attempts at serializable transactions

api/resolvers/item.js

@@ -1,4 +1,5 @@
 import { UserInputError, AuthenticationError } from 'apollo-server-micro'
+import serialize from './serial'
 
 async function comments (models, id) {
   const flat = await models.$queryRaw(`
@@ -106,15 +107,7 @@ export default {
         throw new UserInputError('sats must be positive', { argumentName: 'sats' })
       }
 
-      try {
+      await serialize(models, models.$queryRaw`SELECT vote(${Number(id)}, ${me.name}, ${Number(sats)})`)
-        await models.$queryRaw`SELECT vote(${Number(id)}, ${me.name}, ${Number(sats)})`
-      } catch (error) {
-        const { meta: { message } } = error
-        if (message.includes('SN_INSUFFICIENT_FUNDS')) {
-          throw new UserInputError('insufficient funds')
-        }
-        throw error
-      }
       return sats
     }
   },
@@ -178,19 +171,11 @@ const createItem = async (parent, { title, url, text, parentId }, { me, models }
     throw new AuthenticationError('you must be logged in')
   }
 
-  try {
+  const [item] = await serialize(models, models.$queryRaw(
-    const [item] = await models.$queryRaw(
     `${SELECT} FROM create_item($1, $2, $3, $4, $5) AS "Item"`,
-      title, url, text, Number(parentId), me.name)
+    title, url, text, Number(parentId), me.name))
   item.comments = []
   return item
-  } catch (error) {
-    const { meta: { message } } = error
-    if (message.includes('SN_INSUFFICIENT_FUNDS')) {
-      throw new UserInputError('insufficient funds')
-    }
-    throw error
-  }
 }
 
 function nestComments (flat, parentId) {

api/resolvers/serial.js

@@ -0,0 +1,24 @@
+const { UserInputError } = require('apollo-server-micro')
+
+async function serialize (models, call) {
+  try {
+    const [, result] = await models.$transaction([
+      models.$executeRaw(SERIALIZE),
+      call
+    ])
+    return result
+  } catch (error) {
+    console.log(error)
+    if (error.message.includes('SN_INSUFFICIENT_FUNDS')) {
+      throw new UserInputError('insufficient funds')
+    }
+    if (error.message.includes('SN_NOT_SERIALIZABLE')) {
+      throw new Error('wallet transaction isolation level is not serializable')
+    }
+    throw error
+  }
+}
+
+const SERIALIZE = 'SET TRANSACTION ISOLATION LEVEL SERIALIZABLE'
+
+module.exports = serialize

api/resolvers/wallet.js

@@ -1,24 +1,59 @@
 import { createInvoice, decodePaymentRequest, subscribeToPayViaRequest } from 'ln-service'
 import { UserInputError, AuthenticationError } from 'apollo-server-micro'
+import serialize from './serial'
 
 export default {
   Query: {
     invoice: async (parent, { id }, { me, models, lnd }) => {
-      return await models.invoice.findUnique({ where: { id: Number(id) } })
+      if (!me) {
+        throw new AuthenticationError('you must be logged in')
+      }
+
+      const inv = await models.invoice.findUnique({
+        where: {
+          id: Number(id)
+        },
+        include: {
+          user: true
+        }
+      })
+
+      if (inv.user.name !== me.name) {
+        throw new AuthenticationError('not ur invoice')
+      }
+
+      return inv
     },
     withdrawl: async (parent, { id }, { me, models, lnd }) => {
-      return await models.withdrawl.findUnique({ where: { id: Number(id) } })
+      if (!me) {
+        throw new AuthenticationError('you must be logged in')
+      }
+
+      const wdrwl = await models.withdrawl.findUnique({
+        where: {
+          id: Number(id)
+        },
+        include: {
+          user: true
+        }
+      })
+
+      if (wdrwl.user.name !== me.name) {
+        throw new AuthenticationError('not ur withdrawl')
+      }
+
+      return wdrwl
     }
   },
 
   Mutation: {
     createInvoice: async (parent, { amount }, { me, models, lnd }) => {
       if (!me) {
-        throw new AuthenticationError('You must be logged in')
+        throw new AuthenticationError('you must be logged in')
       }
 
       if (!amount || amount <= 0) {
-        throw new UserInputError('Amount must be positive', { argumentName: 'amount' })
+        throw new UserInputError('amount must be positive', { argumentName: 'amount' })
       }
 
       // set expires at to 3 hours into future
@@ -47,18 +82,18 @@ export default {
     },
     createWithdrawl: async (parent, { invoice, maxFee }, { me, models, lnd }) => {
       if (!me) {
-        throw new AuthenticationError('You must be logged in')
+        throw new AuthenticationError('you must be logged in')
       }
 
