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Merge pull request #143 from apotdevin/ln-url
chore: 🔧 ln-url
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,243 @@ | ||
| import { randomBytes } from 'crypto'; | ||
| import { to } from 'server/helpers/async'; | ||
| import { logger } from 'server/helpers/logger'; | ||
| import { requestLimiter } from 'server/helpers/rateLimiter'; | ||
| import { ContextType } from 'server/types/apiTypes'; | ||
| import { createInvoice, decodePaymentRequest, pay } from 'ln-service'; | ||
| import { | ||
| CreateInvoiceType, | ||
| DecodedType, | ||
| PayInvoiceType, | ||
| } from 'server/types/ln-service.types'; | ||
| // import { GetPublicKeyType } from 'server/types/ln-service.types'; | ||
| // import hmacSHA256 from 'crypto-js/hmac-sha256'; | ||
|
|
||
| type LnUrlPayResponseType = { | ||
| pr?: string; | ||
| successAction?: { tag: string }; | ||
| status?: string; | ||
| reason?: string; | ||
| }; | ||
|
|
||
| type LnUrlParams = { | ||
| type: string; | ||
| url: string; | ||
| }; | ||
|
|
||
| type FetchLnUrlParams = { | ||
| url: string; | ||
| }; | ||
|
|
||
| type LnUrlPayType = { callback: string; amount: number; comment: string }; | ||
| type LnUrlWithdrawType = { | ||
| callback: string; | ||
| k1: string; | ||
| amount: number; | ||
| description: string; | ||
| }; | ||
|
|
||
| type PayRequestType = { | ||
| callback: string; | ||
| maxSendable: string; | ||
| minSendable: string; | ||
| metadata: string; | ||
| commentAllowed: number; | ||
| tag: string; | ||
| }; | ||
|
|
||
| type WithdrawRequestType = { | ||
| callback: string; | ||
| k1: string; | ||
| maxWithdrawable: string; | ||
| defaultDescription: string; | ||
| minWithdrawable: string; | ||
| tag: string; | ||
| }; | ||
|
|
||
| type RequestType = PayRequestType | WithdrawRequestType; | ||
| type RequestWithType = { isTypeOf: string } & RequestType; | ||
|
|
||
| export const lnUrlResolvers = { | ||
| Mutation: { | ||
| lnUrl: async ( | ||
| _: undefined, | ||
| { type, url }: LnUrlParams, | ||
| context: ContextType | ||
| ): Promise<string> => { | ||
| await requestLimiter(context.ip, 'lnUrl'); | ||
|
|
||
| // const fullUrl = new URL(url); | ||
|
|
||
| // const { lnd } = context; | ||
|
|
||
| // if (type === 'login') { | ||
| // logger.debug({ type, url }); | ||
|
|
||
| // const info = await to<GetPublicKeyType>( | ||
| // getPublicKey({ lnd, family: 138, index: 0 }) | ||
| // ); | ||
|
|
||
| // const hashed = hmacSHA256(fullUrl.host, info.public_key); | ||
|
|
||
| // return info.public_key; | ||
| // } | ||
|
|
||
| logger.debug({ type, url }); | ||
|
|
||
| return 'confirmed'; | ||
| }, | ||
| fetchLnUrl: async ( | ||
| _: undefined, | ||
| { url }: FetchLnUrlParams, | ||
| context: ContextType | ||
| ) => { | ||
| await requestLimiter(context.ip, 'fetchLnUrl'); | ||
|
|
||
| try { | ||
| const response = await fetch(url); | ||
| const json = await response.json(); | ||
|
|
||
| if (json.status === 'ERROR') { | ||
| throw new Error(json.reason || 'LnServiceError'); | ||
| } | ||
|
|
||
| return json; | ||
| } catch (error) { | ||
| logger.error('Error fetching from LnUrl service: %o', error); | ||
| throw new Error('ProblemFetchingFromLnUrlService'); | ||
| } | ||
| }, | ||
| lnUrlPay: async ( | ||
| _: undefined, | ||
| { callback, amount, comment }: LnUrlPayType, | ||
| context: ContextType | ||
| ) => { | ||
| await requestLimiter(context.ip, 'lnUrlPay'); | ||
| const { lnd } = context; | ||
|
|
||
| logger.debug('LnUrlPay initiated with params %o', { | ||
| callback, | ||
| amount, | ||
| comment, | ||
| }); | ||
|
|
||
| const random8byteNonce = randomBytes(8).toString('hex'); | ||
|
|
||
| const finalUrl = `${callback}?amount=${ | ||
| amount * 1000 | ||
| }&nonce=${random8byteNonce}&comment=${comment}`; | ||
|
|
||
| let lnServiceResponse: LnUrlPayResponseType = { | ||
| status: 'ERROR', | ||
| reason: 'FailedToFetchLnService', | ||
| }; | ||
|
|
||
| try { | ||
| const response = await fetch(finalUrl); | ||
