brendanjryan · Nov 4, 2026 · Sep 30, 2026 · Sep 30, 2026 · Sep 30, 2026 · Nov 4, 2026
diff --git a/db/migrations/0026_tempo_workspace_ousd.sql b/db/migrations/0026_tempo_workspace_ousd.sql
@@ -0,0 +1,8 @@
+-- Make OUSD the default tip token for Tempo's own Slack workspace (T098H03GGE6) on mainnet.
+UPDATE "workspace"
+SET
+  "default_token_address" = '0x20c0000000000000000000006a37DA5C996874BE',
+  "updated_at" = strftime('%Y-%m-%dT%H:%M:%fZ', 'now')
+WHERE "provider" = 'slack'
+  AND "provider_id" = 'T098H03GGE6'
+  AND "chain_id" = 4217;
diff --git a/src/api.ts b/src/api.ts
@@ -115,7 +115,9 @@ export const api = new Hono<{
       chainName: Tempo.getChainName(link.chain_id),
       expiresAt: link.expires_at,
       ok: true as const,
-      tokenAddress: Address.checksum(link.default_token_address ?? Tempo.addressLookup.pathUsd),
+      tokenAddress: Address.checksum(
+        link.default_token_address ?? Tempo.getDefaultTokenAddress(link.chain_id),
+      ),
     })
   })
   .post(
@@ -176,7 +178,9 @@ export const api = new Hono<{
           expiresAt: link.access_key_expires_at,
           keyAuthorization: body.keyAuthorization,
           rootAddress: body.address,
-          tokenAddress: Address.checksum(link.default_token_address ?? Tempo.addressLookup.pathUsd),
+          tokenAddress: Address.checksum(
+            link.default_token_address ?? Tempo.getDefaultTokenAddress(link.chain_id),
+          ),
         })
         const now = new Date().toISOString()
         const existingAccount = await c.var.db
@@ -252,7 +256,9 @@ export const api = new Hono<{
           .where(
             'token_address',
             '=',
-            Address.checksum(link.default_token_address ?? Tempo.addressLookup.pathUsd),
+            Address.checksum(
+              link.default_token_address ?? Tempo.getDefaultTokenAddress(link.chain_id),
+            ),
           )
           .execute()
         await c.var.db
@@ -274,7 +280,7 @@ export const api = new Hono<{
             id: Nanoid.generate(),
             revoked_at: null,
             token_address: Address.checksum(
-              link.default_token_address ?? Tempo.addressLookup.pathUsd,
+              link.default_token_address ?? Tempo.getDefaultTokenAddress(link.chain_id),
             ),
             updated_at: now,
           })

diff --git a/src/api.workers.test.ts b/src/api.workers.test.ts
@@ -1509,7 +1509,7 @@ describe('/api/account/link/:token', () => {
       accessKeyAddress: pending.accessKey.address,
       accessKeyPublicKey: pending.accessKey.publicKey,
       ok: true,
-      tokenAddress: Tempo.addressLookup.pathUsd,
+      tokenAddress: Tempo.getDefaultTokenAddress(pending.workspace.chain_id),
     })
   })
 
@@ -1906,7 +1906,8 @@ describe('/api/confirm/:token', () => {
       recipientProviderUserId: 'twitter-confirm-recipient',
       senderProviderUserId: 'twitter-confirm-sender',
       source: 'mention',
-      tokenAddress: workspace.default_token_address ?? Tempo.addressLookup.pathUsd,
+      tokenAddress:
+        workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id),
       workspaceId: workspace.id,
     })
 
@@ -1973,7 +1974,8 @@ describe('/api/confirm/:token', () => {
       recipientProviderUserId,
       senderProviderUserId,
       source: 'mention',
-      tokenAddress: workspace.default_token_address ?? Tempo.addressLookup.pathUsd,
+      tokenAddress:
+        workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id),
       workspaceId: workspace.id,
     } satisfies Confirmation.Payload
     const token = await Confirmation.encrypt(env, payload)
@@ -3100,7 +3102,8 @@ async function signKeyAuthorization(
     chainId: pending.workspace.chain_id,
     expiresAt: pending.link.access_key_expires_at,
     tokenAddress: Address.checksum(
-      pending.workspace.default_token_address ?? Tempo.addressLookup.pathUsd,
+      pending.workspace.default_token_address ??
+        Tempo.getDefaultTokenAddress(pending.workspace.chain_id),
     ),
   })
 }

diff --git a/src/chat.ts b/src/chat.ts
@@ -832,7 +832,8 @@ const actions = {
     }
 