       // decode invoice to get amount
       const decoded = await decodePaymentRequest({ lnd, request: invoice })
 
       const msatsFee = Number(maxFee) * 1000
+
       // create withdrawl transactionally (id, bolt11, amount, fee)
-      try {
+      const [withdrawl] = await serialize(models,
-        const [withdrawl] =
+        models.$queryRaw`SELECT * FROM create_withdrawl(${decoded.id}, ${invoice},
-        await models.$queryRaw`SELECT * FROM create_withdrawl(${decoded.id}, ${invoice},
+          ${Number(decoded.mtokens)}, ${msatsFee}, ${me.name})`)
-          ${Number(decoded.mtokens)}, ${msatsFee}, ${me.name})`
 
       // create the payment, subscribing to its status
       const sub = subscribeToPayViaRequest({
@@ -75,8 +110,8 @@ export default {
         // mtokens also contains the fee
         const fee = Number(e.fee_mtokens)
         const paid = Number(e.mtokens) - fee
-          await models.$queryRaw`
+        await serialize(models, models.$queryRaw`
-            SELECT confirm_withdrawl(${withdrawl.id}, ${paid}, ${fee})`
+            SELECT confirm_withdrawl(${withdrawl.id}, ${paid}, ${fee})`)
       })
 
       // if the payment fails, we need to
@@ -94,18 +129,11 @@ export default {
         } else if (e.is_route_not_found) {
           status = 'ROUTE_NOT_FOUND'
         }
-          await models.$queryRaw`
+        await serialize(models, models.$queryRaw`
-            SELECT reverse_withdrawl(${withdrawl.id}, ${status})`
+            SELECT reverse_withdrawl(${withdrawl.id}, ${status})`)
       })
 
       return withdrawl
-      } catch (error) {
-        const { meta: { message } } = error
-        if (message.includes('SN_INSUFFICIENT_FUNDS')) {
-          throw new UserInputError('insufficient funds')
-        }
-        throw error
-      }
     }
   },
 

components/comment.js

@@ -90,7 +90,10 @@ export default function Comment ({ item, children, replyOpen, includeParent, cac
           </div>}
         {reply &&
           <div className={styles.replyWrapper}>
-            <Reply parentId={item.id} onSuccess={() => setReply(replyOpen || false)} cacheId={cacheId} />
+            <Reply
+              parentId={item.id} autoFocus={!replyOpen}
+              onSuccess={() => setReply(replyOpen || false)} cacheId={cacheId}
+            />
           </div>}
         {children}
         <div className={`${styles.comments} ml-sm-1 ml-md-3`}>

components/form.js

@@ -93,7 +93,7 @@ export function Form ({
       validationSchema={schema}
       validateOnBlur={false}
       onSubmit={async (...args) =>
-        onSubmit && onSubmit(...args).catch(e => setError(e.message))}
+        onSubmit && onSubmit(...args).catch(e => setError(e.message || e))}
     >
       <FormikForm {...props} noValidate>
         {error && <Alert variant='danger' onClose={() => setError(undefined)} dismissible>{error}</Alert>}

components/reply.js

@@ -8,7 +8,7 @@ export const CommentSchema = Yup.object({
   text: Yup.string().required('required').trim()
 })
 
-export default function Reply ({ parentId, onSuccess }) {
+export default function Reply ({ parentId, onSuccess, autoFocus }) {
   const [createComment] = useMutation(
     gql`
       ${COMMENTS}
@@ -63,6 +63,7 @@ export default function Reply ({ parentId, onSuccess }) {
           name='text'
           as='textarea'
           rows={4}
+          autoFocus={autoFocus}
           required
         />
         <SubmitButton variant='secondary' className='mt-1'>reply</SubmitButton>

pages/withdrawls/[id].js

@@ -68,11 +68,11 @@ function LoadWithdrawl ({ query }) {
       variant = 'failed'
       break
     case 'PATHFINDING_TIMEOUT':
-      status = <>timed out trying to find route <small className='ml-3'>try increasing max fee</small></>
+      status = <>timed out finding route <small className='ml-3'>try increasing max fee</small></>
       variant = 'failed'
       break
     case 'ROUTE_NOT_FOUND':
-      status = <>could not find route <small className='ml-3'>try increasing max fee</small></>
+      status = <>no route <small className='ml-3'>try increasing max fee</small></>
       variant = 'failed'
       break
     default:

prisma/migrations/20210511170231_vote/migration.sql

@@ -1,5 +1,17 @@
 -- This is an empty migration.
 
