bridgevm

package
v1.2.2 Latest Latest
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 Go to latest Published: May 16, 2026 License: BSD-3-Clause Imports: 31 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrMessageNotSigned is returned when a bridge message lacks required signatures
	ErrMessageNotSigned = errors.New("bridge message not signed")

	// ErrInvalidBridgeSignature is returned when signature verification fails
	ErrInvalidBridgeSignature = errors.New("invalid bridge signature")

	// ErrDeliveryNotConfirmed is returned when message delivery is not confirmed
	ErrDeliveryNotConfirmed = errors.New("delivery not confirmed")
)
View Source 
var (
	// ErrInsufficientSigners is returned when there aren't enough active signers
	ErrInsufficientSigners = errors.New("insufficient active signers for threshold")

	// ErrSigningTimeout is returned when signing times out
	ErrSigningTimeout = errors.New("signing timeout")

	// ErrInvalidShare is returned when a signature share is invalid
	ErrInvalidShare = errors.New("invalid signature share")

	// ErrNoKeyShare is returned when the node doesn't have a key share
	ErrNoKeyShare = errors.New("no key share available")
)
View Source 
var Codec codec.Manager
View Source 
var VMID = ids.ID{'b', 'r', 'i', 'd', 'g', 'e', 'v', 'm', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}

VMID is the unique identifier for BridgeVM (B-Chain)

View Source 
var (
	Version = &version.Semantic{
		Major: 1,
		Minor: 0,
		Patch: 0,
	}
)

Functions

This section is empty.

Types

type Block 

type Block struct {
	ParentID_      ids.ID           `json:"parentId"` // Field renamed to avoid method collision
	BlockHeight    uint64           `json:"height"`
	BlockTimestamp int64            `json:"timestamp"`
	BridgeRequests []*BridgeRequest `json:"bridgeRequests"`

	// MPC signatures for this block (NodeID -> signature bytes)
	MPCSignatures map[ids.NodeID][]byte `json:"mpcSignatures"`

	// Cached values
	ID_ ids.ID
	// contains filtered or unexported fields
}

Block represents a block in the Bridge chain

func (*Block) Accept 

func (b *Block) Accept(ctx context.Context) error

Accept marks the block as accepted

func (*Block) Bytes 

func (b *Block) Bytes() []byte

Bytes returns the block bytes

func (*Block) Height 

func (b *Block) Height() uint64

Height returns the block height

func (*Block) ID 

func (b *Block) ID() ids.ID

ID returns the block ID

func (*Block) Parent 

func (b *Block) Parent() ids.ID

Parent returns the parent block (for block.Block interface compatibility)

func (*Block) ParentID 

func (b *Block) ParentID() ids.ID

ParentID returns the parent block ID

func (*Block) Reject 

func (b *Block) Reject(ctx context.Context) error

Reject marks the block as rejected

func (*Block) Status 

func (b *Block) Status() uint8

Status returns the block's status

func (*Block) Timestamp 

func (b *Block) Timestamp() time.Time

Timestamp returns the block timestamp

func (*Block) Verify 

func (b *Block) Verify(ctx context.Context) error

Verify verifies the block

type BridgeConfig 

type BridgeConfig struct {
	// MPC configuration for secure cross-chain operations
	MPCThreshold    int `json:"mpcThreshold"`    // t: Threshold (t+1 parties needed)
	MPCTotalParties int `json:"mpcTotalParties"` // n: Total number of MPC nodes

	// Bridge parameters
	MinConfirmations uint32 `json:"minConfirmations"` // Confirmations required before bridging
	BridgeFee        uint64 `json:"bridgeFee"`        // Fee in LUX for bridge operations

	// Supported chains
	SupportedChains []string `json:"supportedChains"` // Chain IDs that can be bridged

	// Security settings
	MaxBridgeAmount      uint64 `json:"maxBridgeAmount"`      // Maximum amount per bridge transaction
	DailyBridgeLimit     uint64 `json:"dailyBridgeLimit"`     // Daily limit for bridge operations
	RequireValidatorBond uint64 `json:"requireValidatorBond"` // 1M LUX bond required (slashable, NOT staked)

	// LP-333: Opt-in Signer Set Management
	MaxSigners     int     `json:"maxSigners"`     // Maximum signers before set is frozen (default: 100)
	ThresholdRatio float64 `json:"thresholdRatio"` // Threshold as ratio of signers (default: 0.67 = 2/3)
}

BridgeConfig contains VM configuration

type BridgeMessage 

type BridgeMessage struct {
	// Message identification
	ID        ids.ID    `json:"id"`
	Nonce     uint64    `json:"nonce"`
	Timestamp time.Time `json:"timestamp"`

