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smartcontract: add GetMajorityNodeCount()

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This commit is contained in:
Evgeniy Stratonikov 2021-02-02 12:34:15 +03:00
parent 717be43a5d
commit 7a176727ca
1 changed files with 7 additions and 1 deletions
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8
pkg/smartcontract/contract.go
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@ -49,7 +49,7 @@ func CreateDefaultMultiSigRedeemScript(publicKeys keys.PublicKeys) ([]byte, erro
// using publicKeys length with m set to majority. // using publicKeys length with m set to majority.
func CreateMajorityMultiSigRedeemScript(publicKeys keys.PublicKeys) ([]byte, error) { func CreateMajorityMultiSigRedeemScript(publicKeys keys.PublicKeys) ([]byte, error) {
n := len(publicKeys) n := len(publicKeys)
m := n - (n-1)/2 m := GetMajorityHonestNodeCount(n)
return CreateMultiSigRedeemScript(m, publicKeys) return CreateMultiSigRedeemScript(m, publicKeys)
} }
@ -58,3 +58,9 @@ func CreateMajorityMultiSigRedeemScript(publicKeys keys.PublicKeys) ([]byte, err
func GetDefaultHonestNodeCount(n int) int { func GetDefaultHonestNodeCount(n int) int {
return n - (n-1)/3 return n - (n-1)/3
} }
// GetMajorityHonestNodeCount returns minimum number of honest nodes
// required for majority-style agreement.
func GetMajorityHonestNodeCount(n int) int {
return n - (n-1)/2
}