main: let follow accept have a local id

Cargo.lock

@@ -255,6 +255,7 @@ dependencies = [
  "tokio-postgres",
  "tracing",
  "tracing-subscriber",
+ "urlencoding",
 ]
 
 [[package]]
@@ -2090,6 +2091,12 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "urlencoding"
+version = "2.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8db7427f936968176eaa7cdf81b7f98b980b18495ec28f1b5791ac3bfe3eea9"
+
 [[package]]
 name = "utf8-cstr"
 version = "0.1.6"

Cargo.toml

@@ -30,3 +30,4 @@ metrics = "0.20"
 metrics-util = "0.14"
 metrics-exporter-prometheus = "0.11"
 deunicode = "1.3"
+urlencoding = "2"

src/main.rs

@@ -174,12 +174,18 @@ async fn post_relay(
         let priv_key = state.priv_key.clone();
         let client = state.client.clone();
         tokio::spawn(async move {
+            let accept_id = format!(
+                "https://{}/activity/accept/{}/{}",
+                state.hostname,
+                urlencoding::encode(&target.uri()),
+                urlencoding::encode(&remote_actor.inbox),
+            );
             let accept = activitypub::Action {
                 jsonld_context: serde_json::Value::String("https://www.w3.org/ns/activitystreams".to_string()),
                 action_type: "Accept".to_string(),
                 actor: target.uri(),
                 to: Some(json!(remote_actor.id.clone())),
-                id: action.id,
+                id: accept_id,
                 object: Some(endpoint.payload),
             };
             let result = send::send(