	// Chain routing
	SourceChain string `json:"sourceChain"`
	DestChain   string `json:"destChain"`

	// Asset transfer
	Asset     ids.ID `json:"asset"`
	Amount    uint64 `json:"amount"`
	Recipient []byte `json:"recipient"`
	Sender    []byte `json:"sender"`

	// Source transaction proof
	SourceTxID    ids.ID `json:"sourceTxId"`
	Confirmations uint32 `json:"confirmations"`

	// Threshold signature
	Signature []byte `json:"signature"`
	SignedBy  []int  `json:"signedBy"` // Indices of signers who participated

	// Delivery confirmation
	DeliveryConfirmation *DeliveryConfirmation `json:"deliveryConfirmation,omitempty"`
}

BridgeMessage represents a signed cross-chain message

func (*BridgeMessage) SigningMessage 

func (m *BridgeMessage) SigningMessage() []byte

SigningMessage returns the canonical bytes to sign for a bridge message

func (*BridgeMessage) Verify 

func (m *BridgeMessage) Verify(groupPublicKey []byte, verifier func([]byte, []byte) bool) error

Verify verifies the threshold signature on the message

type BridgeMessageValidator 

type BridgeMessageValidator struct {
	// contains filtered or unexported fields
}

BridgeMessageValidator validates bridge messages and their delivery confirmations

func NewBridgeMessageValidator 

func NewBridgeMessageValidator(
	bridgeSigner *BridgeSigner,
	deliverySigner *DeliveryConfirmationSigner,
	minConfirmations uint32,
	requireDeliveryConfirm bool,
	logger log.Logger,
) *BridgeMessageValidator

NewBridgeMessageValidator creates a new validator

func (*BridgeMessageValidator) ValidateAfterRelay 

func (v *BridgeMessageValidator) ValidateAfterRelay(message *BridgeMessage) error

ValidateAfterRelay validates delivery confirmation after message is relayed

func (*BridgeMessageValidator) ValidateBeforeRelay 

func (v *BridgeMessageValidator) ValidateBeforeRelay(message *BridgeMessage) error

ValidateBeforeRelay validates a message before relaying to destination chain

func (*BridgeMessageValidator) ValidateMessage 

func (v *BridgeMessageValidator) ValidateMessage(message *BridgeMessage) error

ValidateMessage performs full validation of a bridge message

type BridgeRegistry 

type BridgeRegistry struct {
	Validators       map[ids.NodeID]*BridgeValidator
	CompletedBridges map[ids.ID]*CompletedBridge
	DailyVolume      map[string]uint64 // chainID -> volume
	// contains filtered or unexported fields
}

BridgeRegistry tracks bridge operations and validators

type BridgeRequest 

type BridgeRequest struct {
	ID            ids.ID    `json:"id"`
	SourceChain   string    `json:"sourceChain"`
	DestChain     string    `json:"destChain"`
	Asset         ids.ID    `json:"asset"`
	Amount        uint64    `json:"amount"`
	Recipient     []byte    `json:"recipient"`
	SourceTxID    ids.ID    `json:"sourceTxId"`
	Confirmations uint32    `json:"confirmations"`
	Status        string    `json:"status"` // pending, signing, completed, failed
	MPCSignatures [][]byte  `json:"mpcSignatures"`
	CreatedAt     time.Time `json:"createdAt"`
}

BridgeRequest represents a cross-chain bridge request

type BridgeSigner 

type BridgeSigner struct {
	// contains filtered or unexported fields
}

BridgeSigner handles signing of bridge messages using MPC

func NewBridgeSigner 

func NewBridgeSigner(keyManager *MPCKeyManager, coordinator *MPCCoordinator, logger log.Logger) *BridgeSigner

NewBridgeSigner creates a new bridge signer

func (*BridgeSigner) CreateSignatureShare 

func (s *BridgeSigner) CreateSignatureShare(ctx context.Context, message *BridgeMessage) ([]byte, []byte, error)

CreateSignatureShare creates this node's signature share for a bridge message

func (*BridgeSigner) GetSignature 

func (s *BridgeSigner) GetSignature(ctx context.Context, sessionID string) ([]byte, error)

GetSignature retrieves the completed signature for a session

func (*BridgeSigner) RequestSignature 

func (s *BridgeSigner) RequestSignature(ctx context.Context, message *BridgeMessage, signerIndices []int) (string, error)

RequestSignature initiates threshold signing for a bridge message

func (*BridgeSigner) SignBridgeMessage 

func (s *BridgeSigner) SignBridgeMessage(ctx context.Context, message *BridgeMessage, activeSigners []int) error

