pkg/eth/backend.go

@@ -374,22 +374,12 @@ func (b *Backend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Blo
 		return nil, err
 	}
 
-	// When num. of uncles = 2,
+	// We should not have any non-determinism in the ordering of the uncles returned to us now
-	// Check if calculated uncle hash matches the one in header
-	// If not, re-order the two uncles
-	// Assumption: Max num. of uncles in mainnet = 2
-	if len(uncles) == 2 {
 	uncleHash := types.CalcUncleHash(uncles)
-		if uncleHash != header.UncleHash {
+	// Check if uncle hash matches expected hash
-			uncles[0], uncles[1] = uncles[1], uncles[0]
-
-			uncleHash = types.CalcUncleHash(uncles)
-			// Check if uncle hash matches after re-ordering
 	if uncleHash != header.UncleHash {
 		log.Error("uncle hash mismatch for block hash: ", hash.Hex())
 	}
-		}
-	}
 
 	// Fetch transactions
 	transactions, err := b.GetTransactionsByBlockHashAndNumber(tx, hash, blockNumber)
@@ -427,17 +417,11 @@ func (b *Backend) GetUnclesByBlockHash(tx *sqlx.Tx, hash common.Hash) ([]*types.
 		return nil, err
 	}
 
-	uncles := make([]*types.Header, len(uncleBytes))
+	uncles := make([]*types.Header, 0)
-	for i, bytes := range uncleBytes {
+	if err := rlp.DecodeBytes(uncleBytes, uncles); err != nil {
-		var uncle types.Header
-		err = rlp.DecodeBytes(bytes, &uncle)
-		if err != nil {
 		return nil, err
 	}
 
-		uncles[i] = &uncle
-	}
-
 	return uncles, nil
 }
 
@@ -448,17 +432,11 @@ func (b *Backend) GetUnclesByBlockHashAndNumber(tx *sqlx.Tx, hash common.Hash, n
 		return nil, err
 	}
 
-	uncles := make([]*types.Header, len(uncleBytes))
+	uncles := make([]*types.Header, 0)
-	for i, bytes := range uncleBytes {
+	if err := rlp.DecodeBytes(uncleBytes, uncles); err != nil {
-		var uncle types.Header
-		err = rlp.DecodeBytes(bytes, &uncle)
-		if err != nil {
 		return nil, err
 	}
 
-		uncles[i] = &uncle
-	}
-
 	return uncles, nil
 }
 

pkg/eth/retriever.go

@@ -365,34 +365,22 @@ func (r *Retriever) RetrieveHeaderByHash(tx *sqlx.Tx, hash common.Hash) (string,
 	return headerResult.CID, headerResult.Data, tx.Get(headerResult, RetrieveHeaderByHashPgStr, hash.Hex())
 }
 
-// RetrieveUncles returns the cids and rlp bytes for the uncles corresponding to the provided block hash, number (of non-omner root block)
+// RetrieveUncles returns the cid and rlp bytes for the uncle list corresponding to the provided block hash, number (of non-omner root block)
-func (r *Retriever) RetrieveUncles(tx *sqlx.Tx, hash common.Hash, number uint64) ([]string, [][]byte, error) {
+func (r *Retriever) RetrieveUncles(tx *sqlx.Tx, hash common.Hash, number uint64) (string, []byte, error) {
-	uncleResults := make([]ipldResult, 0)
+	uncleResult := new(ipldResult)
-	if err := tx.Select(&uncleResults, RetrieveUnclesPgStr, hash.Hex(), number); err != nil {
+	if err := tx.Select(uncleResult, RetrieveUnclesPgStr, hash.Hex(), number); err != nil {
-		return nil, nil, err
+		return "", nil, err
 	}
-	cids := make([]string, len(uncleResults))
+	return uncleResult.CID, uncleResult.Data, nil
-	uncles := make([][]byte, len(uncleResults))
-	for i, res := range uncleResults {
-		cids[i] = res.CID
-		uncles[i] = res.Data
-	}
-	return cids, uncles, nil
 }
 
-// RetrieveUnclesByBlockHash returns the cids and rlp bytes for the uncles corresponding to the provided block hash (of non-omner root block)
+// RetrieveUnclesByBlockHash returns the cid and rlp bytes for the uncle list corresponding to the provided block hash (of non-omner root block)
-func (r *Retriever) RetrieveUnclesByBlockHash(tx *sqlx.Tx, hash common.Hash) ([]string, [][]byte, error) {
+func (r *Retriever) RetrieveUnclesByBlockHash(tx *sqlx.Tx, hash common.Hash) (string, []byte, error) {
-	uncleResults := make([]ipldResult, 0)
+	uncleResult := new(ipldResult)
-	if err := tx.Select(&uncleResults, RetrieveUnclesByBlockHashPgStr, hash.Hex()); err != nil {
+	if err := tx.Select(uncleResult, RetrieveUnclesByBlockHashPgStr, hash.Hex()); err != nil {
-		return nil, nil, err
+		return "", nil, err
 	}
-	cids := make([]string, len(uncleResults))
+	return uncleResult.CID, uncleResult.Data, nil
-	uncles := make([][]byte, len(uncleResults))
-	for i, res := range uncleResults {
-		cids[i] = res.CID
-		uncles[i] = res.Data
-	}
-	return cids, uncles, nil
 }
 
 // RetrieveTransactions returns the cids and rlp bytes for the transactions corresponding to the provided block hash, number

pkg/eth/sql.go

@@ -20,7 +20,8 @@ const (
 											)
 										WHERE header_cids.block_hash = $1
 										AND header_cids.block_number = $2
-										ORDER BY uncle_cids.parent_hash`
+										ORDER BY uncle_cids.parent_hash
+										LIMIT 1`
 	RetrieveUnclesByBlockHashPgStr = `SELECT uncle_cids.cid, data
 										FROM eth.uncle_cids
 											INNER JOIN eth.header_cids ON (
@@ -32,7 +33,8 @@ const (
 												AND uncle_cids.block_number = blocks.block_number
 											)
 										WHERE header_cids.block_hash = $1
-										ORDER BY uncle_cids.parent_hash`
+										ORDER BY uncle_cids.parent_hash
+										LIMIT 1`
 	RetrieveTransactionsPgStr = `SELECT transaction_cids.cid, data
 											FROM eth.transaction_cids
 												INNER JOIN eth.header_cids ON (

pkg/graphql/graphql.go

@@ -36,6 +36,7 @@ import (
 
 	"github.com/cerc-io/ipld-eth-server/v4/pkg/eth"
 	"github.com/cerc-io/ipld-eth-server/v4/pkg/shared"
+	ipld_eth_statedb "github.com/cerc-io/ipld-eth-statedb"
 )
 
 var (