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lightning-txprepare -- Command to prepare to withdraw funds from the internal wallet
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====================================================================================
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SYNOPSIS
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--------
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**txprepare** *outputs* \[*feerate*\] \[*minconf*\] \[*utxos*\]
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DESCRIPTION
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-----------
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The **txprepare** RPC command creates an unsigned transaction which
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spends funds from c-lightning’s internal wallet to the outputs specified
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in *outputs*.
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The *outputs* is the array of output that include *destination*
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and *amount*(\{*destination*: *amount*\}). Its format is like:
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\[\{address1: amount1\}, \{address2: amount2\}\]
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or
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\[\{address: *all*\}\].
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It supports any number of **confirmed** outputs.
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The *destination* of output is the address which can be of any Bitcoin accepted
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type, including bech32.
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The *amount* of output is the amount to be sent from the internal wallet
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(expressed, as name suggests, in amount). The string *all* can be used to specify
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all available funds. Otherwise, it is in amount precision; it can be a whole
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number, a whole number ending in *sat*, a whole number ending in *000msat*,
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or a number with 1 to 8 decimal places ending in *btc*.
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*feerate* is an optional feerate to use. It can be one of the strings
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*urgent* (aim for next block), *normal* (next 4 blocks or so) or *slow*
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(next 100 blocks or so) to use lightningd’s internal estimates: *normal*
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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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*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 transaction, as an array
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of "txid:vout". These must be drawn from the node's available UTXO set.
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**txprepare** is similar to the first part of a **withdraw** command, but
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supports multiple outputs and uses *outputs* as parameter. The second part
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is provided by **txsend**.
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RETURN VALUE
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------------
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On success, an object with attributes *unsigned\_tx* and *txid* will be
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returned. You need to hand *txid* to **txsend** or **txdiscard**, as the
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inputs of this transaction are reserved until then, or until the daemon
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restarts.
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*unsigned\_tx* represents the raw bitcoin transaction (not yet signed)
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and *txid* represent the bitcoin transaction id.
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On failure, an error is reported and the transaction is not created.
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The following error codes may occur:
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- -1: Catchall nonspecific error.
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- 301: There are not enough funds in the internal wallet (including
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fees) to create the transaction.
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- 302: The dust limit is not met.
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AUTHOR
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------
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Rusty Russell <<rusty@rustcorp.com.au>> is mainly responsible.
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SEE ALSO
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--------
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lightning-withdraw(7), lightning-txsend(7), lightning-txdiscard(7),
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lightning-feerates(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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