From 81a11c629a5ec073f9021dc7659719fcce98c85f Mon Sep 17 00:00:00 2001
From: Evgenii Stratonikov <evgeniy@nspcc.ru>
Date: Tue, 22 Sep 2020 12:53:44 +0300
Subject: [PATCH] native: remove `getValidators` method

Follow https://github.com/neo-project/neo/pull/1920 .
---
 pkg/core/blockchain.go        |  2 +-
 pkg/core/native/native_neo.go | 25 ++++++-------------------
 pkg/core/native_neo_test.go   | 10 ++++------
 3 files changed, 11 insertions(+), 26 deletions(-)

diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index 660381f27..ff0505e00 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -1380,7 +1380,7 @@ func (bc *Blockchain) GetCommittee() (keys.PublicKeys, error) {
 
 // GetValidators returns current validators.
 func (bc *Blockchain) GetValidators() ([]*keys.PublicKey, error) {
-	return bc.contracts.NEO.GetValidatorsInternal(bc, bc.dao)
+	return bc.contracts.NEO.ComputeNextBlockValidators(bc, bc.dao)
 }
 
 // GetNextBlockValidators returns next block validators.
diff --git a/pkg/core/native/native_neo.go b/pkg/core/native/native_neo.go
index 88e908985..fd9053782 100644
--- a/pkg/core/native/native_neo.go
+++ b/pkg/core/native/native_neo.go
@@ -132,10 +132,6 @@ func NewNEO() *NEO {
 	md = newMethodAndPrice(n.getCommittee, 100000000, smartcontract.AllowStates)
 	n.AddMethod(md, desc, true)
 
-	desc = newDescriptor("getValidators", smartcontract.ArrayType)
-	md = newMethodAndPrice(n.getValidators, 100000000, smartcontract.AllowStates)
-	n.AddMethod(md, desc, true)
-
 	desc = newDescriptor("getNextBlockValidators", smartcontract.ArrayType)
 	md = newMethodAndPrice(n.getNextBlockValidators, 100000000, smartcontract.AllowStates)
 	n.AddMethod(md, desc, true)
@@ -585,30 +581,21 @@ func (n *NEO) getCandidatesCall(ic *interop.Context, _ []stackitem.Item) stackit
 	return stackitem.NewArray(arr)
 }
 
-// GetValidatorsInternal returns a list of current validators.
-func (n *NEO) GetValidatorsInternal(bc blockchainer.Blockchainer, d dao.DAO) (keys.PublicKeys, error) {
+// ComputeNextBlockValidators returns an actual list of current validators.
+func (n *NEO) ComputeNextBlockValidators(bc blockchainer.Blockchainer, d dao.DAO) (keys.PublicKeys, error) {
 	if vals := n.validators.Load().(keys.PublicKeys); vals != nil {
 		return vals.Copy(), nil
 	}
-	result := n.GetCommitteeMembers()
-	count := bc.GetConfig().ValidatorsCount
-	if len(result) < count {
-		count = len(result)
+	result, err := n.ComputeCommitteeMembers(bc, d)
+	if err != nil {
+		return nil, err
 	}
-	result = result[:count]
+	result = result[:bc.GetConfig().ValidatorsCount]
 	sort.Sort(result)
 	n.validators.Store(result)
 	return result, nil
 }
 
-func (n *NEO) getValidators(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
-	result, err := n.GetValidatorsInternal(ic.Chain, ic.DAO)
-	if err != nil {
-		panic(err)
-	}
-	return pubsToArray(result)
-}
-
 func (n *NEO) getCommittee(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
 	pubs := n.GetCommitteeMembers()
 	sort.Sort(pubs)
diff --git a/pkg/core/native_neo_test.go b/pkg/core/native_neo_test.go
index d4d049370..531119ff5 100644
--- a/pkg/core/native_neo_test.go
+++ b/pkg/core/native_neo_test.go
@@ -37,7 +37,7 @@ func TestNEO_Vote(t *testing.T) {
 
 	standBySorted := bc.GetStandByValidators()
 	sort.Sort(standBySorted)
-	pubs, err := neo.GetValidatorsInternal(bc, ic.DAO)
+	pubs, err := neo.ComputeNextBlockValidators(bc, ic.DAO)
 	require.NoError(t, err)
 	require.Equal(t, standBySorted, pubs)
 
@@ -68,10 +68,8 @@ func TestNEO_Vote(t *testing.T) {
 		require.NoError(t, neo.VoteInternal(ic, h, candidates[i]))
 	}
 
-	require.NoError(t, neo.OnPersist(ic))
-
 	// We still haven't voted enough validators in.
-	pubs, err = neo.GetValidatorsInternal(bc, ic.DAO)
+	pubs, err = neo.ComputeNextBlockValidators(bc, ic.DAO)
 	require.NoError(t, err)
 	require.Equal(t, standBySorted, pubs)
 
@@ -93,7 +91,7 @@ func TestNEO_Vote(t *testing.T) {
 	}
 
 	require.NoError(t, neo.OnPersist(ic))
-	pubs, err = neo.GetValidatorsInternal(bc, ic.DAO)
+	pubs, err = neo.ComputeNextBlockValidators(bc, ic.DAO)
 	require.NoError(t, err)
 	sortedCandidates := candidates.Copy()
 	sort.Sort(sortedCandidates)
@@ -106,7 +104,7 @@ func TestNEO_Vote(t *testing.T) {
 	require.Error(t, neo.VoteInternal(ic, h, candidates[0]))
 	require.NoError(t, neo.OnPersist(ic))
 
-	pubs, err = neo.GetValidatorsInternal(bc, ic.DAO)
+	pubs, err = neo.ComputeNextBlockValidators(bc, ic.DAO)
 	require.NoError(t, err)
 	for i := range pubs {
 		require.NotEqual(t, candidates[0], pubs[i])