-world-counter
+
+The classic "counter" smart contract. It serves as a hello-world example on
+how to implement execute messages and queries in Wasm.
\ No newline at end of file
diff --git a/contracts/00-hello-world-counter/src/contract.rs b/contracts/00-hello-world-counter/src/contract.rs
new file mode 100644
index 0000000..496e197
--- /dev/null
+++ b/contracts/00-hello-world-counter/src/contract.rs
@@ -0,0 +1,185 @@
+use cosmwasm_std::{
+    to_json_binary, Binary, Deps, DepsMut, Env, MessageInfo, Response,
+};
+use cw2::set_contract_version;
+
+use crate::{
+    msg::{ExecuteMsg, InstantiateMsg, QueryMsg},
+    state::{State, STATE},
+};
+
+type ContractError = anyhow::Error;
+
+#[cfg_attr(not(feature = "library"), cosmwasm_std::entry_point)]
+pub fn instantiate(
+    deps: DepsMut,
+    _env: Env,
+    info: MessageInfo,
+    msg: InstantiateMsg,
+) -> Result<Response, ContractError> {
+    set_contract_version(
+        deps.storage,
+        format!("nibiru-wasm/contracts/{CONTRACT_NAME}"),
+        CONTRACT_VERSION,
+    )?;
+
+    STATE.save(
+        deps.storage,
+        &State {
+            count: msg.count,
+            owner: info.sender.clone(),
+        },
+    )?;
+    Ok(Response::default())
+}
+
+#[cfg_attr(not(feature = "library"), cosmwasm_std::entry_point)]
+pub fn execute(
+    deps: DepsMut,
+    _env: Env,
+    info: MessageInfo,
+    msg: ExecuteMsg,
+) -> Result<Response, ContractError> {
+    match msg {
+        ExecuteMsg::Increment {} => {
+            STATE.update(
+                deps.storage,
+                |mut state| -> Result<_, anyhow::Error> {
+                    state.count += 1;
+                    Ok(state)
+                },
+            )?;
+            Ok(Response::default())
+        }
+        ExecuteMsg::Reset { count } => {
+            STATE.update(
+                deps.storage,
+                |mut state| -> Result<_, anyhow::Error> {
+                    let owner = state.owner.clone();
+                    if info.sender != owner {
+                        return Err(anyhow::anyhow!(
+                            "Unauthorized: only the owner ({owner}) can use reset",
+                        ));
+                    }
+                    state.count = count;
+                    Ok(state)
+                },
+            )?;
+            Ok(Response::default())
+        }
+    }
+}
+
+#[cfg_attr(not(feature = "library"), cosmwasm_std::entry_point)]
+pub fn query(
+    deps: Deps,
+    _env: Env,
+    msg: QueryMsg,
+) -> Result<Binary, ContractError> {
+    match msg {
+        QueryMsg::Count {} => {
+            let state = STATE.load(deps.storage)?;
+            Ok(to_json_binary(&state)?)
+        }
+    }
+}
+
+pub const CONTRACT_NAME: &str = env!("CARGO_PKG_NAME");
+pub const CONTRACT_VERSION: &str = env!("CARGO_PKG_VERSION");
+
+#[cfg(test)]
+pub mod tests {
+
+    use easy_addr;
+    use nibiru_std::errors::TestResult;
+
+    use crate::{
+        contract::{execute, query},
+        msg::{ExecuteMsg, QueryMsg},
+        state::State,
+        tutil::{mock_info_for_sender, setup_contract, TEST_OWNER},
+    };
+
+    struct TestCaseExec<'a> {
+        exec_msg: ExecuteMsg,
+        sender: &'a str,
+        err: Option<&'a str>,
+        start_count: i64,
+        want_count_after: i64,
+    }
+
+    /// Test that all owner-gated execute calls fail when the tx sender is not
+    /// the smart contract owner.
+    #[test]
+    pub fn test_exec() -> TestResult {
+        let not_owner = easy_addr::addr!("not-owner");
+
+        let test_cases: Vec<TestCaseExec> = vec![
+            TestCaseExec {
+                sender: not_owner,
+                exec_msg: ExecuteMsg::Increment {},
+                err: None,
+                start_count: 0,
+                want_count_after: 1,
+            },
+            TestCaseExec {
+                sender: not_owner,
+                exec_msg: ExecuteMsg::Increment {},
+                err: None,
+                start_count: -70,
+                want_count_after: -69,
+            },
+            TestCaseExec {
+                sender: TEST_OWNER,
+                exec_msg: ExecuteMsg::Reset { count: 25 },
+                err: None,
+                start_count: std::i64::MAX,
+                want_count_after: 25,
+            },
+            TestCaseExec {
+                sender: TEST_OWNER,
+                exec_msg: ExecuteMsg::Reset { count: -25 },
+                err: None,
+                start_count: 0,
+                want_count_after: -25,
+            },
+            TestCaseExec {
+                sender: not_owner,
+                exec_msg: ExecuteMsg::Reset { count: 25 },
+                err: Some("Unauthorized: only the owner"),
+                start_count: 0,      // unused
+                want_count_after: 0, // unused
+            },
+        ];
+
+        for tc in &test_cases {
+            // instantiate smart contract from the owner
+            let (mut deps, env, _info) = setup_contract(tc.start_count)?;
+
+            // send the exec msg and it should fail.
