-
Notifications
You must be signed in to change notification settings - Fork 2.1k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge branch 'master' into blockBasedGracePeriod
- Loading branch information
Showing
24 changed files
with
2,477 additions
and
94 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| package invoice | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strconv" | ||
|
|
||
| "github.com/lightningnetwork/lnd/lnwire" | ||
| ) | ||
|
|
||
| var ( | ||
| // toMSat is a map from a unit to a function that converts an amount | ||
| // of that unit to millisatoshis. | ||
| toMSat = map[byte]func(uint64) (lnwire.MilliSatoshi, error){ | ||
| 'm': mBtcToMSat, | ||
| 'u': uBtcToMSat, | ||
| 'n': nBtcToMSat, | ||
| 'p': pBtcToMSat, | ||
| } | ||
|
|
||
| // fromMSat is a map from a unit to a function that converts an amount | ||
| // in millisatoshis to an amount of that unit. | ||
| fromMSat = map[byte]func(lnwire.MilliSatoshi) (uint64, error){ | ||
| 'm': mSatToMBtc, | ||
| 'u': mSatToUBtc, | ||
| 'n': mSatToNBtc, | ||
| 'p': mSatToPBtc, | ||
| } | ||
| ) | ||
|
|
||
| // mBtcToMSat converts the given amount in milliBTC to millisatoshis. | ||
| func mBtcToMSat(m uint64) (lnwire.MilliSatoshi, error) { | ||
| return lnwire.MilliSatoshi(m) * 100000000, nil | ||
| } | ||
|
|
||
| // uBtcToMSat converts the given amount in microBTC to millisatoshis. | ||
| func uBtcToMSat(u uint64) (lnwire.MilliSatoshi, error) { | ||
| return lnwire.MilliSatoshi(u * 100000), nil | ||
| } | ||
|
|
||
| // nBtcToMSat converts the given amount in nanoBTC to millisatoshis. | ||
| func nBtcToMSat(n uint64) (lnwire.MilliSatoshi, error) { | ||
| return lnwire.MilliSatoshi(n * 100), nil | ||
| } | ||
|
|
||
| // pBtcToMSat converts the given amount in picoBTC to millisatoshis. | ||
| func pBtcToMSat(p uint64) (lnwire.MilliSatoshi, error) { | ||
| if p < 10 { | ||
| return 0, fmt.Errorf("minimum amount is 10p") | ||
| } | ||
| if p%10 != 0 { | ||
| return 0, fmt.Errorf("amount %d pBTC not expressible in msat", | ||
| p) | ||
| } | ||
| return lnwire.MilliSatoshi(p / 10), nil | ||
| } | ||
|
|
||
| // mSatToMBtc converts the given amount in millisatoshis to milliBTC. | ||
| func mSatToMBtc(msat lnwire.MilliSatoshi) (uint64, error) { | ||
| if msat%100000000 != 0 { | ||
| return 0, fmt.Errorf("%d msat not expressible "+ | ||
| "in mBTC", msat) | ||
| } | ||
| return uint64(msat / 100000000), nil | ||
| } | ||
|
|
||
| // mSatToUBtc converts the given amount in millisatoshis to microBTC. | ||
| func mSatToUBtc(msat lnwire.MilliSatoshi) (uint64, error) { | ||
| if msat%100000 != 0 { | ||
| return 0, fmt.Errorf("%d msat not expressible "+ | ||
| "in uBTC", msat) | ||
| } | ||
| return uint64(msat / 100000), nil | ||
| } | ||
|
|
||
| // mSatToNBtc converts the given amount in millisatoshis to nanoBTC. | ||
| func mSatToNBtc(msat lnwire.MilliSatoshi) (uint64, error) { | ||
| if msat%100 != 0 { | ||
| return 0, fmt.Errorf("%d msat not expressible in nBTC", msat) | ||
| } | ||
| return uint64(msat / 100), nil | ||
| } | ||
|
|
||
| // mSatToPBtc converts the given amount in milllisatoshis to picoBTC. | ||
| func mSatToPBtc(msat lnwire.MilliSatoshi) (uint64, error) { | ||
| return uint64(msat * 10), nil | ||
| } | ||
|
|
||
| // decodeAmount returns the amount encoded by the provided string in | ||
| // milllisatoshi. | ||
| func decodeAmount(amount string) (lnwire.MilliSatoshi, error) { | ||
| if len(amount) < 1 { | ||
| return 0, fmt.Errorf("amount must be non-empty") | ||
| } | ||
|
|
||
| // If last character is a digit, then the amount can just be | ||
| // interpreted as BTC. | ||
| char := amount[len(amount)-1] | ||
| digit := char - '0' | ||
| if digit >= 0 && digit <= 9 { | ||
| btc, err := strconv.ParseUint(amount, 10, 64) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| return lnwire.MilliSatoshi(btc) * mSatPerBtc, nil | ||
| } | ||
|
|
||
| // If not a digit, it must be part of the known units. | ||
| conv, ok := toMSat[char] | ||
| if !ok { | ||
| return 0, fmt.Errorf("unknown multiplier %c", char) | ||
| } | ||
|
|
||
| // Known unit. | ||
| num := amount[:len(amount)-1] | ||
| if len(num) < 1 { | ||
| return 0, fmt.Errorf("number must be non-empty") | ||
| } | ||
|
|
||
| am, err := strconv.ParseUint(num, 10, 64) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| return conv(am) | ||
| } | ||
|
|
||
| // encodeAmount encodes the provided millisatoshi amount using as few characters | ||
| // as possible. | ||
| func encodeAmount(msat lnwire.MilliSatoshi) (string, error) { | ||
| // If possible to express in BTC, that will always be the shortest | ||
| // representation. | ||
| if msat%mSatPerBtc == 0 { | ||
| return strconv.FormatInt(int64(msat/mSatPerBtc), 10), nil | ||
| } | ||
|
|
||
| // Should always be expressible in pico BTC. | ||
| pico, err := fromMSat['p'](msat) | ||
| if err != nil { | ||
| return "", fmt.Errorf("unable to express %d msat as pBTC: %v", | ||
| msat, err) | ||
| } | ||
| shortened := strconv.FormatUint(pico, 10) + "p" | ||
| for unit, conv := range fromMSat { | ||
| am, err := conv(msat) | ||
| if err != nil { | ||
| // Not expressible using this unit. | ||
| continue | ||
| } | ||
|
|
||
| // Save the shortest found representation. | ||
| str := strconv.FormatUint(am, 10) + string(unit) | ||
| if len(str) < len(shortened) { | ||
| shortened = str | ||
| } | ||
| } | ||
|
|
||
| return shortened, nil | ||
| } |
Oops, something went wrong.