135 lines
3.2 KiB
Go
135 lines
3.2 KiB
Go
package lnwire
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import (
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"fmt"
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"github.com/roasbeef/btcd/btcec"
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"github.com/roasbeef/btcd/wire"
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"github.com/roasbeef/btcutil"
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"io"
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)
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type FundingResponse struct {
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ChannelID uint64
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RevocationHash [20]byte
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Pubkey *btcec.PublicKey
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CommitSig *btcec.Signature // Requester's Commitment
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DeliveryPkScript PkScript // *MUST* be either P2PKH or P2SH
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ChangePkScript PkScript // *MUST* be either P2PKH or P2SH
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}
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func (c *FundingResponse) Decode(r io.Reader, pver uint32) error {
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// ChannelID (8)
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// Revocation Hash (20)
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// Pubkey (32)
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// CommitSig (73)
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// DeliveryPkScript (final delivery)
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// ChangePkScript (change for extra from inputs)
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err := readElements(r,
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&c.ChannelID,
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&c.RevocationHash,
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&c.Pubkey,
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&c.CommitSig,
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&c.DeliveryPkScript,
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&c.ChangePkScript)
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if err != nil {
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return err
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}
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return nil
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}
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// Creates a new FundingResponse
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func NewFundingResponse() *FundingResponse {
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return &FundingResponse{}
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}
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// Serializes the item from the FundingResponse struct
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// Writes the data to w
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func (c *FundingResponse) Encode(w io.Writer, pver uint32) error {
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// ChannelID (8)
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// Revocation Hash (20)
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// Pubkey (32)
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// CommitSig (73)
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// DeliveryPkScript (final delivery)
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// ChangePkScript (change for extra from inputs)
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err := writeElements(w,
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c.ChannelID,
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c.RevocationHash,
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c.Pubkey,
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c.CommitSig,
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c.DeliveryPkScript,
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c.ChangePkScript)
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if err != nil {
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return err
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}
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return nil
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}
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func (c *FundingResponse) Command() uint32 {
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return CmdFundingResponse
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}
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func (c *FundingResponse) MaxPayloadLength(uint32) uint32 {
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return 186
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}
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// Makes sure the struct data is valid (e.g. no negatives or invalid pkscripts)
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func (c *FundingResponse) Validate() error {
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var err error
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// No negative values
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if c.ResponderFundingAmount < 0 {
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return fmt.Errorf("ResponderFundingAmount cannot be negative")
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}
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if c.ResponderReserveAmount < 0 {
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return fmt.Errorf("ResponderReserveAmount cannot be negative")
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}
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if c.MinFeePerKb < 0 {
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return fmt.Errorf("MinFeePerKb cannot be negative")
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}
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// Validation of what makes sense...
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if c.ResponderFundingAmount < c.ResponderReserveAmount {
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return fmt.Errorf("Reserve must be below Funding Amount")
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}
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// Make sure there's not more than 127 inputs
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if len(c.Inputs) > 127 {
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return fmt.Errorf("Too many inputs")
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}
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// Delivery PkScript is either P2SH or P2PKH
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err = ValidatePkScript(c.DeliveryPkScript)
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if err != nil {
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return err
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}
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// Change PkScript is either P2SH or P2PKH
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err = ValidatePkScript(c.ChangePkScript)
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if err != nil {
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return err
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}
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// We're good!
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return nil
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}
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func (c *FundingResponse) String() string {
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var serializedPubkey []byte
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if &c.Pubkey != nil && c.Pubkey.X != nil {
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serializedPubkey = c.Pubkey.SerializeCompressed()
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}
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return fmt.Sprintf("\n--- Begin FundingResponse ---\n") +
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fmt.Sprintf("ChannelID:\t\t\t%d\n", c.ChannelID) +
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fmt.Sprintf("RevocationHash\t\t\t%x\n", c.RevocationHash) +
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fmt.Sprintf("Pubkey\t\t\t\t%x\n", serializedPubkey) +
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fmt.Sprintf("CommitSig\t\t\t%x\n", c.CommitSig.Serialize()) +
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fmt.Sprintf("DeliveryPkScript\t\t%x\n", c.DeliveryPkScript) +
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fmt.Sprintf("ChangePkScript\t\t%x\n", c.ChangePkScript) +
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fmt.Sprintf("--- End FundingResponse ---\n")
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}
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