event emission

contracts/account/src/contract.rs

@@ -4,7 +4,7 @@ use cosmwasm_std::{
 };
 
 use crate::error::ContractError;
-use crate::execute::{add_auth_method, assert_self, remove_auth_method};
+use crate::execute::{add_auth_method, assert_self, emit, remove_auth_method};
 use crate::msg::{ExecuteMsg, MigrateMsg};
 use crate::{
     error::ContractResult,
@@ -90,6 +90,7 @@ pub fn execute(
             add_auth_method(deps, &env, add_authenticator)
         }
         ExecuteMsg::RemoveAuthMethod { id } => remove_auth_method(deps, env, *id),
+        ExecuteMsg::Emit { data } => emit(env, data.to_string()),
     }
 }
 

contracts/account/src/error.rs

@@ -78,6 +78,9 @@ pub enum ContractError {
     #[error("cannot override existing authenticator at index {index}")]
     OverridingIndex { index: u8 },
 
+    #[error("emit data too large")]
+    EmissionSizeExceeded,
+
     /// Doesn't support PartialEq, moved below
     #[error("{0}")]
     SerdeJSON(String),

contracts/account/src/execute.rs

@@ -259,6 +259,18 @@ pub fn remove_auth_method(deps: DepsMut, env: Env, id: u8) -> ContractResult<Res
     )
 }
 
+const MAX_SIZE: usize = 1024;
+pub fn emit(env: Env, data: String) -> ContractResult<Response> {
+    if data.len() > MAX_SIZE {
+        Err(ContractError::EmissionSizeExceeded)
+    } else {
+        let emit_event = Event::new("account_emit")
+            .add_attribute("address", env.contract.address)
+            .add_attribute("data", data);
+        Ok(Response::new().add_event(emit_event))
+    }
+}
+
 pub fn assert_self(sender: &Addr, contract: &Addr) -> ContractResult<()> {
     if sender != contract {
         return Err(ContractError::Unauthorized);

contracts/account/src/msg.rs

@@ -11,6 +11,7 @@ pub struct InstantiateMsg {
 pub enum ExecuteMsg {
     AddAuthMethod { add_authenticator: AddAuthenticator },
     RemoveAuthMethod { id: u8 },
+    Emit { data: String },
 }
 
 #[cw_serde]