| lnServiceResponse = await response.json(); | ||
|
|
||
| if (lnServiceResponse.status === 'ERROR') { | ||
| throw new Error(lnServiceResponse.reason || 'LnServiceError'); | ||
| } | ||
| } catch (error) { | ||
| logger.error('Error paying to LnUrl service: %o', error); | ||
| throw new Error('ProblemPayingLnUrlService'); | ||
| } | ||
|
|
||
| logger.debug('LnUrlPay response: %o', lnServiceResponse); | ||
|
|
||
| if (!lnServiceResponse.pr) { | ||
| logger.error('No invoice in response from LnUrlService'); | ||
| throw new Error('ProblemPayingLnUrlService'); | ||
| } | ||
|
|
||
| if (lnServiceResponse.successAction) { | ||
| const { tag } = lnServiceResponse.successAction; | ||
| if (tag !== 'url' && tag !== 'message' && tag !== 'aes') { | ||
| logger.error('LnUrlService provided an invalid tag: %o', tag); | ||
| throw new Error('InvalidTagFromLnUrlService'); | ||
| } | ||
| } | ||
|
|
||
| const decoded = await to<DecodedType>( | ||
| decodePaymentRequest({ | ||
| lnd, | ||
| request: lnServiceResponse.pr, | ||
| }) | ||
| ); | ||
|
|
||
| if (decoded.tokens > amount) { | ||
| logger.error( | ||
| `Invoice amount ${decoded.tokens} is higher than amount defined ${amount}` | ||
| ); | ||
| throw new Error('LnServiceInvoiceAmountToHigh'); | ||
| } | ||
|
|
||
| const info = await to<PayInvoiceType>( | ||
| pay({ lnd, request: lnServiceResponse.pr }) | ||
| ); | ||
|
|
||
| if (!info.is_confirmed) { | ||
| logger.error(`Failed to pay invoice: ${lnServiceResponse.pr}`); | ||
| throw new Error('FailedToPayInvoiceToLnUrlService'); | ||
| } | ||
|
|
||
| return ( | ||
| lnServiceResponse.successAction || { | ||
| tag: 'message', | ||
| message: 'Succesfully Paid', | ||
| } | ||
| ); | ||
| }, | ||
| lnUrlWithdraw: async ( | ||
| _: undefined, | ||
| { callback, k1, amount, description }: LnUrlWithdrawType, | ||
| context: ContextType | ||
| ) => { | ||
| await requestLimiter(context.ip, 'lnUrlWithdraw'); | ||
| const { lnd } = context; | ||
|
|
||
| logger.debug('LnUrlWithdraw initiated with params: %o', { | ||
| callback, | ||
| amount, | ||
| k1, | ||
| description, | ||
| }); | ||
|
|
||
| // Create invoice to be paid by LnUrlService | ||
| const info = await to<CreateInvoiceType>( | ||
| createInvoice({ lnd, tokens: amount, description }) | ||
| ); | ||
|
|
||
| const finalUrl = `${callback}?k1=${k1}&pr=${info.request}`; | ||
|
|
||
| try { | ||
| const response = await fetch(finalUrl); | ||
| const json = await response.json(); | ||
|
|
||
| logger.debug('LnUrlWithdraw response: %o', json); | ||
|
|
||
| if (json.status === 'ERROR') { | ||
| throw new Error(json.reason || 'LnServiceError'); | ||
| } | ||
|
|
||
| // Return invoice id to check status | ||
| return info.id; | ||
| } catch (error) { | ||
| logger.error('Error withdrawing from LnUrl service: %o', error); | ||
| throw new Error('ProblemWithdrawingFromLnUrlService'); | ||
| } | ||
| }, | ||
| }, | ||
| LnUrlRequest: { | ||
| __resolveType(parent: RequestWithType) { | ||
| if (parent.tag === 'payRequest') { | ||
| return 'PayRequest'; | ||
| } | ||
| if (parent.tag === 'withdrawRequest') { | ||
| return 'WithdrawRequest'; | ||
| } | ||
| return 'Unknown'; | ||
| }, | ||
| }, | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| import { gql } from '@apollo/client'; | ||
|
|
||
| export const lnUrlTypes = gql` | ||
| type WithdrawRequest { | ||
| callback: String | ||
| k1: String | ||
| maxWithdrawable: String | ||
| defaultDescription: String | ||
| minWithdrawable: String | ||
| tag: String | ||
| } | ||
| type PayRequest { | ||
| callback: String | ||
| maxSendable: String | ||
| minSendable: String | ||
| metadata: String | ||
| commentAllowed: Int | ||
| tag: String | ||
| } | ||
| union LnUrlRequest = WithdrawRequest | PayRequest | ||
| type PaySuccess { | ||
| tag: String | ||
| description: String | ||
| url: String | ||
| message: String | ||
| ciphertext: String | ||
| iv: String | ||
| } | ||
| `; |
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