Funding Transaction

The funding transaction is the on-chain anchor that establishes a Lightning channel.

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What is a Funding Transaction?

A funding transaction is a standard Bitcoin transaction that pays to a 2-of-2 multisignature address controlled by both channel participants. Once confirmed on-chain, the channel is considered "open."

Technical Details

Multisig: Uses OP_CHECKMULTISIG (legacy) or MuSig2 (Taproot).
Confirmation: Typically requires 3-6 confirmations before use.
UTXO: Creates the UTXO that will be spent by the first commitment transaction.