+create function now_utc() returns timestamp as $$
+  select now() at time zone 'utc';
+$$ language sql;
+
+create function ASSERT_SERIALIZED() returns void as $$
+BEGIN
+    IF (select current_setting('transaction_isolation') <> 'serializable') THEN
+        RAISE EXCEPTION 'SN_NOT_SERIALIZABLE';
+    END IF;
+END;
+$$ language plpgsql;
+
 CREATE OR REPLACE FUNCTION vote(item_id INTEGER, username TEXT, vote_sats INTEGER)
 RETURNS INTEGER
 LANGUAGE plpgsql
@@ -8,6 +20,8 @@ DECLARE
     user_id INTEGER;
     user_sats INTEGER;
 BEGIN
+    PERFORM ASSERT_SERIALIZED();
+
     SELECT (msats / 1000), id INTO user_sats, user_id FROM users WHERE name = username;
     IF vote_sats > user_sats THEN
         RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
@@ -16,12 +30,15 @@ BEGIN
     UPDATE users SET msats = msats - (vote_sats * 1000) WHERE id = user_id;
 
     IF EXISTS (SELECT 1 FROM "Vote" WHERE "itemId" = item_id AND "userId" = user_id) THEN
-        INSERT INTO "Vote" (sats, "itemId", "userId", boost, updated_at) VALUES (vote_sats, item_id, user_id, true, 'now');
+        INSERT INTO "Vote" (sats, "itemId", "userId", boost, created_at, updated_at)
+        VALUES (vote_sats, item_id, user_id, true, now_utc(), now_utc());
     ELSE
-        INSERT INTO "Vote" (sats, "itemId", "userId", updated_at) VALUES (1, item_id, user_id, 'now');
+        INSERT INTO "Vote" (sats, "itemId", "userId", created_at, updated_at)
+        VALUES (1, item_id, user_id, now_utc(), now_utc());
         UPDATE users SET msats = msats + 1000 WHERE id = (SELECT "userId" FROM "Item" WHERE id = item_id);
         IF vote_sats > 1 THEN
-            INSERT INTO "Vote" (sats, "itemId", "userId", boost, updated_at) VALUES (vote_sats - 1, item_id, user_id, true, 'now');
+            INSERT INTO "Vote" (sats, "itemId", "userId", boost, created_at, updated_at)
+            VALUES (vote_sats - 1, item_id, user_id, true, now_utc(), now_utc());
         END IF;
     END IF;
 
@@ -38,6 +55,8 @@ DECLARE
     user_sats INTEGER;
     item "Item";
 BEGIN
+    PERFORM ASSERT_SERIALIZED();
+
     SELECT (msats / 1000), id INTO user_sats, user_id FROM users WHERE name = username;
     IF 1 > user_sats THEN
         RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
@@ -45,9 +64,11 @@ BEGIN
 
     UPDATE users SET msats = msats - 1000 WHERE id = user_id;
 
-    INSERT INTO "Item" (title, url, text, "userId", "parentId", updated_at)
+    INSERT INTO "Item" (title, url, text, "userId", "parentId", created_at, updated_at)
-    VALUES (title, url, text, user_id, parent_id, 'now') RETURNING * INTO item;
+    VALUES (title, url, text, user_id, parent_id, now_utc(), now_utc()) RETURNING * INTO item;
-    INSERT INTO "Vote" (sats, "itemId", "userId", updated_at) VALUES (1, item.id, user_id, 'now');
+
+    INSERT INTO "Vote" (sats, "itemId", "userId", created_at, updated_at)
+    VALUES (1, item.id, user_id, now_utc(), now_utc());
 
     RETURN item;
 END;
@@ -61,9 +82,12 @@ DECLARE
     user_id INTEGER;
     confirmed_at TIMESTAMP;
 BEGIN
+    PERFORM ASSERT_SERIALIZED();
+
     SELECT "userId", "confirmedAt" INTO user_id, confirmed_at FROM "Invoice" WHERE hash = lnd_id;
     IF confirmed_at IS NULL THEN
-        UPDATE "Invoice" SET "msatsReceived" = lnd_received, "confirmedAt" = 'now'  WHERE hash = lnd_id;
+        UPDATE "Invoice" SET "msatsReceived" = lnd_received, "confirmedAt" = now_utc(), updated_at = now_utc()
+        WHERE hash = lnd_id;
         UPDATE users SET msats = msats + lnd_received WHERE id = user_id;
     END IF;
     RETURN 0;

prisma/migrations/20210513002503_withdrawl_funcs/migration.sql

@@ -7,13 +7,15 @@ DECLARE
     user_msats INTEGER;
     withdrawl "Withdrawl";
 BEGIN
+    PERFORM ASSERT_SERIALIZED();
+
     SELECT msats, id INTO user_msats, user_id FROM users WHERE name = username;
     IF (msats_amount + msats_max_fee) > user_msats THEN
         RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
     END IF;
 
-    INSERT INTO "Withdrawl" (hash, bolt11, "msatsPaying", "msatsFeePaying", "userId", updated_at)
+    INSERT INTO "Withdrawl" (hash, bolt11, "msatsPaying", "msatsFeePaying", "userId", created_at, updated_at)
-    VALUES (lnd_id, invoice, msats_amount, msats_max_fee, user_id, 'now') RETURNING * INTO withdrawl;
+    VALUES (lnd_id, invoice, msats_amount, msats_max_fee, user_id, now_utc(), now_utc()) RETURNING * INTO withdrawl;
 
