125 lines
5.4 KiB
Markdown
125 lines
5.4 KiB
Markdown
lightning-fundchannel -- Command for establishing a lightning channel
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=====================================================================
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SYNOPSIS
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--------
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**fundchannel** *id* *amount* [*feerate*] [*announce*] [*minconf*]
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[*utxos*] [*push\_msat*] [*close\_to*] [*request\_amt*] [*compact\_lease*]
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[*reserve*]
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DESCRIPTION
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-----------
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The **fundchannel** RPC command opens a payment channel with a peer by
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committing a funding transaction to the blockchain as defined in BOLT
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\#2.
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If not already connected, **fundchannel** will automatically attempt
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to connect if C-lightning knows a way to contact the node (either from
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normal gossip, or from a previous **connect** call).
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This auto-connection can fail if C-lightning does not know how to contact
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the target node; see lightning-connect(7).
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Once the
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transaction is confirmed, normal channel operations may begin. Readiness
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is indicated by **listpeers** reporting a *state* of `CHANNELD_NORMAL`
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for the channel.
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*id* is the peer id obtained from **connect**.
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*amount* is the amount in satoshis taken from the internal wallet to
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fund the channel. The string *all* can be used to specify all available
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funds (or 16777215 satoshi if more is available and large channels were not negotiated with the peer). Otherwise, it is in
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satoshi precision; it can be a whole number, a whole number ending in
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*sat*, a whole number ending in *000msat*, or a number with 1 to 8
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decimal places ending in *btc*. The value cannot be less than the dust
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limit, currently set to 546, nor more than 16777215 satoshi (unless large
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channels were negotiated with the peer).
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*feerate* is an optional feerate used for the opening transaction and as
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initial feerate for commitment and HTLC transactions. It can be one of
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the strings *urgent* (aim for next block), *normal* (next 4 blocks or
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so) or *slow* (next 100 blocks or so) to use lightningd's internal
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estimates: *normal* is the default.
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Otherwise, *feerate* is a number, with an optional suffix: *perkw* means
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the number is interpreted as satoshi-per-kilosipa (weight), and *perkb*
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means it is interpreted bitcoind-style as satoshi-per-kilobyte. Omitting
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the suffix is equivalent to *perkb*.
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*announce* is an optional flag that triggers whether to announce this
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channel or not. Defaults to `true`. An unannounced channel is considered
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private.
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*minconf* specifies the minimum number of confirmations that used
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outputs should have. Default is 1.
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*utxos* specifies the utxos to be used to fund the channel, as an array
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of "txid:vout".
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*push\_msat* is the amount of millisatoshis to push to the channel peer at
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open. Note that this is a gift to the peer -- these satoshis are
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added to the initial balance of the peer at channel start and are largely
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unrecoverable once pushed.
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*close\_to* is a Bitcoin address to which the channel funds should be sent to
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on close. Only valid if both peers have negotiated `option_upfront_shutdown_script`.
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Returns `close_to` set to closing script iff is negotiated.
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*request\_amt* is an amount of liquidity you'd like to lease from the peer.
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If peer supports `option_will_fund`, indicates to them to include this
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much liquidity into the channel. Must also pass in *compact\_lease*.
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*compact\_lease* is a compact represenation of the peer's expected
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channel lease terms. If the peer's terms don't match this set, we will
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fail to open the channel.
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*reserve* is the amount we want the peer to maintain on its side of the channel.
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Default is 1% of the funding amount. It can be a whole number, a whole number
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ending in *sat*, a whole number ending in *000msat*, or a number with 1 to 8
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decimal places ending in *btc*.
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This example shows how to use lightning-cli to open new channel with peer 03f...fc1 from one whole utxo bcc1...39c:0
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(you can use **listfunds** command to get txid and vout):
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lightning-cli -k fundchannel id=03f...fc1 amount=all feerate=normal utxos='["bcc1...39c:0"]'
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RETURN VALUE
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------------
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[comment]: # (GENERATE-FROM-SCHEMA-START)
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On success, an object is returned, containing:
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- **tx** (hex): The raw transaction which funded the channel
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- **txid** (txid): The txid of the transaction which funded the channel
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- **outnum** (u32): The 0-based output index showing which output funded the channel
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- **channel\_id** (hex): The channel\_id of the resulting channel (always 64 characters)
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- **close\_to** (hex, optional): The raw scriptPubkey which mutual close will go to; only present if *close\_to* parameter was specified and peer supports `option_upfront_shutdown_script`
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- **mindepth** (u32, optional): Number of confirmations before we consider the channel active.
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[comment]: # (GENERATE-FROM-SCHEMA-END)
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The following error codes may occur:
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- -1: Catchall nonspecific error.
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- 300: The maximum allowed funding amount is exceeded.
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- 301: There are not enough funds in the internal wallet (including fees) to create the transaction.
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- 302: The output amount is too small, and would be considered dust.
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- 303: Broadcasting of the funding transaction failed, the internal call to bitcoin-cli returned with an error.
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Failure may also occur if **lightningd** and the peer cannot agree on
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channel parameters (funding limits, channel reserves, fees, etc.).
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SEE ALSO
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--------
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lightning-connect(7), lightning-listfunds(), lightning-listpeers(7),
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lightning-feerates(7), lightning-multifundchannel(7)
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RESOURCES
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---------
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Main web site: <https://github.com/ElementsProject/lightning>
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[comment]: # ( SHA256STAMP:4c393a5fb6bd920dfbe2bbf79120f5d11bc9f5b18d71a70a519d245b0c366ee6)
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