SignBridgeMessage coordinates complete signing of a bridge message This is used by the coordinator node to orchestrate the signing

func (*BridgeSigner) VerifyBridgeMessage 

func (s *BridgeSigner) VerifyBridgeMessage(message *BridgeMessage) error

VerifyBridgeMessage verifies a bridge message signature

type BridgeValidator 

type BridgeValidator struct {
	NodeID       ids.NodeID
	StakeAmount  uint64
	MPCPublicKey []byte
	Active       bool
	TotalBridged uint64
	SuccessRate  float64
}

BridgeValidator represents a bridge validator node

type ChainClient 

type ChainClient interface {
	GetTransaction(ctx context.Context, txID ids.ID) (interface{}, error)
	GetConfirmations(ctx context.Context, txID ids.ID) (uint32, error)
	SendTransaction(ctx context.Context, tx interface{}) (ids.ID, error)
	ValidateAddress(address []byte) error
}

ChainClient interface for interacting with different chains

type CompletedBridge 

type CompletedBridge struct {
	RequestID    ids.ID
	SourceTxID   ids.ID
	DestTxID     ids.ID
	CompletedAt  time.Time
	MPCSignature []byte
}

CompletedBridge represents a completed bridge operation

type CrossChainMPCRequest 

type CrossChainMPCRequest struct {
	Type          MPCRequestType `json:"type"`
	SessionID     string         `json:"sessionId"`
	Epoch         uint64         `json:"epoch"`
	OldPartyIDs   []party.ID     `json:"oldPartyIds"`
	NewPartyIDs   []party.ID     `json:"newPartyIds"`
	Threshold     int            `json:"threshold"`
	SourceChainID []byte         `json:"sourceChainId"`
	Timestamp     int64          `json:"timestamp"`
}

CrossChainMPCRequest represents a cross-chain request to ThresholdVM for MPC operations

type DeliveryConfirmation 

type DeliveryConfirmation struct {
	DestTxID         ids.ID    `json:"destTxId"`
	DestBlockHeight  uint64    `json:"destBlockHeight"`
	DestConfirms     uint32    `json:"destConfirms"`
	ConfirmedAt      time.Time `json:"confirmedAt"`
	ConfirmSignature []byte    `json:"confirmSignature"` // Threshold signature on delivery
}

DeliveryConfirmation proves message was delivered on destination chain

func (*DeliveryConfirmation) SigningMessage 

func (dc *DeliveryConfirmation) SigningMessage(messageID ids.ID) []byte

SigningMessage returns the canonical bytes to sign for a delivery confirmation

type DeliveryConfirmationSigner 

type DeliveryConfirmationSigner struct {
	// contains filtered or unexported fields
}

DeliveryConfirmationSigner handles signing of delivery confirmations

func NewDeliveryConfirmationSigner 

func NewDeliveryConfirmationSigner(keyManager *MPCKeyManager, coordinator *MPCCoordinator, logger log.Logger) *DeliveryConfirmationSigner

NewDeliveryConfirmationSigner creates a new delivery confirmation signer

func (*DeliveryConfirmationSigner) SignDeliveryConfirmation 

func (s *DeliveryConfirmationSigner) SignDeliveryConfirmation(ctx context.Context, messageID ids.ID, confirmation *DeliveryConfirmation, activeSigners []int) error

SignDeliveryConfirmation creates a threshold signature for delivery confirmation

func (*DeliveryConfirmationSigner) VerifyDeliveryConfirmation 

func (s *DeliveryConfirmationSigner) VerifyDeliveryConfirmation(messageID ids.ID, confirmation *DeliveryConfirmation) error

VerifyDeliveryConfirmation verifies a delivery confirmation signature

type Factory 

type Factory struct{}

Factory creates new BridgeVM instances

func (*Factory) New 

func (f *Factory) New(logger log.Logger) (interface{}, error)

New returns a new instance of the BridgeVM

type Genesis 

type Genesis struct {
	Timestamp int64 `json:"timestamp"`
}

Genesis represents the genesis state

type GetCurrentEpochArgs 

type GetCurrentEpochArgs struct{}

GetCurrentEpochArgs are the arguments for bridge_getCurrentEpoch (empty)

type GetCurrentEpochReply 

type GetCurrentEpochReply struct {
	Epoch        uint64 `json:"epoch"`
	TotalSigners int    `json:"totalSigners"`
	Threshold    int    `json:"threshold"`
	SetFrozen    bool   `json:"setFrozen"`
}