     const reactionTipConfigs = await getReactionTipConfigs(DB.create(env.DB), workspace.id)
-    const tokenAddress = workspace.default_token_address ?? Tempo.addressLookup.pathUsd
+    const tokenAddress =
+      workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id)
     const tokenOptions = workspaceTokenOptions(workspace.chain_id)
     const tokenValue =
       tokenOptions.find((option) => option.address.toLowerCase() === tokenAddress.toLowerCase())
@@ -1014,7 +1015,7 @@ const modalSubmits = {
     if (!creator) return
 
     const tokenAddress = Address.checksum(
-      workspace.default_token_address ?? Tempo.addressLookup.pathUsd,
+      workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id),
     )
     const balance = await Actions.token.getBalance(
       createClient({
@@ -1167,7 +1168,8 @@ const modalSubmits = {
     if (!installation) return
 
     const now = new Date()
-    const tokenAddress = workspace.default_token_address ?? Tempo.addressLookup.pathUsd
+    const tokenAddress =
+      workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id)
     const tipRaffle = {
       chain_id: workspace.chain_id,
       created_at: now.toISOString(),
@@ -1375,7 +1377,8 @@ const handlers = {
       return
     }
 
-    const tokenAddress = workspace.default_token_address ?? Tempo.addressLookup.pathUsd
+    const tokenAddress =
+      workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id)
     const token = await Tapimo.getTokenMetadata(env, workspace.chain_id, tokenAddress)
     if (!('openModal' in event)) {
       await postPrivateReply(
@@ -1451,7 +1454,8 @@ const handlers = {
       return
     }
 
-    const tokenAddress = workspace.default_token_address ?? Tempo.addressLookup.pathUsd
+    const tokenAddress =
+      workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id)
     const token = await Tapimo.getTokenMetadata(env, workspace.chain_id, tokenAddress)
     if (!('openModal' in event)) return
     await event.openModal(
@@ -1579,7 +1583,8 @@ const handlers = {
       provider_id: ctx.provider.id,
       provider_message_ts: 'pending',
       requester_member_id: requester.memberId,
-      token_address: workspace.default_token_address ?? Tempo.addressLookup.pathUsd,
+      token_address:
+        workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id),
       updated_at: now,
       workspace_id: workspace.id,
     } satisfies DB_gen.Insertable.tip_ask
@@ -2243,7 +2248,11 @@ const handlers = {
     }
 
