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wrote this chapter properly

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10_6_Spending_a_P2SH_Transaction.md
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> **WARNING:** This chapter is awaiting the writing of chapter 12+
# 8.5: Spending a P2SH Transaction
# 10.6: Spending a P2SH Transaction
> :information_source: **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning.
Before we close out this overview of P2SH transactions, we're going to touch upon how to spend them.
Before we close out this overview of P2SH transactions, we're going to touch upon how to spend them. This section is mainly an overview, referring back to a previous section where we _already_ spent a P2SH transaction.
## Use the Redeem Script
@ -12,24 +10,35 @@ As we saw in [§6.2: Spending a Transaction to a Multisig](06_2_Spending_a_Trans
### Collect Your Variables
Because P2SH addresses aren't integrated into `bitcoin-cli` there will be no short-cuts for P2SH spending like you saw in [§6.3: Sending an Automated Multisig](6_3_Sending_an_Automated_Multisig.md). You're going to need to collect all the more complex variables on your own!
Because P2SH addresses other than the special multisig and nested Segwit addresses aren't integrated into `bitcoin-cli` there will be no short-cuts for P2SH spending like you saw in [§6.3: Sending an Automated Multisig](6_3_Sending_an_Automated_Multisig.md). You're going to need to collect all the more complex variables on your own!
[[PENDING]]
This means that you need to collect:
[[Notes: Example of saving redeemScript, recipient, keys, and scriptPubKey.]]
* The `hex` of the `scriptPubKey` for the transaction you're spending
* The serialized `redeemScript`
* Any private keys, since you'll be signing by hand
* All of the regular `txids`, `vouts`, and `addresses` that you'd need
## Create the Transaction
[[PENDING]]
As we saw in §6.2, the creation of a transaction is pretty standard:
```
$ rawtxhex=$(bitcoin-cli -named createrawtransaction inputs='''[ { "txid": "'$utxo_txid'", "vout": '$utxo_vout' } ]''' outputs='''{ "'$recipient'": 0.00005}''')
$ echo $rawtxhex
020000000121654fa95d5a268abf96427e3292baed6c9f6d16ed9e80511070f954883864b10000000000ffffffff0188130000000000001600142c48d3401f6abed74f52df3f795c644b4398844600000000
```
However, signing requires entering extra information for the (1) `scriptPubKey`; (2) the `redeemScript`; and (3) any required private keys.
[Notes: I *think* this is just the same as what we did in chapter 6.2, but I need to actually receive a P2SH transaction to test it, and that requires first getting to the APIs, then using one to send myself a P2SH transaction, then writing up how to respend that.]
Here's the example of doing so for that P2SH-embedded multisig in §6.2:
```
$ bitcoin-cli -named signrawtransactionwithkey hexstring=$rawtxhex prevtxs='''[ { "txid": "'$utxo_txid'", "vout": '$utxo_vout', "scriptPubKey": "'$utxo_spk'", "redeemScript": "'$redeem_script'" } ]''' privkeys='["cNPhhGjatADfhLD5gLfrR2JZKDE99Mn26NCbERsvnr24B3PcSbtR"]'
```
With any other sort of P2SH you're going to be including a different `redeemscript`, but otherwise the practice is exactly the same. The only difference is that after two chapters of work on Scripts you now understand what the `scriptPubKey` is and what the `redeemScript` is, so hopefully what were mysterious elements four chapters ago are now old hat.
## Summary: Spending a Transaction with a Bitcoin Script
[[PENDING]]
[Notes: Say it's just like respending that multisig, the hard way]
You already spent a P2SH back in Chapter 6, when you resent a multsig transaction the hard way, which required lining up the `scriptPubKey` and `redeemScript` information. Now you know that the `scriptPubKey` is a standardized P2SH locking script, while the `redeemScript` matches a hash in that locking script and that you need to be able to run it with the proper variables to receive a `True` result. But other than knowing more, there's nothing new in spending a P2SH transaction, because you already did it!
## What's Next?
Advance through "Bitcoin Scripting" with [Chapter Nine: Empowering Timelock with Bitcoin Scripts](09_0_Empowering_Timelock_with_Bitcoin_Scripts.md).
Advance through "Bitcoin Scripting" with [Chapter Eleven: Empowering Timelock with Bitcoin Scripts](11_0_Empowering_Timelock_with_Bitcoin_Scripts.md).