eth: clarify the error string on getlogs failure (ethereum#24617)

This PR makes the errors we spit out a bit more clear about what block is problematic.

eth/api_backend.go

@@ -19,6 +19,7 @@ package eth
 import (
 	"context"
 	"errors"
+	"fmt"
 	"math/big"
 	"time"
 
@@ -189,11 +190,11 @@ func (b *EthAPIBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*typ
 	db := b.eth.ChainDb()
 	number := rawdb.ReadHeaderNumber(db, hash)
 	if number == nil {
-		return nil, errors.New("failed to get block number from hash")
+		return nil, fmt.Errorf("failed to get block number for hash %#x", hash)
 	}
 	logs := rawdb.ReadLogs(db, hash, *number, b.eth.blockchain.Config())
 	if logs == nil {
-		return nil, errors.New("failed to get logs for block")
+		return nil, fmt.Errorf("failed to get logs for block #%d (0x%s)", *number, hash.TerminalString())
 	}
 	return logs, nil
 }