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https://gitlab.com/pulsechaincom/prysm-pulse.git
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8219af46e4
* Move slot epoch from core to time pkg * Fix fuzz Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
82 lines
2.9 KiB
Go
82 lines
2.9 KiB
Go
package util
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import (
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"context"
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"encoding/binary"
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"testing"
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"github.com/pkg/errors"
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types "github.com/prysmaticlabs/eth2-types"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/signing"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/time"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/transition"
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"github.com/prysmaticlabs/prysm/beacon-chain/state"
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"github.com/prysmaticlabs/prysm/config/params"
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"github.com/prysmaticlabs/prysm/crypto/bls"
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"github.com/prysmaticlabs/prysm/crypto/rand"
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ethpb "github.com/prysmaticlabs/prysm/proto/prysm/v1alpha1"
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"github.com/prysmaticlabs/prysm/proto/prysm/v1alpha1/wrapper"
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)
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// RandaoReveal returns a signature of the requested epoch using the beacon proposer private key.
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func RandaoReveal(beaconState state.ReadOnlyBeaconState, epoch types.Epoch, privKeys []bls.SecretKey) ([]byte, error) {
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// We fetch the proposer's index as that is whom the RANDAO will be verified against.
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proposerIdx, err := helpers.BeaconProposerIndex(context.Background(), beaconState)
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if err != nil {
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return []byte{}, errors.Wrap(err, "could not get beacon proposer index")
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}
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buf := make([]byte, 32)
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binary.LittleEndian.PutUint64(buf, uint64(epoch))
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// We make the previous validator's index sign the message instead of the proposer.
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sszEpoch := types.SSZUint64(epoch)
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return signing.ComputeDomainAndSign(beaconState, epoch, &sszEpoch, params.BeaconConfig().DomainRandao, privKeys[proposerIdx])
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}
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// BlockSignature calculates the post-state root of the block and returns the signature.
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func BlockSignature(
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bState state.BeaconState,
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block *ethpb.BeaconBlock,
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privKeys []bls.SecretKey,
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) (bls.Signature, error) {
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var err error
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s, err := transition.CalculateStateRoot(context.Background(), bState, wrapper.WrappedPhase0SignedBeaconBlock(ðpb.SignedBeaconBlock{Block: block}))
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if err != nil {
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return nil, err
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}
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block.StateRoot = s[:]
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domain, err := signing.Domain(bState.Fork(), time.CurrentEpoch(bState), params.BeaconConfig().DomainBeaconProposer, bState.GenesisValidatorRoot())
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if err != nil {
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return nil, err
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}
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blockRoot, err := signing.ComputeSigningRoot(block, domain)
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if err != nil {
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return nil, err
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}
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// Temporarily increasing the beacon state slot here since BeaconProposerIndex is a
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// function deterministic on beacon state slot.
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currentSlot := bState.Slot()
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if err := bState.SetSlot(block.Slot); err != nil {
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return nil, err
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}
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proposerIdx, err := helpers.BeaconProposerIndex(context.Background(), bState)
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if err != nil {
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return nil, err
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}
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if err := bState.SetSlot(currentSlot); err != nil {
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return nil, err
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}
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return privKeys[proposerIdx].Sign(blockRoot[:]), nil
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}
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// Random32Bytes generates a random 32 byte slice.
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func Random32Bytes(t *testing.T) []byte {
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b := make([]byte, 32)
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_, err := rand.NewDeterministicGenerator().Read(b)
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if err != nil {
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t.Fatal(err)
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}
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return b
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}
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