GetCurrentEpochReply is the reply for bridge_getCurrentEpoch

type GetSignerSetInfoArgs 

type GetSignerSetInfoArgs struct{}

GetSignerSetInfoArgs are the arguments for bridge_getSignerSetInfo (empty)

type GetSignerSetInfoReply 

type GetSignerSetInfoReply struct {
	TotalSigners   int               `json:"totalSigners"`
	Threshold      int               `json:"threshold"`
	MaxSigners     int               `json:"maxSigners"`
	CurrentEpoch   uint64            `json:"currentEpoch"`
	SetFrozen      bool              `json:"setFrozen"`
	RemainingSlots int               `json:"remainingSlots"`
	WaitlistSize   int               `json:"waitlistSize"`
	Signers        []SignerInfoReply `json:"signers"`
	PublicKey      string            `json:"publicKey,omitempty"`
}

GetSignerSetInfoReply is the reply for bridge_getSignerSetInfo

type GetWaitlistArgs 

type GetWaitlistArgs struct{}

GetWaitlistArgs are the arguments for bridge_getWaitlist (empty)

type GetWaitlistReply 

type GetWaitlistReply struct {
	WaitlistSize int      `json:"waitlistSize"`
	NodeIDs      []string `json:"nodeIds"`
}

GetWaitlistReply is the reply for bridge_getWaitlist

type HasSignerArgs 

type HasSignerArgs struct {
	NodeID string `json:"nodeId"`
}

HasSignerArgs are the arguments for bridge_hasSigner

type HasSignerReply 

type HasSignerReply struct {
	IsSigner bool `json:"isSigner"`
}

HasSignerReply is the reply for bridge_hasSigner

type MPCCoordinator 

type MPCCoordinator struct {
	// contains filtered or unexported fields
}

MPCCoordinator coordinates threshold signing across multiple parties

func NewMPCCoordinator 

func NewMPCCoordinator(keyManager *MPCKeyManager, logger log.Logger) *MPCCoordinator

NewMPCCoordinator creates a new MPC coordinator

func (*MPCCoordinator) GetSession 

func (c *MPCCoordinator) GetSession(sessionID string) (*SigningSession, bool)

GetSession returns an active signing session

func (*MPCCoordinator) StartSigning 

func (c *MPCCoordinator) StartSigning(ctx context.Context, sessionID string, message []byte, signers []int, timeout time.Duration) (*SigningSession, error)

StartSigning initiates a new signing session

type MPCKeyManager 

type MPCKeyManager struct {
	// contains filtered or unexported fields
}

MPCKeyManager manages threshold key generation and shares

func NewMPCKeyManager 

func NewMPCKeyManager(logger log.Logger) (*MPCKeyManager, error)

NewMPCKeyManager creates a new MPC key manager

func (*MPCKeyManager) AggregateSignature 

func (m *MPCKeyManager) AggregateSignature(ctx context.Context, message []byte, shares []threshold.SignatureShare) ([]byte, error)

AggregateSignature combines signature shares into a final signature

func (*MPCKeyManager) GenerateKeys 

func (m *MPCKeyManager) GenerateKeys(ctx context.Context, t, totalParties int) error

GenerateKeys performs distributed key generation using trusted dealer model In production, this would use proper DKG, but for initial implementation we use trusted dealer for simplicity

func (*MPCKeyManager) GetGroupPublicKey 

func (m *MPCKeyManager) GetGroupPublicKey() []byte

GetGroupPublicKey returns the threshold group public key

func (*MPCKeyManager) GetKeyShareBytes 

func (m *MPCKeyManager) GetKeyShareBytes() []byte

GetKeyShareBytes returns the serialized key share

func (*MPCKeyManager) SetKeyShare 

func (m *MPCKeyManager) SetKeyShare(share threshold.KeyShare) error

SetKeyShare sets this node's key share (used when importing or receiving via DKG)

func (*MPCKeyManager) SignShare 

func (m *MPCKeyManager) SignShare(ctx context.Context, message []byte) (threshold.SignatureShare, error)

SignShare creates a signature share for a message

func (*MPCKeyManager) VerifyShare 

func (m *MPCKeyManager) VerifyShare(message []byte, share threshold.SignatureShare, publicShare []byte) error

VerifyShare verifies a signature share from another signer

func (*MPCKeyManager) VerifySignature 

func (m *MPCKeyManager) VerifySignature(message, signature []byte) bool

VerifySignature verifies a final threshold signature

type MPCRequestType 

type MPCRequestType uint8

MPCRequestType defines the type of MPC cross-chain request 

const (
	// MPCRequestReshare triggers a key reshare protocol
	MPCRequestReshare MPCRequestType = iota
	// MPCRequestSign triggers a threshold signing operation
	MPCRequestSign
	// MPCRequestRefresh triggers a proactive key refresh
	MPCRequestRefresh
)

type RegisterValidatorArgs 

type RegisterValidatorArgs struct {
	NodeID     string `json:"nodeId"`
	BondAmount string `json:"bondAmount,omitempty"` // 100M LUX bond (slashable)
	MPCPubKey  string `json:"mpcPubKey,omitempty"`
}

