From 19fd7f844ebc230431b115f9b6fc57bc562855ff Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Fri, 11 Oct 2019 14:16:53 +0300
Subject: [PATCH] core: add GetUnspentCoinState() for future interops

---
 pkg/core/blockchain.go     | 9 +++++++++
 pkg/core/blockchainer.go   | 1 +
 pkg/network/helper_test.go | 4 ++++
 3 files changed, 14 insertions(+)

diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index d8051e9c0..ac37762ba 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -740,6 +740,15 @@ func (bc *Blockchain) GetAccountState(scriptHash util.Uint160) *AccountState {
 	return as
 }
 
+// GetUnspentCoinState returns unspent coin state for given tx hash.
+func (bc *Blockchain) GetUnspentCoinState(hash util.Uint256) *UnspentCoinState {
+	ucs, err := getUnspentCoinStateFromStore(bc.memStore, hash)
+	if err != nil {
+		ucs, _ = getUnspentCoinStateFromStore(bc.Store, hash)
+	}
+	return ucs
+}
+
 // GetConfig returns the config stored in the blockchain
 func (bc *Blockchain) GetConfig() config.ProtocolConfiguration {
 	return bc.config
diff --git a/pkg/core/blockchainer.go b/pkg/core/blockchainer.go
index 85724a4cd..7038617b1 100644
--- a/pkg/core/blockchainer.go
+++ b/pkg/core/blockchainer.go
@@ -26,6 +26,7 @@ type Blockchainer interface {
 	GetStorageItem(scripthash util.Uint160, key []byte) *StorageItem
 	GetStorageItems(hash util.Uint160) (map[string]*StorageItem, error)
 	GetTransaction(util.Uint256) (*transaction.Transaction, uint32, error)
+	GetUnspentCoinState(util.Uint256) *UnspentCoinState
 	References(t *transaction.Transaction) map[transaction.Input]*transaction.Output
 	Feer // fee interface
 	Verify(t *transaction.Transaction) error
diff --git a/pkg/network/helper_test.go b/pkg/network/helper_test.go
index 0aeec48d9..1b851b226 100644
--- a/pkg/network/helper_test.go
+++ b/pkg/network/helper_test.go
@@ -91,6 +91,10 @@ func (chain testChain) GetTransaction(util.Uint256) (*transaction.Transaction, u
 	panic("TODO")
 }
 
+func (chain testChain) GetUnspentCoinState(util.Uint256) *core.UnspentCoinState {
+	panic("TODO")
+}
+
 func (chain testChain) GetMemPool() core.MemPool {
 	panic("TODO")
 }