     UPDATE users SET msats = msats - msats_amount - msats_max_fee WHERE id = user_id;
 
@@ -29,8 +31,13 @@ DECLARE
     msats_fee_paying INTEGER;
     user_id INTEGER;
 BEGIN
+    PERFORM ASSERT_SERIALIZED();
+
     IF EXISTS (SELECT 1 FROM "Withdrawl" WHERE id = wid AND status IS NULL) THEN
-        UPDATE "Withdrawl" SET status = 'CONFIRMED', "msatsPaid" = msats_paid, "msatsFeePaid" = msats_fee_paid WHERE id = wid;
+        UPDATE "Withdrawl"
+        SET status = 'CONFIRMED', "msatsPaid" = msats_paid,
+        "msatsFeePaid" = msats_fee_paid, updated_at = now_utc()
+        WHERE id = wid;
         SELECT "msatsFeePaying", "userId" INTO msats_fee_paying, user_id FROM "Withdrawl" WHERE id = wid;
         UPDATE users SET msats = msats + (msats_fee_paying - msats_fee_paid) WHERE id = user_id;
     END IF;
@@ -48,8 +55,10 @@ DECLARE
     msats_paying INTEGER;
     user_id INTEGER;
 BEGIN
+    PERFORM ASSERT_SERIALIZED();
+
     IF EXISTS (SELECT 1 FROM "Withdrawl" WHERE id = wid AND status IS NULL) THEN
-        UPDATE "Withdrawl" SET status = wstatus WHERE id = wid;
+        UPDATE "Withdrawl" SET status = wstatus, updated_at = now_utc() WHERE id = wid;
         SELECT "msatsPaying", "msatsFeePaying", "userId" INTO msats_paying, msats_fee_paying, user_id FROM "Withdrawl" WHERE id = wid;
         UPDATE users SET msats = msats + msats_paying + msats_fee_paying WHERE id = user_id;
     END IF;

walletd/index.js

@@ -1,6 +1,7 @@
 const { PrismaClient } = require('@prisma/client')
 const { authenticatedLndGrpc, subscribeToInvoices, getInvoice, getPayment } = require('ln-service')
 const dotenv = require('dotenv')
+const serialize = require('../api/resolvers/serial')
 
 dotenv.config({ path: '..' })
 
@@ -15,9 +16,11 @@ const models = new PrismaClient()
 async function recordInvoiceStatus (inv) {
   console.log(inv)
   if (inv.is_confirmed) {
-    await models.$queryRaw`SELECT confirm_invoice(${inv.id}, ${Number(inv.received_mtokens)})`
+    await serialize(models,
+      models.$executeRaw`SELECT confirm_invoice(${inv.id}, ${Number(inv.received_mtokens)})`)
   } else if (inv.is_canceled) {
     // mark as cancelled
+    await serialize(models,
       models.invoice.update({
         where: {
           hash: inv.id
@@ -25,7 +28,7 @@ async function recordInvoiceStatus (inv) {
         data: {
           cancelled: true
         }
-    })
+      }))
   }
 }
 
@@ -67,8 +70,8 @@ async function recordWithdrawlStatus (id, wdrwl) {
     // is this true for getPayment?
     const fee = Number(wdrwl.payment.fee_mtokens)
     const paid = Number(wdrwl.mtokens) - fee
-    await models.$queryRaw`
+    await serialize(models, models.$executeRaw`
-      SELECT confirm_withdrawl(${id}, ${paid}, ${fee})`
+      SELECT confirm_withdrawl(${id}, ${paid}, ${fee})`)
   } else if (wdrwl.is_failed) {
     let status = 'UNKNOWN_FAILURE'
     if (wdrwl.failed.is_insufficient_balance) {
@@ -80,8 +83,8 @@ async function recordWithdrawlStatus (id, wdrwl) {
     } else if (wdrwl.failed.is_route_not_found) {
       status = 'ROUTE_NOT_FOUND'
     }
-    await models.$queryRaw`
+    await serialize(models, models.$executeRaw`
-      SELECT reverse_withdrawl(${id}, ${status})`
+      SELECT reverse_withdrawl(${id}, ${status})`)
   }
 }
 
@@ -90,7 +93,7 @@ async function checkPendingWithdrawls () {
   const leftovers = await models.withdrawl.findMany({
     where: {
       createdAt: {
-        lt: new Date(new Date().setSeconds(new Date().getSeconds() + 30))
+        lt: new Date(new Date().setSeconds(new Date().getSeconds() - 30))
       },
       status: {
         equals: null