Vercel environment variables — Paylane (full list)

Where: Vercel → Project paylane → Settings → Environment Variables
Apply to: Production, Preview, and Development (all three)

Root directory: apps/web
Live URL: https://paylane-nu.vercel.app

1. Database (from Neon — keep if already connected)

Do not delete these if the Neon integration created them:

Variable	Notes
`DATABASE_URL`	Pooled Postgres URL (Neon)
`DATABASE_URL_UNPOOLED`	Optional — Neon
`POSTGRES_PRISMA_URL`	Optional — used by Prisma on Vercel
`POSTGRES_URL`	Optional — Neon
`POSTGRES_URL_NON_POOLING`	Optional — Neon
`POSTGRES_USER`	Optional — Neon
`POSTGRES_PASSWORD`	Optional — Neon
`POSTGRES_HOST`	Optional — Neon
`POSTGRES_DATABASE`	Optional — Neon
`NEON_PROJECT_ID`	Optional — Neon

If Neon is connected, you only need to add/update the variables in sections 2–4 below.

2. Server secrets (required)

Generate fresh values for production (do not copy local dev secrets):

openssl rand -hex 32   # SESSION_SECRET
openssl rand -hex 24   # CRON_SECRET

Variable	Value
`SESSION_SECRET`	`<output of openssl rand -hex 32>`
`CRON_SECRET`	`<output of openssl rand -hex 24>`
`ADMIN_WALLETS`	`0x3799cafa388da047caf7c999e31c844705fadfae`

3. App mode

Variable	Value
`DEMO_MODE`	`false`

4. Multi-chain — public (copy all)

Variable	Value
`NEXT_PUBLIC_ACTIVE_CHAIN`	`arc-testnet`
`NEXT_PUBLIC_SUPPORTED_CHAINS`	`arc-testnet,base-sepolia`
`NEXT_PUBLIC_NETWORK`	`testnet`
`NEXT_PUBLIC_CHAIN_NAME`	`Arc Testnet`
`NEXT_PUBLIC_CHAIN_ID`	`5042002`
`NEXT_PUBLIC_RPC`	`https://rpc.testnet.arc.network`
`NEXT_PUBLIC_ARC_RPC`	`https://rpc.testnet.arc.network`
`NEXT_PUBLIC_USDC_ADDRESS`	`0x3600000000000000000000000000000000000000`
`NEXT_PUBLIC_EXPLORER_URL`	`https://testnet.arcscan.app`
`NEXT_PUBLIC_ESCROW_ADDRESS`	`0x144762e02f9676593D955CF0d184323474C79805`
`NEXT_PUBLIC_ESCROW_ADDRESS_ARC_TESTNET`	`0x144762e02f9676593D955CF0d184323474C79805`
`NEXT_PUBLIC_RPC_BASE_SEPOLIA`	`https://sepolia.base.org`
`NEXT_PUBLIC_USDC_ADDRESS_BASE_SEPOLIA`	`0x036CbD53842c5426634e7929541eC2318f3dCF7e`
`NEXT_PUBLIC_EXPLORER_URL_BASE_SEPOLIA`	`https://sepolia.basescan.org`
`NEXT_PUBLIC_ESCROW_ADDRESS_BASE_SEPOLIA`	`0x7275FB5e77c18143F8f87d8B1485Ca840ADec1eB`

5. Money rules (optional — defaults match app)

Variable	Value
`PLATFORM_FEE_BPS`	`200`
`REVIEW_WINDOW_HOURS`	`72`
`REVISION_LIMIT`	`2`
`DISPUTE_EVIDENCE_HOURS`	`72`
`API_CREDIT_ON_SELLER_5XX`	`true`

Full copy-paste block (non-Neon vars)

SESSION_SECRET=PASTE_OPENSSL_RAND_HEX_32_HERE
CRON_SECRET=PASTE_OPENSSL_RAND_HEX_24_HERE
ADMIN_WALLETS=0x3799cafa388da047caf7c999e31c844705fadfae
DEMO_MODE=false

NEXT_PUBLIC_ACTIVE_CHAIN=arc-testnet
NEXT_PUBLIC_SUPPORTED_CHAINS=arc-testnet,base-sepolia
NEXT_PUBLIC_NETWORK=testnet
NEXT_PUBLIC_CHAIN_NAME=Arc Testnet
NEXT_PUBLIC_CHAIN_ID=5042002
NEXT_PUBLIC_RPC=https://rpc.testnet.arc.network
NEXT_PUBLIC_ARC_RPC=https://rpc.testnet.arc.network
NEXT_PUBLIC_USDC_ADDRESS=0x3600000000000000000000000000000000000000
NEXT_PUBLIC_EXPLORER_URL=https://testnet.arcscan.app
NEXT_PUBLIC_ESCROW_ADDRESS=0x144762e02f9676593D955CF0d184323474C79805
NEXT_PUBLIC_ESCROW_ADDRESS_ARC_TESTNET=0x144762e02f9676593D955CF0d184323474C79805
NEXT_PUBLIC_RPC_BASE_SEPOLIA=https://sepolia.base.org
NEXT_PUBLIC_USDC_ADDRESS_BASE_SEPOLIA=0x036CbD53842c5426634e7929541eC2318f3dCF7e
NEXT_PUBLIC_EXPLORER_URL_BASE_SEPOLIA=https://sepolia.basescan.org
NEXT_PUBLIC_ESCROW_ADDRESS_BASE_SEPOLIA=0x7275FB5e77c18143F8f87d8B1485Ca840ADec1eB

PLATFORM_FEE_BPS=200
REVIEW_WINDOW_HOURS=72
REVISION_LIMIT=2
DISPUTE_EVIDENCE_HOURS=72
API_CREDIT_ON_SELLER_5XX=true

Escrow addresses (reference)

Chain	Proxy
Arc Testnet	`0x144762e02f9676593D955CF0d184323474C79805`
Base Sepolia	`0x7275FB5e77c18143F8f87d8B1485Ca840ADec1eB`

These are different — one deployment per chain.

After saving

Deployments → Redeploy (or push to master).
Open https://paylane-nu.vercel.app/settings — both chains should show Live escrow.
Use the header network dropdown to switch Arc ↔ Base Sepolia.