127 lines
2.9 KiB
Go
127 lines
2.9 KiB
Go
package lnwire
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
)
|
|
|
|
// Multiple Clearing Requests are possible by putting this inside an array of
|
|
// clearing requests
|
|
type HTLCAddRequest struct {
|
|
// We can use a different data type for this if necessary...
|
|
ChannelID uint64
|
|
|
|
// ID of this request
|
|
HTLCKey HTLCKey
|
|
|
|
// When the HTLC expires
|
|
Expiry uint32
|
|
|
|
// Amount to pay in the hop
|
|
// Difference between hop and first item in blob is the fee to complete
|
|
Amount CreditsAmount
|
|
|
|
// RefundContext is for payment cancellation
|
|
// TODO (j): not currently in use, add later
|
|
RefundContext HTLCKey
|
|
|
|
// Contract Type
|
|
// first 4 bits is n, second for is m, in n-of-m "multisig"
|
|
ContractType uint8
|
|
|
|
// Redemption Hashes
|
|
RedemptionHashes []*[20]byte
|
|
|
|
// Data to parse&pass on to the next node
|
|
// Eventually, we need to make this into a group of 2 nested structs?
|
|
Blob []byte
|
|
}
|
|
|
|
func (c *HTLCAddRequest) Decode(r io.Reader, pver uint32) error {
|
|
// ChannelID(8)
|
|
// HTLCKey(8)
|
|
// Expiry(4)
|
|
// Amount(4)
|
|
// ContractType(1)
|
|
// RedemptionHashes (numOfHashes * 20 + numOfHashes)
|
|
// Blob(2+blobsize)
|
|
err := readElements(r,
|
|
&c.ChannelID,
|
|
&c.HTLCKey,
|
|
&c.Expiry,
|
|
&c.Amount,
|
|
&c.ContractType,
|
|
&c.RedemptionHashes,
|
|
&c.Blob,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Creates a new HTLCAddRequest
|
|
func NewHTLCAddRequest() *HTLCAddRequest {
|
|
return &HTLCAddRequest{}
|
|
}
|
|
|
|
// Serializes the item from the HTLCAddRequest struct
|
|
// Writes the data to w
|
|
func (c *HTLCAddRequest) Encode(w io.Writer, pver uint32) error {
|
|
err := writeElements(w,
|
|
c.ChannelID,
|
|
c.HTLCKey,
|
|
c.Expiry,
|
|
c.Amount,
|
|
c.ContractType,
|
|
c.RedemptionHashes,
|
|
c.Blob,
|
|
)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *HTLCAddRequest) Command() uint32 {
|
|
return CmdHTLCAddRequest
|
|
}
|
|
|
|
func (c *HTLCAddRequest) MaxPayloadLength(uint32) uint32 {
|
|
// base size ~110, but blob can be variable.
|
|
// shouldn't be bigger than 8K though...
|
|
return 8192
|
|
}
|
|
|
|
// Makes sure the struct data is valid (e.g. no negatives or invalid pkscripts)
|
|
func (c *HTLCAddRequest) Validate() error {
|
|
if c.Amount < 0 {
|
|
// While fees can be negative, it's too confusing to allow
|
|
// negative payments. Maybe for some wallets, but not this one!
|
|
return fmt.Errorf("Amount paid cannot be negative.")
|
|
}
|
|
// We're good!
|
|
return nil
|
|
}
|
|
|
|
func (c *HTLCAddRequest) String() string {
|
|
var redemptionHashes string
|
|
for i, rh := range c.RedemptionHashes {
|
|
redemptionHashes += fmt.Sprintf("\n\tSlice\t%d\n", i)
|
|
redemptionHashes += fmt.Sprintf("\t\tRedemption Hash: %x\n", *rh)
|
|
}
|
|
|
|
return fmt.Sprintf("\n--- Begin HTLCAddRequest ---\n") +
|
|
fmt.Sprintf("ChannelID:\t%d\n", c.ChannelID) +
|
|
fmt.Sprintf("HTLCKey:\t%d\n", c.HTLCKey) +
|
|
fmt.Sprintf("Expiry:\t\t%d\n", c.Expiry) +
|
|
fmt.Sprintf("Amount\t\t%d\n", c.Amount) +
|
|
fmt.Sprintf("ContractType:\t%d (%b)\n", c.ContractType, c.ContractType) +
|
|
fmt.Sprintf("RedemptionHashes:") +
|
|
redemptionHashes +
|
|
fmt.Sprintf("Blob:\t\t\t\t%x\n", c.Blob) +
|
|
fmt.Sprintf("--- End HTLCAddRequest ---\n")
|
|
}
|