Fixes

ethereum-explorer/.rustfmt.toml

@@ -0,0 +1 @@
+max_width = 120

ethereum-explorer/src/map_contract_events.rs

@@ -1,32 +1,33 @@
 use crate::pb::eth::event::v1::Event;
 use crate::pb::eth::event::v1::Events;
 use crate::util;
+use anyhow::anyhow;
 use anyhow::Ok;
 use substreams::errors::Error;
 use substreams::Hex;
 use substreams_ethereum::pb::eth::v2::Block;
-use anyhow::anyhow;
 
 #[substreams::handlers::map]
 fn map_contract_events(contract_address: String, blk: Block) -> Result<Events, Error> {
     verify_parameter(&contract_address)?;
-    
-    let events: Vec<Event> = blk.logs()
-            .filter(| log| log.address().to_vec() == Hex::decode(&contract_address).expect("already validated"))
-            .map(|log| Event { 
-                address: Hex::encode(log.address()), 
-                topics: log.topics().into_iter().map(| topic| Hex::encode(topic)).collect(), 
-                tx_hash: Hex::encode(&log.receipt.transaction.hash) 
-            })
-            .collect();
+
+    let events: Vec<Event> = blk
+        .logs()
+        .filter(|log| log.address().to_vec() == Hex::decode(&contract_address).expect("already validated"))
+        .map(|log| Event {
+            address: Hex::encode(log.address()),
+            topics: log.topics().into_iter().map(Hex::encode).collect(),
+            tx_hash: Hex::encode(&log.receipt.transaction.hash),
+        })
+        .collect();
 
     Ok(Events { events })
 }
 
 fn verify_parameter(address: &String) -> Result<(), Error> {
     if !util::is_address_valid(&address) {
-        return Err(anyhow!("Contract address is not valid"));
+        return Err(anyhow!("Contract address ({}) is not valid", address));
     }
 
     Ok(())
-}
+}

ethereum-explorer/src/map_filter_transactions.rs

@@ -1,9 +1,9 @@
 use crate::pb::eth::transaction::v1::{Transaction, Transactions};
 use crate::util;
+use anyhow::anyhow;
 use serde::Deserialize;
 use substreams::Hex;
-use substreams_ethereum::pb::eth::v2::{Block, TransactionTraceStatus, TransactionTrace};
-use anyhow::anyhow;
+use substreams_ethereum::pb::eth::v2::{Block, TransactionTrace, TransactionTraceStatus};
 
 #[derive(Deserialize)]
 struct TransactionFilterParams {
@@ -13,36 +13,54 @@ struct TransactionFilterParams {
 
 #[substreams::handlers::map]
 fn map_filter_transactions(params: String, blk: Block) -> Result<Transactions, Vec<substreams::errors::Error>> {
-    let filters: TransactionFilterParams = serde_qs::from_str(&params).unwrap();
-    verify_filter_params(&filters)?;
+    let filters = parse_filters_from_params(params)?;
 
-    let transactions: Vec<Transaction> = blk.transactions()
+    let transactions: Vec<Transaction> = blk
+        .transactions()
         .filter(|trans| apply_filter(&trans, &filters))
         .map(|trans| Transaction {
             from: Hex::encode(&trans.from),
             to: Hex::encode(&trans.to),
             hash: Hex::encode(&trans.hash),
-        }).collect();
-    
+        })
+        .collect();
 
-    Ok(Transactions {
-        transactions,
-    })
+    Ok(Transactions { transactions })
 }
 
-fn verify_filter_params(params: &TransactionFilterParams) -> Result<(), Vec<substreams::errors::Error>> {
+fn parse_filters_from_params(params: String) -> Result<TransactionFilterParams, Vec<substreams::errors::Error>> {
+    let parsed_result = serde_qs::from_str(&params);
+    if parsed_result.is_err() {
+        return Err(Vec::from([anyhow!("Unpexcted error while parsing parameters")]));
+    }
+
+    let filters = parsed_result.unwrap();
+    verify_filters(&filters)?;
+
+    Ok(filters)
+}
+
+fn verify_filters(params: &TransactionFilterParams) -> Result<(), Vec<substreams::errors::Error>> {
     let mut errors: Vec<substreams::errors::Error> = Vec::new();
 
     if params.from.is_some() && !util::is_address_valid(&params.from.as_ref().unwrap()) {
-        errors.push(anyhow!("'from' address is not valid"));
+        let from = params.from.as_ref().unwrap();
+
+        if !util::is_address_valid(from) {
+            errors.push(anyhow!("'from' address ({}) is not valid", from));
+        }
     }
 
     if params.to.is_some() && !util::is_address_valid(&params.to.as_ref().unwrap()) {
-        errors.push(anyhow!("'to' address is not valid"));
+        let to = params.to.as_ref().unwrap();
+
+        if !util::is_address_valid(to) {
+            errors.push(anyhow!("'to' address ({}) is not valid", to));
+        }
     }
 
     if errors.len() > 0 {
-        return Err(errors)
+        return Err(errors);
     }
 
     Ok(())
@@ -51,7 +69,8 @@ fn verify_filter_params(params: &TransactionFilterParams) -> Result<(), Vec<subs
 fn apply_filter(transaction: &TransactionTrace, filters: &TransactionFilterParams) -> bool {
     if !filter_by_parameter(&filters.from, &transaction.from)
         || !filter_by_parameter(&filters.to, &transaction.to)
-        || transaction.status != (TransactionTraceStatus::Succeeded as i32) {
+        || transaction.status != (TransactionTraceStatus::Succeeded as i32)
+    {
         return false;
     }
 
@@ -64,7 +83,7 @@ fn filter_by_parameter(parameter: &Option<String>, transaction_field: &Vec<u8>)
     }
 
     let parameter_as_vec = &Hex::decode(parameter.as_ref().unwrap()).expect("already verified");
-    if parameter_as_vec == transaction_field {
+    if transaction_field == parameter_as_vec {
         return true;
     }
 

ethereum-explorer/substreams.yaml

@@ -39,5 +39,7 @@ modules:
       type: proto:eth.event.v1.Events
 
 params:
+  # Filtering transactions with to = 0xdAC17F958D2ee523a2206206994597C13D831ec7 (USDT contract address)
   map_filter_transactions: "to=0xdAC17F958D2ee523a2206206994597C13D831ec7"
-  map_contract_events: "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d"  
+  # Getting the logs of the BoredApeYachtClub smart contract
+  map_contract_events: "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d"