RegisterValidatorArgs are the arguments for bridge_registerValidator

type RegisterValidatorInput 

type RegisterValidatorInput struct {
	NodeID     string `json:"nodeId"`
	BondAmount string `json:"bondAmount,omitempty"` // 1M LUX bond (slashable)
	MPCPubKey  string `json:"mpcPubKey,omitempty"`
}

RegisterValidatorInput is the input for registering as a bridge signer

type RegisterValidatorReply 

type RegisterValidatorReply struct {
	Success        bool   `json:"success"`
	NodeID         string `json:"nodeId"`
	Registered     bool   `json:"registered"`
	Waitlisted     bool   `json:"waitlisted"`
	SignerIndex    int    `json:"signerIndex"`
	WaitlistIndex  int    `json:"waitlistIndex,omitempty"`
	TotalSigners   int    `json:"totalSigners"`
	Threshold      int    `json:"threshold"`
	ReshareNeeded  bool   `json:"reshareNeeded"`
	CurrentEpoch   uint64 `json:"currentEpoch"`
	SetFrozen      bool   `json:"setFrozen"`
	RemainingSlots int    `json:"remainingSlots"`
	Message        string `json:"message"`
}

RegisterValidatorReply is the reply for bridge_registerValidator

type RegisterValidatorResult 

type RegisterValidatorResult struct {
	Success        bool   `json:"success"`
	NodeID         string `json:"nodeId"`
	Registered     bool   `json:"registered"`
	Waitlisted     bool   `json:"waitlisted"`
	SignerIndex    int    `json:"signerIndex"`
	WaitlistIndex  int    `json:"waitlistIndex,omitempty"`
	TotalSigners   int    `json:"totalSigners"`
	Threshold      int    `json:"threshold"`
	ReshareNeeded  bool   `json:"reshareNeeded"` // Always false for opt-in (LP-333)
	CurrentEpoch   uint64 `json:"currentEpoch"`
	SetFrozen      bool   `json:"setFrozen"`
	RemainingSlots int    `json:"remainingSlots"`
	Message        string `json:"message"`
}

RegisterValidatorResult is the result of registering as a bridge signer

type ReplaceSignerArgs 

type ReplaceSignerArgs struct {
	NodeID            string `json:"nodeId"`            // Signer to remove
	ReplacementNodeID string `json:"replacementNodeId"` // Explicit replacement (optional, uses waitlist if empty)
}

ReplaceSignerArgs are the arguments for bridge_replaceSigner

type ReplaceSignerReply 

type ReplaceSignerReply struct {
	Success           bool   `json:"success"`
	RemovedNodeID     string `json:"removedNodeId,omitempty"`
	ReplacementNodeID string `json:"replacementNodeId,omitempty"`
	ReshareSession    string `json:"reshareSession,omitempty"`
	NewEpoch          uint64 `json:"newEpoch"`
	ActiveSigners     int    `json:"activeSigners"`
	Threshold         int    `json:"threshold"`
	Message           string `json:"message"`
}

ReplaceSignerReply is the reply for bridge_replaceSigner

type Service 

type Service struct {
	// contains filtered or unexported fields
}

Service provides JSON-RPC endpoints for BridgeVM LP-333 signer management

func NewService 

func NewService(vm *VM) *Service

NewService returns a new Service instance

func (*Service) GetCurrentEpoch 

func (s *Service) GetCurrentEpoch(_ *http.Request, _ *GetCurrentEpochArgs, reply *GetCurrentEpochReply) error

GetCurrentEpoch returns the current epoch (incremented only on reshare)

func (*Service) GetSignerSetInfo 

func (s *Service) GetSignerSetInfo(_ *http.Request, _ *GetSignerSetInfoArgs, reply *GetSignerSetInfoReply) error

GetSignerSetInfo returns information about the current signer set (LP-333)

func (*Service) GetWaitlist 

func (s *Service) GetWaitlist(_ *http.Request, _ *GetWaitlistArgs, reply *GetWaitlistReply) error

GetWaitlist returns the current waitlist of validators waiting for signer slots

func (*Service) HasSigner 

func (s *Service) HasSigner(_ *http.Request, args *HasSignerArgs, reply *HasSignerReply) error

HasSigner checks if a node is in the active signer set

func (*Service) RegisterValidator 

func (s *Service) RegisterValidator(_ *http.Request, args *RegisterValidatorArgs, reply *RegisterValidatorReply) error

RegisterValidator registers a validator as a bridge signer (LP-333 opt-in model) First 100 validators are accepted directly without reshare. After 100 signers, new validators go to waitlist.

func (*Service) ReplaceSigner 

func (s *Service) ReplaceSigner(_ *http.Request, args *ReplaceSignerArgs, reply *ReplaceSignerReply) error

