diff --git a/consensus/bor/api.go b/consensus/bor/api.go
index 26d1efdaf115..6d72e309e3c5 100644
--- a/consensus/bor/api.go
+++ b/consensus/bor/api.go
@@ -75,13 +75,34 @@ func rankMapDifficulties(values map[common.Address]uint64) []difficultiesKV {
 }
 
 // GetSnapshotProposerSequence retrieves the in-turn signers of all sprints in a span
-func (api *API) GetSnapshotProposerSequence(number *rpc.BlockNumber) (BlockSigners, error) {
-	snapNumber := *number - 1
+func (api *API) GetSnapshotProposerSequence(blockNrOrHash *rpc.BlockNumberOrHash) (BlockSigners, error) {
+	var header *types.Header
+	//nolint:nestif
+	if blockNrOrHash == nil {
+		header = api.chain.CurrentHeader()
+	} else {
+		if blockNr, ok := blockNrOrHash.Number(); ok {
+			if blockNr == rpc.LatestBlockNumber {
+				header = api.chain.CurrentHeader()
+			} else {
+				header = api.chain.GetHeaderByNumber(uint64(blockNr))
+			}
+		} else {
+			if blockHash, ok := blockNrOrHash.Hash(); ok {
+				header = api.chain.GetHeaderByHash(blockHash)
+			}
+		}
+	}
 
-	var difficulties = make(map[common.Address]uint64)
+	if header == nil {
+		return BlockSigners{}, errUnknownBlock
+	}
 
+	snapNumber := rpc.BlockNumber(header.Number.Int64() - 1)
 	snap, err := api.GetSnapshot(&snapNumber)
 
+	var difficulties = make(map[common.Address]uint64)
+
 	if err != nil {
 		return BlockSigners{}, err
 	}
@@ -101,7 +122,7 @@ func (api *API) GetSnapshotProposerSequence(number *rpc.BlockNumber) (BlockSigne
 
 	rankedDifficulties := rankMapDifficulties(difficulties)
 
-	author, err := api.GetAuthor(number)
+	author, err := api.GetAuthor(blockNrOrHash)
 	if err != nil {
 		return BlockSigners{}, err
 	}
@@ -117,9 +138,31 @@ func (api *API) GetSnapshotProposerSequence(number *rpc.BlockNumber) (BlockSigne
 }
 
 // GetSnapshotProposer retrieves the in-turn signer at a given block.
-func (api *API) GetSnapshotProposer(number *rpc.BlockNumber) (common.Address, error) {
-	*number -= 1
-	snap, err := api.GetSnapshot(number)
+func (api *API) GetSnapshotProposer(blockNrOrHash *rpc.BlockNumberOrHash) (common.Address, error) {
+	var header *types.Header
+	//nolint:nestif
+	if blockNrOrHash == nil {
+		header = api.chain.CurrentHeader()
+	} else {
+		if blockNr, ok := blockNrOrHash.Number(); ok {
+			if blockNr == rpc.LatestBlockNumber {
+				header = api.chain.CurrentHeader()
+			} else {
+				header = api.chain.GetHeaderByNumber(uint64(blockNr))
+			}
+		} else {
+			if blockHash, ok := blockNrOrHash.Hash(); ok {
+				header = api.chain.GetHeaderByHash(blockHash)
+			}
+		}
+	}
+
+	if header == nil {
+		return common.Address{}, errUnknownBlock
+	}
+
+	snapNumber := rpc.BlockNumber(header.Number.Int64() - 1)
+	snap, err := api.GetSnapshot(&snapNumber)
 
 	if err != nil {
 		return common.Address{}, err
@@ -129,14 +172,26 @@ func (api *API) GetSnapshotProposer(number *rpc.BlockNumber) (common.Address, er
 }
 
 // GetAuthor retrieves the author a block.
-func (api *API) GetAuthor(number *rpc.BlockNumber) (*common.Address, error) {
+func (api *API) GetAuthor(blockNrOrHash *rpc.BlockNumberOrHash) (*common.Address, error) {
 	// Retrieve the requested block number (or current if none requested)
 	var header *types.Header
-	if number == nil || *number == rpc.LatestBlockNumber {
+
+	//nolint:nestif
+	if blockNrOrHash == nil {
 		header = api.chain.CurrentHeader()
 	} else {
-		header = api.chain.GetHeaderByNumber(uint64(number.Int64()))
+		if blockNr, ok := blockNrOrHash.Number(); ok {
+			header = api.chain.GetHeaderByNumber(uint64(blockNr))
+			if blockNr == rpc.LatestBlockNumber {
+				header = api.chain.CurrentHeader()
+			}
+		} else {
+			if blockHash, ok := blockNrOrHash.Hash(); ok {
+				header = api.chain.GetHeaderByHash(blockHash)
+			}
+		}
 	}
+
 	// Ensure we have an actually valid block and return its snapshot
 	if header == nil {
 		return nil, errUnknownBlock