Wallets

NorthFond supports managed and external EVM wallets. Managed wallet addresses are derived internally and cannot be supplied by callers. External wallets require a short-lived EIP-191 ownership challenge before live use.

Endpoint	Purpose
`POST /api/v1/business/wallets`	Register an external wallet
`GET /api/v1/business/wallets`	List wallets
`GET /api/v1/business/wallets/:id/balance`	Read chain-specific USDC balance
`POST /api/v1/business/wallets/:id/verification-challenges`	Create ownership challenge
`POST /api/v1/business/wallets/:id/verify`	Submit the signed challenge

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