From 58119e606583e8a29ecac16da34cdc176dc7b6c8 Mon Sep 17 00:00:00 2001 From: Alex Vanin Date: Thu, 25 Mar 2021 21:13:05 +0300 Subject: [PATCH] [#421] governance: Don't construct alphabet list with empty sidechain Signed-off-by: Alex Vanin --- pkg/innerring/processors/governance/list.go | 16 +++++++++++----- pkg/innerring/processors/governance/list_test.go | 5 +++++ 2 files changed, 16 insertions(+), 5 deletions(-) diff --git a/pkg/innerring/processors/governance/list.go b/pkg/innerring/processors/governance/list.go index f5e21d753c..a181c5969c 100644 --- a/pkg/innerring/processors/governance/list.go +++ b/pkg/innerring/processors/governance/list.go @@ -8,16 +8,22 @@ import ( ) var ( - errNotEnoughKeys = errors.New("alphabet list in mainnet is too short") - errNotEqualLen = errors.New("old and new alphabet lists have different length") + errNotEnoughKeys = errors.New("alphabet list in mainnet is too short") + errNotEqualLen = errors.New("old and new alphabet lists have different length") + errEmptySidechain = errors.New("sidechain list is empty") ) // newAlphabetList returns updated list of sidechain keys with no more than 1\3 -// of new keys from mainnet list. Function returns `errNotEnoughKeys` if -// mainnet list contains less keys than sidechain list. Function returns -// (nil, nil) if mainnet list contains all keys from sidechain list. +// of new keys from mainnet list. Function returns `errEmptySidechain` if +// sidechain list is empty. Function returns `errNotEnoughKeys` if mainnet +// list contains less keys than sidechain list. Function returns (nil, nil) if +// mainnet list contains all keys from sidechain list. func newAlphabetList(sidechain, mainnet keys.PublicKeys) (keys.PublicKeys, error) { ln := len(sidechain) + if ln == 0 { + return nil, errEmptySidechain + } + if len(mainnet) < ln { return nil, errors.Wrapf(errNotEnoughKeys, "expecting %d keys", ln) } diff --git a/pkg/innerring/processors/governance/list_test.go b/pkg/innerring/processors/governance/list_test.go index 8cc64cd0e8..2b67e0bed8 100644 --- a/pkg/innerring/processors/governance/list_test.go +++ b/pkg/innerring/processors/governance/list_test.go @@ -14,6 +14,11 @@ func TestNewAlphabetList(t *testing.T) { orig := keys.PublicKeys{k[0], k[1], k[2], k[3], k[4], k[5], k[6]} + t.Run("no sidechain keys", func(t *testing.T) { + _, err := newAlphabetList(nil, orig) + require.Error(t, err) + }) + t.Run("same keys", func(t *testing.T) { list, err := newAlphabetList(orig, orig) require.NoError(t, err)