     const tokenAddress = parsed.token
-      ? Tempo.getTokenAddress(workspace?.chain_id ?? Tempo.chainLookup.mainnet, parsed.token)
+      ? Tempo.getTokenAddress(
+          workspace?.chain_id ?? Tempo.chainLookup.mainnet,
+          parsed.token,
+          workspace?.default_token_address,
+        )
       : null
     if (parsed.token && !tokenAddress) {
       await postPrivateReply(
@@ -2590,6 +2599,7 @@ const tipRaffleDurationOptions = [
   { label: '7 days', ms: 7 * 24 * 60 * 60 * 1000, value: '7d' }, // 7 days
 ] as const
 const tokenOptions = [
+  { address: Tempo.addressLookup.ousd, label: 'OUSD', value: 'OUSD' },
   { address: Tempo.addressLookup.pathUsd, label: 'PathUSD', value: 'pathUSD' },
   { address: Tempo.addressLookup.usdcE, label: 'USDC.e', value: 'USDC.e' },
   { address: Tempo.addressLookup.usdt0, label: 'USDT0', value: 'USDT0' },
@@ -4608,7 +4618,9 @@ async function sendTipRaffleEscrowPayout(
       feePayer: 'sender',
       isDefaultToken: Address.isEqual(
         Address.checksum(existing.token_address),
-        Address.checksum(existing.default_token_address ?? Tempo.addressLookup.pathUsd),
+        Address.checksum(
+          existing.default_token_address ?? Tempo.getDefaultTokenAddress(existing.chain_id),
+        ),
       ),
       memo: existing.memo,
       ok: true,
@@ -4745,7 +4757,9 @@ async function sendTipRaffleEscrowPayout(
       feePayer: 'sender',
       isDefaultToken: Address.isEqual(
         Address.checksum(input.tokenAddress),
-        Address.checksum(workspace.default_token_address ?? Tempo.addressLookup.pathUsd),
+        Address.checksum(
+          workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id),
+        ),
       ),
       memo: input.memo,
       ok: true,
@@ -4890,7 +4904,10 @@ async function tipRaffleMessage(db: DB.Type, tipRaffle: TipRaffleMessageInput) {
     const value = formatAmount(amount)
     return Address.isEqual(
       Address.checksum(tipRaffle.token_address),
-      Address.checksum(tipRaffle.workspace_default_token_address ?? Tempo.addressLookup.pathUsd),
+      Address.checksum(
+        tipRaffle.workspace_default_token_address ??
+          Tempo.getDefaultTokenAddress(tipRaffle.chain_id),
+      ),
     )
       ? formatCurrencyAmount(value, token.currency)
       : formatTipAmount(value, token.currency, token.symbol)
@@ -4997,7 +5014,9 @@ async function tipAskMessage(db: DB.Type, tipAsk: TipAskMessageInput) {
     const value = formatAmount(amount)
     return Address.isEqual(
       Address.checksum(tipAsk.token_address),
-      Address.checksum(tipAsk.workspace_default_token_address ?? Tempo.addressLookup.pathUsd),
+      Address.checksum(
+        tipAsk.workspace_default_token_address ?? Tempo.getDefaultTokenAddress(tipAsk.chain_id),
+      ),
     )
       ? formatCurrencyAmount(value, token.currency)
       : formatTipAmount(value, token.currency, token.symbol)
@@ -5312,7 +5331,7 @@ export async function updateReceiptBoostAggregate(
       const amount = formatAmount(group.amount)
       const displayAmount = Address.isEqual(
         Address.checksum(group.tokenAddress),
-        Address.checksum(group.defaultTokenAddress ?? Tempo.addressLookup.pathUsd),
+        Address.checksum(group.defaultTokenAddress ?? Tempo.getDefaultTokenAddress(group.chainId)),
       )
         ? formatCurrencyAmount(amount, token.currency)
         : formatTipAmount(amount, token.currency, token.symbol)
@@ -6056,7 +6075,9 @@ async function postConnectLink(event: TipEvent, ctx: HandlerContext) {
       (row) =>
         !row.token_address ||
         row.token_address.toLowerCase() ===
-          (workspace.default_token_address ?? Tempo.addressLookup.pathUsd).toLowerCase(),
+          (
+            workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id)
+          ).toLowerCase(),
     )
     if (accessKey && !ctx.forceConnectRefresh) {
       await postPrivateReply(event, event.user, 'Already connected', { threadTs: ctx.threadTs })
@@ -6801,7 +6822,7 @@ async function reactionTipAggregateText(
       const amount = formatAmount(row.amount)
       const displayAmount = Address.isEqual(
         Address.checksum(row.token_address),
-        Address.checksum(row.default_token_address ?? Tempo.addressLookup.pathUsd),
+        Address.checksum(row.default_token_address ?? Tempo.getDefaultTokenAddress(row.chain_id)),
       )
         ? formatCurrencyAmount(amount, token.currency)
         : formatTipAmount(amount, token.currency, token.symbol)
@@ -6819,7 +6840,7 @@ async function reactionTipAggregateText(
       const amount = formatAmount(row.amount)
       const displayAmount = Address.isEqual(
         Address.checksum(row.token_address),
-        Address.checksum(row.default_token_address ?? Tempo.addressLookup.pathUsd),
+        Address.checksum(row.default_token_address ?? Tempo.getDefaultTokenAddress(row.chain_id)),
       )
         ? formatCurrencyAmount(amount, token.currency)
         : formatTipAmount(amount, token.currency, token.symbol)
@@ -6844,7 +6865,7 @@ async function reactionTipAggregateText(
       const amount = formatAmount(row.amount)
       const displayAmount = Address.isEqual(
         Address.checksum(row.token_address),
-        Address.checksum(row.default_token_address ?? Tempo.addressLookup.pathUsd),
+        Address.checksum(row.default_token_address ?? Tempo.getDefaultTokenAddress(row.chain_id)),
       )
         ? formatCurrencyAmount(amount, token.currency)
         : formatTipAmount(amount, token.currency, token.symbol)
@@ -7036,7 +7057,9 @@ export async function updateSlackPendingTipMessage(db: DB.Type, result: Tip.Pend
     .executeTakeFirst()
   const amount = Address.isEqual(
     Address.checksum(result.pendingTip.token_address),
-    Address.checksum(workspace?.default_token_address ?? Tempo.addressLookup.pathUsd),
+    Address.checksum(
+      workspace?.default_token_address ?? Tempo.getDefaultTokenAddress(result.pendingTip.chain_id),
+    ),
   )
     ? formatCurrencyAmount(formatAmount(result.pendingTip.amount), tokenMetadata.currency)
     : formatTipAmount(
@@ -7320,7 +7343,8 @@ async function configCard(
   options?: { canEdit?: boolean; updated?: boolean },
 ) {
   const reactionTipConfigs = await getReactionTipConfigs(db, workspace.id)
-  const tokenAddress = workspace.default_token_address ?? Tempo.addressLookup.pathUsd
+  const tokenAddress =
+    workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id)
   const token = Tempo.getTokenMetadataFallback(tokenAddress)
   const networkLabel = workspace.chain_id === Tempo.chainLookup.mainnet ? 'Mainnet' : 'Testnet'
   return {
@@ -7429,7 +7453,8 @@ function configFallbackText(
   reactionTipConfigs: ReactionTipConfig[],
   options?: { updated?: boolean },
 ) {
-  const tokenAddress = workspace.default_token_address ?? Tempo.addressLookup.pathUsd
+  const tokenAddress =
+    workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id)
   return `Setting Value\nNetwork ${configNetworkLabel(workspace)}\nDefault token ${configToken(workspace).symbol} ${Tempo.explorerLink(workspace.chain_id, tokenAddress)}\nDefault amount ${formatAmount(workspace.default_amount)}\nReaction tips ${reactionTipConfigsText(reactionTipConfigs)}${options?.updated ? '\nWorkspace settings updated' : ''}`
 }
 
