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Update 4_3_Creating_a_Raw_Transaction_with_Named_Arguments.md

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Shannon Appelcline 2017-04-03 16:24:49 -07:00 committed by GitHub
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4_3_Creating_a_Raw_Transaction_with_Named_Arguments.md
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@ -36,3 +36,58 @@ $ bitcoin-cli -named getbalance account="*" minconf=1
## Test Out a Raw Transaction
Here's what all the commands for sending a raw transaction would look like with named arguments:
```
$ utxo_txid=$(bitcoin-cli listunspent | jq -r '.[0] | .txid')
$ utxo_vout=$(bitcoin-cli listunspent | jq -r '.[0] | .vout')
$ recipient="n2eMqTT929pb1RDNuqEnxdaLau1rxy3efi"
$ rawtxhex=$(bitcoin-cli -named createrawtransaction inputs='''[ { "txid": "'$utxo_txid'", "vout": '$utxo_vout' } ]''' outputs='''{ "'$recipient'": 0.7595 }''')
$ bitcoin-cli -named decoderawtransaction hexstring=$rawtxhex
{
"txid": "f445f121085d98635f7302e641f815d1ca4ce70f0e1b03f144ad1661dc5e10e7",
"hash": "f445f121085d98635f7302e641f815d1ca4ce70f0e1b03f144ad1661dc5e10e7",
"size": 85,
"vsize": 85,
"version": 2,
"locktime": 0,
"vin": [
{
"txid": "2b5f5798359e0e23e02764588166f222d4ce056419dec83c743b72aad171d708",
"vout": 1,
"scriptSig": {
"asm": "",
"hex": ""
},
"sequence": 4294967295
}
],
"vout": [
{
"value": 0.75950000,
"n": 0,
"scriptPubKey": {
"asm": "OP_DUP OP_HASH160 e7c1345fc8f87c68170b3aa798a956c2fe6a9eff OP_EQUALVERIFY OP_CHECKSIG",
"hex": "76a914e7c1345fc8f87c68170b3aa798a956c2fe6a9eff88ac",
"reqSigs": 1,
"type": "pubkeyhash",
"addresses": [
"n2eMqTT929pb1RDNuqEnxdaLau1rxy3efi"
]
}
}
]
}
$ signedtx=$(bitcoin-cli -named signrawtransaction hexstring=$rawtxhex | jq -r '.hex')
$ bitcoin-cli -named sendrawtransaction hexstring=$signedtx
8000dca7b1e7ab70f4056bc4512af6ffff7727d1588436521da3e5d886dbcddf
```
Voila! You've sent out another raw transaction, but this time using named arguments for clarity and to reduce errors.
> **WARNING:** This doesn't actually seem to work at the moment. The `createrawtransaction` command gives the error "Unknown named parameter inputs", though it's definitely listed as the appropriate argument name in the help page.
With this lesson out of the way, we're now going to put named arguments back on the shelf. If you want to use it your own, you should; just consult the `help` info for each command to see what the arguments are called. However, this tutorial will now return to the shorter (but not necessarily more intuitive) use of ordered arguments.
## Summary: Creating a Raw Transaction with Named Arguments
By running `bitcoin-cli` with the `-named` flag, you can use named arguments rather than depending on ordered arguments. `bitcoin-cli help` will always show you the right name for each argument. This can result in more robust, easier-to-read, less error-prone code.