ReplaceSigner removes a failed signer and triggers reshare (LP-333) This is the ONLY operation that triggers a reshare.

func (*Service) SlashSigner 

func (s *Service) SlashSigner(_ *http.Request, args *SlashSignerArgs, reply *SlashSignerReply) error

SlashSigner slashes a misbehaving bridge signer's bond The bond is NOT stake - it's a slashable deposit that can be partially or fully seized

type SignerInfo 

type SignerInfo struct {
	NodeID     ids.NodeID `json:"nodeId"`
	PartyID    party.ID   `json:"partyId"`
	BondAmount uint64     `json:"bondAmount"` // 1M LUX bond (slashable, NOT staked)
	MPCPubKey  []byte     `json:"mpcPubKey"`
	Active     bool       `json:"active"`
	JoinedAt   time.Time  `json:"joinedAt"`
	SlotIndex  int        `json:"slotIndex"`
	Slashed    bool       `json:"slashed"`    // True if this signer has been slashed
	SlashCount int        `json:"slashCount"` // Number of times slashed
}

SignerInfo contains information about a signer in the set

type SignerInfoReply 

type SignerInfoReply struct {
	NodeID     string `json:"nodeId"`
	PartyID    string `json:"partyId"`
	BondAmount uint64 `json:"bondAmount"` // 100M LUX bond (slashable)
	Active     bool   `json:"active"`
	JoinedAt   string `json:"joinedAt"`
	SlotIndex  int    `json:"slotIndex"`
	Slashed    bool   `json:"slashed"`
	SlashCount int    `json:"slashCount"`
}

SignerInfoReply contains signer information for RPC replies

type SignerReplacementResult 

type SignerReplacementResult struct {
	Success           bool   `json:"success"`
	RemovedNodeID     string `json:"removedNodeId,omitempty"`
	ReplacementNodeID string `json:"replacementNodeId,omitempty"`
	ReshareSession    string `json:"reshareSession,omitempty"`
	NewEpoch          uint64 `json:"newEpoch"`
	ActiveSigners     int    `json:"activeSigners"`
	Threshold         int    `json:"threshold"`
	Message           string `json:"message"`
}

SignerReplacementResult is the result of replacing a failed signer

type SignerSet 

type SignerSet struct {
	Signers      []*SignerInfo `json:"signers"`      // Active signers (max 100)
	Waitlist     []ids.NodeID  `json:"waitlist"`     // Validators waiting for a slot
	CurrentEpoch uint64        `json:"currentEpoch"` // Increments ONLY on reshare (slot replacement)
	SetFrozen    bool          `json:"setFrozen"`    // True when len(Signers) >= MaxSigners
	ThresholdT   int           `json:"thresholdT"`   // Current t value (T+1 required to sign)
	PublicKey    []byte        `json:"publicKey"`    // Combined threshold public key
}

SignerSet tracks the current MPC signer set (LP-333) First 100 validators opt-in without reshare. Reshare ONLY on slot replacement.

type SignerSetInfo 

type SignerSetInfo struct {
	TotalSigners   int           `json:"totalSigners"`
	Threshold      int           `json:"threshold"`
	MaxSigners     int           `json:"maxSigners"`
	CurrentEpoch   uint64        `json:"currentEpoch"`
	SetFrozen      bool          `json:"setFrozen"`
	RemainingSlots int           `json:"remainingSlots"`
	WaitlistSize   int           `json:"waitlistSize"`
	Signers        []*SignerInfo `json:"signers"`
	PublicKey      string        `json:"publicKey,omitempty"`
}

SignerSetInfo is the result of getting signer set information

type SigningSession 

type SigningSession struct {
	// contains filtered or unexported fields
}

SigningSession manages a distributed signing session

func NewSigningSession 

func NewSigningSession(sessionID string, message []byte, signers []int, timeout time.Duration, logger log.Logger) *SigningSession

NewSigningSession creates a new signing session

func (*SigningSession) AddShare 

func (s *SigningSession) AddShare(signerIndex int, share threshold.SignatureShare, publicShare []byte) error

AddShare adds a signature share to the session

func (*SigningSession) GetShares 

func (s *SigningSession) GetShares() []threshold.SignatureShare

GetShares returns all collected shares

func (*SigningSession) IsComplete 

func (s *SigningSession) IsComplete(threshold int) bool

IsComplete checks if we have enough shares

func (*SigningSession) NumShares 

func (s *SigningSession) NumShares() int

NumShares returns the number of collected shares

func (*SigningSession) SetResult 

func (s *SigningSession) SetResult(signature []byte, err error)

SetResult sets the final signature or error

func (*SigningSession) Wait 

func (s *SigningSession) Wait(ctx context.Context) ([]byte, error)

