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genesis.go
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genesis.go
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package types
import (
"errors"
"fmt"
host "github.com/cosmos/ibc-go/v2/modules/core/24-host"
)
// NewPacketState creates a new PacketState instance.
func NewPacketState(portID, channelID string, seq uint64, data []byte) PacketState {
return PacketState{
PortId: portID,
ChannelId: channelID,
Sequence: seq,
Data: data,
}
}
// Validate performs basic validation of fields returning an error upon any
// failure.
func (pa PacketState) Validate() error {
if pa.Data == nil {
return errors.New("data bytes cannot be nil")
}
return validateGenFields(pa.PortId, pa.ChannelId, pa.Sequence)
}
// NewPacketSequence creates a new PacketSequences instance.
func NewPacketSequence(portID, channelID string, seq uint64) PacketSequence {
return PacketSequence{
PortId: portID,
ChannelId: channelID,
Sequence: seq,
}
}
// Validate performs basic validation of fields returning an error upon any
// failure.
func (ps PacketSequence) Validate() error {
return validateGenFields(ps.PortId, ps.ChannelId, ps.Sequence)
}
// NewGenesisState creates a GenesisState instance.
func NewGenesisState(
channels []IdentifiedChannel, acks, receipts, commitments []PacketState,
sendSeqs, recvSeqs, ackSeqs []PacketSequence, nextChannelSequence uint64,
) GenesisState {
return GenesisState{
Channels: channels,
Acknowledgements: acks,
Commitments: commitments,
SendSequences: sendSeqs,
RecvSequences: recvSeqs,
AckSequences: ackSeqs,
NextChannelSequence: nextChannelSequence,
}
}
// DefaultGenesisState returns the ibc channel submodule's default genesis state.
func DefaultGenesisState() GenesisState {
return GenesisState{
Channels: []IdentifiedChannel{},
Acknowledgements: []PacketState{},
Receipts: []PacketState{},
Commitments: []PacketState{},
SendSequences: []PacketSequence{},
RecvSequences: []PacketSequence{},
AckSequences: []PacketSequence{},
NextChannelSequence: 0,
}
}
// Validate performs basic genesis state validation returning an error upon any
// failure.
func (gs GenesisState) Validate() error {
// keep track of the max sequence to ensure it is less than
// the next sequence used in creating connection identifers.
var maxSequence uint64 = 0
for i, channel := range gs.Channels {
sequence, err := ParseChannelSequence(channel.ChannelId)
if err != nil {
return err
}
if sequence > maxSequence {
maxSequence = sequence
}
if err := channel.ValidateBasic(); err != nil {
return fmt.Errorf("invalid channel %v channel index %d: %w", channel, i, err)
}
}
if maxSequence != 0 && maxSequence >= gs.NextChannelSequence {
return fmt.Errorf("next channel sequence %d must be greater than maximum sequence used in channel identifier %d", gs.NextChannelSequence, maxSequence)
}
for i, ack := range gs.Acknowledgements {
if err := ack.Validate(); err != nil {
return fmt.Errorf("invalid acknowledgement %v ack index %d: %w", ack, i, err)
}
if len(ack.Data) == 0 {
return fmt.Errorf("invalid acknowledgement %v ack index %d: data bytes cannot be empty", ack, i)
}
}
for i, receipt := range gs.Receipts {
if err := receipt.Validate(); err != nil {
return fmt.Errorf("invalid acknowledgement %v ack index %d: %w", receipt, i, err)
}
}
for i, commitment := range gs.Commitments {
if err := commitment.Validate(); err != nil {
return fmt.Errorf("invalid commitment %v index %d: %w", commitment, i, err)
}
if len(commitment.Data) == 0 {
return fmt.Errorf("invalid acknowledgement %v ack index %d: data bytes cannot be empty", commitment, i)
}
}
for i, ss := range gs.SendSequences {
if err := ss.Validate(); err != nil {
return fmt.Errorf("invalid send sequence %v index %d: %w", ss, i, err)
}
}
for i, rs := range gs.RecvSequences {
if err := rs.Validate(); err != nil {
return fmt.Errorf("invalid receive sequence %v index %d: %w", rs, i, err)
}
}
for i, as := range gs.AckSequences {
if err := as.Validate(); err != nil {
return fmt.Errorf("invalid acknowledgement sequence %v index %d: %w", as, i, err)
}
}
return nil
}
func validateGenFields(portID, channelID string, sequence uint64) error {
if err := host.PortIdentifierValidator(portID); err != nil {
return fmt.Errorf("invalid port Id: %w", err)
}
if err := host.ChannelIdentifierValidator(channelID); err != nil {
return fmt.Errorf("invalid channel Id: %w", err)
}
if sequence == 0 {
return errors.New("sequence cannot be 0")
}
return nil
}