mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 12:57:18 +00:00
fb8be4d555
* refactor BLS to expose an interface rather than a single implementation * Split up tests, gofmt, goimports, docs * godoc for signature.Copy() * more godocs * revert gomod / deps changes * rm newline * revert proto changes * rename bls12 to herumi for clarity
85 lines
2.7 KiB
Go
85 lines
2.7 KiB
Go
package testutil
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import (
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"context"
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"encoding/binary"
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"math/rand"
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"testing"
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"github.com/pkg/errors"
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ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/state"
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stateTrie "github.com/prysmaticlabs/prysm/beacon-chain/state"
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"github.com/prysmaticlabs/prysm/shared/bls"
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"github.com/prysmaticlabs/prysm/shared/params"
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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 *stateTrie.BeaconState, epoch uint64, 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(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, epoch)
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domain, err := helpers.Domain(beaconState.Fork(), epoch, params.BeaconConfig().DomainRandao, beaconState.GenesisValidatorRoot())
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if err != nil {
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return nil, err
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}
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root, err := helpers.ComputeSigningRoot(epoch, domain)
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if err != nil {
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return nil, errors.Wrap(err, "could not compute signing root of epoch")
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}
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// We make the previous validator's index sign the message instead of the proposer.
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epochSignature := privKeys[proposerIdx].Sign(root[:])
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return epochSignature.Marshal(), nil
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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 *stateTrie.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 := state.CalculateStateRoot(context.Background(), bState, 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 := helpers.Domain(bState.Fork(), helpers.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 := helpers.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(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.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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