1 files changed, 59 insertions, 0 deletions
diff --git a/ledger/ledgercore/validatedBlock.go b/ledger/ledgercore/validatedBlock.go
new file mode 100644
index 000000000..ef6c8f250
--- /dev/null
+++ b/ledger/ledgercore/validatedBlock.go
@@ -0,0 +1,59 @@
+// Copyright (C) 2019-2021 Algorand, Inc.
+// This file is part of go-algorand
+//
+// go-algorand is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// go-algorand is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with go-algorand.  If not, see <https://www.gnu.org/licenses/>.
+
+package ledgercore
+
+import (
+	"github.com/algorand/go-algorand/data/bookkeeping"
+	"github.com/algorand/go-algorand/data/committee"
+)
+
+// ValidatedBlock represents the result of a block validation.  It can
+// be used to efficiently add the block to the ledger, without repeating
+// the work of applying the block's changes to the ledger state.
+type ValidatedBlock struct {
+	blk   bookkeeping.Block
+	delta StateDelta
+}
+
+// Block returns the underlying Block for a ValidatedBlock.
+func (vb ValidatedBlock) Block() bookkeeping.Block {
+	return vb.blk
+}
+
+// Delta returns the underlying Delta for a ValidatedBlock.
+func (vb ValidatedBlock) Delta() StateDelta {
+	return vb.delta
+}
+
+// WithSeed returns a copy of the ValidatedBlock with a modified seed.
+func (vb ValidatedBlock) WithSeed(s committee.Seed) ValidatedBlock {
+	newblock := vb.blk
+	newblock.BlockHeader.Seed = s
+
+	return ValidatedBlock{
+		blk:   newblock,
+		delta: vb.delta,
+	}
+}
+
+// MakeValidatedBlock creates a validated block.
+func MakeValidatedBlock(blk bookkeeping.Block, delta StateDelta) ValidatedBlock {
+	return ValidatedBlock{
+		blk:   blk,
+		delta: delta,
+	}
+}