BeaconDkgValidator
BeaconDkgValidator
This file documents a contract which is not yet deployed to Mainnet.
DKGValidator allows performing a full validation of DKG result, including checking the format of fields in the result, declared selected group members, and signatures of operators supporting the result. The operator submitting the result should perform the validation using a free contract call before submitting the result to ensure their result is valid and can not be challenged. All other network operators should perform validation of the submitted result using a free contract call and challenge the result if the validation fails.
groupSize
uint256 groupSize
Size of a group in the threshold relay.
groupThreshold
uint256 groupThreshold
The minimum number of group members needed to interact according to the protocol to produce a relay entry. The adversary can not learn anything about the key as long as it does not break into groupThreshold+1 of members.
activeThreshold
uint256 activeThreshold
The minimum number of active and properly behaving group members during the DKG needed to accept the result. This number is higher than groupThreshold
to keep a safety margin for members becoming inactive after DKG so that the group can still produce a relay entry.
signatureByteSize
uint256 signatureByteSize
Size in bytes of a single signature produced by operator supporting DKG result.
sortitionPool
contract SortitionPool sortitionPool
constructor
constructor(contract SortitionPool _sortitionPool) public
validate
function validate(struct BeaconDkg.Result result, uint256 seed, uint256 startBlock) external view returns (bool isValid, string errorMsg)
Performs a full validation of DKG result, including checking the format of fields in the result, declared selected group members, and signatures of operators supporting the result.
Parameters
result
struct BeaconDkg.Result
seed
uint256
seed used to start the DKG and select group members
startBlock
uint256
DKG start block
Return Values
isValid
bool
true if the result is valid, false otherwise
errorMsg
string
validation error message; empty for a valid result
validateFields
function validateFields(struct BeaconDkg.Result result) public pure returns (bool isValid, string errorMsg)
Performs a static validation of DKG result fields: lengths, ranges, and order of arrays.
Return Values
isValid
bool
true if the result is valid, false otherwise
errorMsg
string
validation error message; empty for a valid result
validateGroupMembers
function validateGroupMembers(struct BeaconDkg.Result result, uint256 seed) public view returns (bool)
Performs validation of group members as declared in DKG result against group members selected by the sortition pool.
Parameters
result
struct BeaconDkg.Result
seed
uint256
seed used to start the DKG and select group members
Return Values
[0]
bool
true if group members matches; false otherwise
validateSignatures
function validateSignatures(struct BeaconDkg.Result result, uint256 startBlock) public view returns (bool)
Performs validation of signatures supplied in DKG result. Note that this function does not check if addresses which supplied signatures supporting the result are the ones selected to the group by sortition pool. This function should be used together with validateGroupMembers
.
Parameters
result
struct BeaconDkg.Result
startBlock
uint256
DKG start block
Return Values
[0]
bool
true if group members matches; false otherwise
validateMembersHash
function validateMembersHash(struct BeaconDkg.Result result) public pure returns (bool)
Performs validation of hashed group members that actively took part in DKG.
Parameters
result
struct BeaconDkg.Result
DKG result
Return Values
[0]
bool
true if result's group members hash matches with the one that is challenged.
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