+            let info = mock_info_for_sender(tc.sender);
+            let res =
+                execute(deps.as_mut(), env.clone(), info, tc.exec_msg.clone());
+
+            if let Some(want_err) = tc.err {
+                let err = res.expect_err("err should be defined");
+                let is_contained = err.to_string().contains(want_err);
+                assert!(is_contained, "got error {}", err);
+                continue;
+            }
+
+            let res = res?;
+            assert_eq!(res.messages.len(), 0);
+
+            let query_req = QueryMsg::Count {};
+            let binary = query(deps.as_ref(), env, query_req)?;
+            let query_resp: State = cosmwasm_std::from_json(binary)?;
+
+            let state = query_resp;
+            let got_count_after = state.count;
+            assert_eq!(got_count_after, tc.want_count_after);
+            assert_eq!(state.owner.as_str(), TEST_OWNER);
+        }
+        Ok(())
+    }
+}
diff --git a/contracts/00-hello-world-counter/src/lib.rs b/contracts/00-hello-world-counter/src/lib.rs
new file mode 100644
index 0000000..86d02b4
--- /dev/null
+++ b/contracts/00-hello-world-counter/src/lib.rs
@@ -0,0 +1,5 @@
+pub mod contract;
+pub mod msg;
+pub mod state;
+#[cfg(test)]
+pub mod tutil;
diff --git a/contracts/00-hello-world-counter/src/msg.rs b/contracts/00-hello-world-counter/src/msg.rs
new file mode 100644
index 0000000..4f423ff
--- /dev/null
+++ b/contracts/00-hello-world-counter/src/msg.rs
@@ -0,0 +1,21 @@
+use crate::state;
+use cosmwasm_schema::cw_serde;
+
+#[cw_serde]
+pub enum ExecuteMsg {
+    Increment {},         // Increase count by 1
+    Reset { count: i64 }, // Reset to any i64 value
+}
+
+#[cw_serde]
+#[derive(cosmwasm_schema::QueryResponses)]
+pub enum QueryMsg {
+    // Count returns the JSON-encoded state
+    #[returns(state::State)]
+    Count {},
+}
+
+#[cw_serde]
+pub struct InstantiateMsg {
+    pub count: i64,
+}
diff --git a/contracts/00-hello-world-counter/src/state.rs b/contracts/00-hello-world-counter/src/state.rs
new file mode 100644
index 0000000..7603437
--- /dev/null
+++ b/contracts/00-hello-world-counter/src/state.rs
@@ -0,0 +1,11 @@
+use cosmwasm_schema::cw_serde;
+use cosmwasm_std::Addr;
+use cw_storage_plus::Item;
+
+pub const STATE: Item<State> = Item::new("state");
+
+#[cw_serde]
+pub struct State {
+    pub count: i64,
+    pub owner: Addr,
+}
diff --git a/contracts/00-hello-world-counter/src/tutil.rs b/contracts/00-hello-world-counter/src/tutil.rs
new file mode 100644
index 0000000..7bcc630
--- /dev/null
+++ b/contracts/00-hello-world-counter/src/tutil.rs
@@ -0,0 +1,47 @@
+//! tutil.rs: Test helpers for the contract
+#![cfg(not(target_arch = "wasm32"))]
+
+use cosmwasm_std::{Env, MessageInfo, OwnedDeps};
+
+#[cfg(not(target_arch = "wasm32"))]
+use cosmwasm_std::testing::{
+    mock_dependencies, mock_env, mock_info, MockApi, MockQuerier, MockStorage,
+};
+
+use crate::{contract::instantiate, msg::InstantiateMsg};
+
+pub const TEST_OWNER: &str = easy_addr::addr!("owner");
+
+pub fn setup_contract(
+    count: i64,
+) -> anyhow::Result<(
+    OwnedDeps<MockStorage, MockApi, MockQuerier>,
+    Env,
+    MessageInfo,
+)> {
+    let mut deps = mock_dependencies();
+    let env = mock_env();
+    let info = mock_info(TEST_OWNER, &[]);
+    let msg = InstantiateMsg { count };
+    let res = instantiate(deps.as_mut(), env.clone(), info.clone(), msg)?;
+    assert_eq!(0, res.messages.len());
+    Ok((deps, env, info))
+}
+
+pub fn setup_contract_defaults() -> anyhow::Result<(
+    OwnedDeps<MockStorage, MockApi, MockQuerier>,
+    Env,
+    MessageInfo,
+)> {
+    setup_contract(0)
+}
+
+pub fn mock_info_for_sender(sender: &str) -> MessageInfo {
+    mock_info(sender, &[])
+}
+
+pub fn mock_env_height(height: u64) -> Env {
+    let mut env = mock_env();
+    env.block.height = height;
+    env
+}
diff --git a/contracts/broker-bank/Cargo.toml b/contracts/broker-bank/Cargo.toml
index 053d1e8..ccfdf1b 100644
--- a/contracts/broker-bank/Cargo.toml
+++ b/contracts/broker-bank/Cargo.toml
@@ -3,7 +3,7 @@ name = "broker-bank"
 version = "0.1.0"
 edition = "2021"
 homepage = { workspace = true }
-repository = "https://github.com/NibiruChain/nibiru-wasm"
+repository = { workspace = true }
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [lib]