@@ -7439,7 +7464,7 @@ function configNetworkLabel(workspace: DB_gen.Selectable.workspace) {
 
 function configToken(workspace: DB_gen.Selectable.workspace) {
   return Tempo.getTokenMetadataFallback(
-    workspace.default_token_address ?? Tempo.addressLookup.pathUsd,
+    workspace.default_token_address ?? Tempo.getDefaultTokenAddress(workspace.chain_id),
   )
 }
 

diff --git a/src/chat.workers.test.ts b/src/chat.workers.test.ts
@@ -3463,7 +3463,9 @@ test('@Tipbot mention connect link completion connects local workspace account',
     accessKeyAddress: link.access_key_address,
     chainId: link.chain_id,
     expiresAt: link.access_key_expires_at,
-    tokenAddress: Address.checksum(link.default_token_address ?? Tempo.addressLookup.pathUsd),
+    tokenAddress: Address.checksum(
+      link.default_token_address ?? Tempo.getDefaultTokenAddress(link.chain_id),
+    ),
   })
 
   const completeResponse = await client.api.account.link[':token'].$post({
@@ -3716,7 +3718,9 @@ test('@Tipbot mention connect link completion notifies Slack Connect external ac
     accessKeyAddress: link.access_key_address,
     chainId: link.chain_id,
     expiresAt: link.access_key_expires_at,
-    tokenAddress: Address.checksum(link.default_token_address ?? Tempo.addressLookup.pathUsd),
+    tokenAddress: Address.checksum(
+      link.default_token_address ?? Tempo.getDefaultTokenAddress(link.chain_id),
+    ),
   })
 
   const completeResponse = await client.api.account.link[':token'].$post({
@@ -4527,7 +4531,9 @@ test('@Tipbot mention claims Slack Connect pending tip when recipient connects',
         accessKeyAddress: link.access_key_address,
         chainId: link.chain_id,
         expiresAt: link.access_key_expires_at,
-        tokenAddress: Address.checksum(link.default_token_address ?? Tempo.addressLookup.pathUsd),
+        tokenAddress: Address.checksum(
+          link.default_token_address ?? Tempo.getDefaultTokenAddress(link.chain_id),
+        ),
       }),
     },
     param: { token },
@@ -7362,7 +7368,7 @@ describe('/tip config', () => {
         },
         { timeout: 10_000 }, // 10 seconds
       )
-      .toEqual(['pathUSD', 'USDC.e', 'USDT0'])
+      .toEqual(['OUSD', 'pathUSD', 'USDC.e', 'USDT0'])
     fetchSpy.mockRestore()
   }, 20_000) // 20 seconds
 

diff --git a/src/lib/slack.ts b/src/lib/slack.ts
@@ -616,6 +616,7 @@ async function buildHomeView(input: {
     (async () => {
       // Fetch balances for every token allowed in this workspace, falling back to RPC.
       const tokens = [
+        { address: Tempo.addressLookup.ousd, label: 'OUSD' },
         { address: Tempo.addressLookup.pathUsd, label: 'PathUSD' },
         { address: Tempo.addressLookup.usdcE, label: 'USDC.e' },
         { address: Tempo.addressLookup.usdt0, label: 'USDT0' },