Wait waits for the session to complete or timeout

type SlashSignerArgs 

type SlashSignerArgs struct {
	NodeID       string `json:"nodeId"`
	Reason       string `json:"reason"`
	SlashPercent int    `json:"slashPercent"` // Percentage of bond to slash (1-100)
	Evidence     string `json:"evidence"`     // Hex-encoded proof of misbehavior
}

SlashSignerArgs are the arguments for bridge_slashSigner

type SlashSignerInput 

type SlashSignerInput struct {
	NodeID       ids.NodeID `json:"nodeId"`
	Reason       string     `json:"reason"`
	SlashPercent int        `json:"slashPercent"` // Percentage of bond to slash (1-100)
	Evidence     []byte     `json:"evidence"`     // Proof of misbehavior
}

SlashSignerInput is the input for slashing a bridge signer

type SlashSignerReply 

type SlashSignerReply struct {
	Success         bool   `json:"success"`
	NodeID          string `json:"nodeId"`
	SlashedAmount   uint64 `json:"slashedAmount"`
	RemainingBond   uint64 `json:"remainingBond"`
	TotalSlashCount int    `json:"totalSlashCount"`
	RemovedFromSet  bool   `json:"removedFromSet"`
	Message         string `json:"message"`
}

SlashSignerReply is the reply for bridge_slashSigner

type SlashSignerResult 

type SlashSignerResult struct {
	Success         bool   `json:"success"`
	NodeID          string `json:"nodeId"`
	SlashedAmount   uint64 `json:"slashedAmount"`
	RemainingBond   uint64 `json:"remainingBond"`
	TotalSlashCount int    `json:"totalSlashCount"`
	RemovedFromSet  bool   `json:"removedFromSet"`
	Message         string `json:"message"`
}

SlashSignerResult is the result of slashing a bridge signer

type VM 

type VM struct {
	// contains filtered or unexported fields
}

VM implements the Bridge VM for cross-chain interoperability

func (*VM) BuildBlock 

func (vm *VM) BuildBlock(ctx context.Context) (chain.Block, error)

BuildBlock implements the chain.ChainVM interface

func (*VM) ConfirmDelivery 

func (vm *VM) ConfirmDelivery(ctx context.Context, message *BridgeMessage, confirmation *DeliveryConfirmation) error

ConfirmDelivery confirms delivery of a bridge message on the destination chain

func (*VM) Connected 

func (vm *VM) Connected(ctx context.Context, nodeID ids.NodeID, nodeVersion *chain.VersionInfo) error

Connected implements the common.VM interface

func (*VM) CreateHandlers 

func (vm *VM) CreateHandlers(ctx context.Context) (map[string]http.Handler, error)

CreateHandlers implements the common.VM interface

func (*VM) CreateRPCHandlers 

func (vm *VM) CreateRPCHandlers() (map[string]http.Handler, error)

CreateRPCHandlers creates HTTP handlers for JSON-RPC endpoints

func (*VM) CreateStaticHandlers 

func (vm *VM) CreateStaticHandlers(ctx context.Context) (map[string]http.Handler, error)

CreateStaticHandlers implements the common.VM interface

func (*VM) CrossChainRequest 

func (vm *VM) CrossChainRequest(ctx context.Context, chainID ids.ID, requestID uint32, deadline time.Time, request []byte) error

CrossChainRequest implements the common.VM interface

func (*VM) CrossChainRequestFailed 

func (vm *VM) CrossChainRequestFailed(ctx context.Context, chainID ids.ID, requestID uint32, appErr *warp.Error) error

CrossChainRequestFailed implements the common.VM interface

func (*VM) CrossChainResponse 

func (vm *VM) CrossChainResponse(ctx context.Context, chainID ids.ID, requestID uint32, response []byte) error

CrossChainResponse implements the common.VM interface

func (*VM) Disconnected 

func (vm *VM) Disconnected(ctx context.Context, nodeID ids.NodeID) error

Disconnected implements the common.VM interface

func (*VM) GetBlock 

func (vm *VM) GetBlock(ctx context.Context, id ids.ID) (chain.Block, error)

GetBlock implements the chain.ChainVM interface

func (*VM) GetBlockIDAtHeight 

func (vm *VM) GetBlockIDAtHeight(ctx context.Context, height uint64) (ids.ID, error)

