feat: identity caching + metrics (#197)

* refactor: minimize function params

* fix: ci

* feat: identity cache Redis config

* fix: clippy

* feat: initial ENS lookup

* chore: remove wrong comment

* chore: remove unwraps

* feat: error handling for no ENS name or no avatar

* chore: pass error better

* fix: follow Rust API guidelines

* feat: metrics

* fix: hashicorp/terraform-provider-aws#28353

* feat: local Terraform development

* feat: metrics + caching

* feat: cache for a day

* chore: more logging

* chore: tweaks

* fix(ci): terraform fmt

* fix(ci): terraform fmt

* feat: replace cache-hit metric with source

* fix: ECS doesn't update if tag doesn't change

* chore: DRY result metrics collection

* fix: cache 404 responses, metrics

* chore: outdated comment

* chore: tweak error

Cargo.toml

@@ -63,7 +63,7 @@ axum-tungstenite = "0.2.0"
 
 rand = "0.8.4"
 prometheus-http-query = "0.6.6"
-ethers = "2.0.7"
+ethers = { version = "2.0.7", git = "https://github.com/gakonst/ethers-rs" } # using Git version because crates.io version fails clippy
 
 
 [dev-dependencies]

src/error.rs

@@ -58,9 +58,6 @@ pub enum RpcError {
     #[error("Invalid address")]
     IdentityInvalidAddress,
 
-    #[error("Identity not found. Error: {0}")]
-    IdentityNotFound(String),
-
     #[error("Ethers provider error: {0}")]
     EthersProviderError(ethers::providers::ProviderError),
 }
@@ -127,14 +124,6 @@ impl IntoResponse for RpcError {
                 )),
             )
                 .into_response(),
-            Self::IdentityNotFound(e) => (
-                StatusCode::NOT_FOUND,
-                Json(new_error_response(
-                    "address".to_string(),
-                    format!("Could not find the ENS name: {e}"),
-                )),
-            )
-                .into_response(),
             e => {
                 error!("Internal server error: {}", e);
                 (