Multi-chain setup (Arc + Base)

Paylane supports Arc and Base in one app. Users pick the network from the header wallet menu; escrow, USDC, and explorers resolve per chain.

Supported chains

Key	Chain ID	USDC	Notes
`arc-testnet`	5042002	Native USDC (18 decimals on-chain)	Circle Arc Testnet
`base-sepolia`	84532	`0x036CbD53842c5426634e7929541eC2318f3dCF7e`	Base testnet
`base-mainnet`	8453	`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`	Production Base
`arc-mainnet`	(env)	(env)	When Arc mainnet launches

Environment

NEXT_PUBLIC_ACTIVE_CHAIN=arc-testnet
NEXT_PUBLIC_SUPPORTED_CHAINS=arc-testnet,base-sepolia

# Per-chain escrow (recommended)
NEXT_PUBLIC_ESCROW_ADDRESS_ARC_TESTNET=0x...
NEXT_PUBLIC_ESCROW_ADDRESS_BASE_SEPOLIA=0x...

Legacy NEXT_PUBLIC_CHAIN_ID, NEXT_PUBLIC_ESCROW_ADDRESS, and NEXT_PUBLIC_ARC_RPC still apply to the active chain.

Deploy escrow

# Arc Testnet
PRIVATE_KEY=0x... ./scripts/deploy-arc-testnet.sh

# Base Sepolia
PRIVATE_KEY=0x... ./scripts/deploy-base-sepolia.sh

# Base mainnet (when ready)
PRIVATE_KEY=0x... ./scripts/deploy-base-mainnet.sh

Wallet flow

Connect wallet in the header.
Choose Arc Testnet or Base Sepolia from the network dropdown.
Sign in (SIWE uses your wallet’s current chain).
Fund jobs — approve USDC and call the escrow proxy on that chain.

Amounts

The app ledger uses 6-decimal minor units everywhere. On Arc, on-chain USDC uses 18 decimals — Paylane scales automatically when approving and funding escrow. Base USDC is 6 decimals on-chain (no scaling).

Vercel / production

Set NEXT_PUBLIC_SUPPORTED_CHAINS and per-chain NEXT_PUBLIC_ESCROW_ADDRESS_* in the Vercel project env. Keep DEMO_MODE=false only when every chain you expose has a deployed escrow (or hide chains without escrow).