GetBlockIDAtHeight implements the chain.HeightIndexedChainVM interface

func (*VM) GetMPCStatus 

func (vm *VM) GetMPCStatus() map[string]interface{}

GetMPCStatus returns the current MPC status

func (*VM) GetSignerSetInfo 

func (vm *VM) GetSignerSetInfo() *SignerSetInfo

GetSignerSetInfo returns information about the current signer set

func (*VM) Gossip 

func (vm *VM) Gossip(ctx context.Context, nodeID ids.NodeID, msg []byte) error

Gossip implements the common.VM interface

func (*VM) HandleSignatureShare 

func (vm *VM) HandleSignatureShare(ctx context.Context, sessionID string, signerIndex int, shareBytes, publicShare []byte) error

AddShareToVM adds a VM method to handle incoming signature shares

func (*VM) HasSigner 

func (vm *VM) HasSigner(nodeID ids.NodeID) bool

HasSigner checks if a node ID is in the active signer set

func (*VM) HealthCheck 

func (vm *VM) HealthCheck(ctx context.Context) (chain.HealthResult, error)

HealthCheck implements the common.VM interface

func (*VM) Initialize 

func (vm *VM) Initialize(
	ctx context.Context,
	vmInit vmcore.Init,
) error

Initialize implements the chain.ChainVM interface

func (*VM) InitializeMPCKeys 

func (vm *VM) InitializeMPCKeys(ctx context.Context) error

InitializeMPCKeys performs threshold key generation when signer set is ready This should be called when the signer set reaches the threshold or is frozen

func (*VM) InitiateBridgeTransfer 

func (vm *VM) InitiateBridgeTransfer(ctx context.Context, message *BridgeMessage) error

InitiateBridgeTransfer initiates a new bridge transfer with MPC signing

func (*VM) LastAccepted 

func (vm *VM) LastAccepted(ctx context.Context) (ids.ID, error)

LastAccepted implements the chain.ChainVM interface

func (*VM) NewHTTPHandler 

func (vm *VM) NewHTTPHandler(ctx context.Context) (http.Handler, error)

NewHTTPHandler returns HTTP handlers for the VM

func (*VM) ParseBlock 

func (vm *VM) ParseBlock(ctx context.Context, bytes []byte) (chain.Block, error)

ParseBlock implements the chain.ChainVM interface

func (*VM) ProcessBridgeMessage 

func (vm *VM) ProcessBridgeMessage(ctx context.Context, message *BridgeMessage) error

ProcessBridgeMessage handles an incoming bridge message

func (*VM) RegisterService 

func (vm *VM) RegisterService(server *rpc.Server) error

RegisterService registers the BridgeVM RPC handlers

func (*VM) RegisterValidator 

func (vm *VM) RegisterValidator(input *RegisterValidatorInput) (*RegisterValidatorResult, error)

RegisterValidator registers a new validator as a bridge signer (opt-in model) LP-333: First 100 validators are accepted directly - NO reshare on join. After 100 signers, new validators go to waitlist until a slot opens.

func (*VM) RemoveSigner 

func (vm *VM) RemoveSigner(nodeID ids.NodeID, replacementNodeID *ids.NodeID) (*SignerReplacementResult, error)

RemoveSigner removes a failed/stopped signer and triggers replacement LP-333: This is the ONLY operation that triggers a reshare. Epoch increments only when a signer is replaced.

func (*VM) Request 

func (vm *VM) Request(ctx context.Context, nodeID ids.NodeID, requestID uint32, deadline time.Time, request []byte) error

Request implements the common.VM interface

func (*VM) RequestFailed 

func (vm *VM) RequestFailed(ctx context.Context, nodeID ids.NodeID, requestID uint32, appErr *warp.Error) error

RequestFailed implements the common.VM interface

func (*VM) Response 

func (vm *VM) Response(ctx context.Context, nodeID ids.NodeID, requestID uint32, response []byte) error

Response implements the common.VM interface

func (*VM) SetPreference 

func (vm *VM) SetPreference(ctx context.Context, id ids.ID) error

SetPreference implements the chain.ChainVM interface

func (*VM) SetState 

func (vm *VM) SetState(ctx context.Context, state uint32) error

SetState implements the common.VM interface

func (*VM) Shutdown 

func (vm *VM) Shutdown(ctx context.Context) error

Shutdown implements the common.VM interface

func (*VM) SlashSigner 

func (vm *VM) SlashSigner(input *SlashSignerInput) (*SlashSignerResult, error)

SlashSigner slashes a misbehaving bridge signer's bond The bond is NOT stake - it's a slashable deposit that can be partially or fully seized

func (*VM) TriggerKeygen 

func (vm *VM) TriggerKeygen(ctx context.Context) error

TriggerKeygen should be called when signer set changes

func (*VM) Version 

func (vm *VM) Version(ctx context.Context) (string, error)

Version implements the common.VM interface

func (*VM) WaitForEvent 

func (vm *VM) WaitForEvent(ctx context.Context) (vmcore.Message, error)

WaitForEvent blocks until an event occurs that should trigger block building

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