thread Re: Bitcoin Merchant Pubkey in Payments Troubleshooting

Bitcoin Merchant Pubkey

tee_vee — Mon, 02 Feb 2026 00:58:52 GMT

Is Square using the same pubkey for all merchants in the US for Bitcoin LN payments?

Re: Bitcoin Merchant Pubkey

rtfulk — Tue, 03 Feb 2026 04:08:33 GMT

@tee_vee Welcome to the community. I did a search and this was all I could find on the pubkey.

Short answer: There’s no public documentation from Square stating that they use a single Lightning pubkey for all merchants or a separate one per merchant. Square’s Lightning integration is abstracted from merchants, and they manage invoice generation and key management internally within their system.

Re: Bitcoin Merchant Pubkey

_Violet — Tue, 03 Feb 2026 22:00:21 GMT

Hi @tee_vee - I see this is your first post in the Square Community so I'd like to officially welcome you! 🎉👏 My name is Violet and I'm one of the Community Moderators. Nice to meet you 🙂

Here's the answer I received from the Bitcoin Product Team: Square Lightning payments are a custodial design, and the pubkeys are unique to the custodian (Square), but not to each merchant.

I hope this answers your question, but please let me know if I can help with anything else!