Transaction Inputs | Bitcointalksearch.org

RHavar

legendary

Activity: 1463

Merit: 1886

Quote from: MakFrogz on June 04, 2019, 04:20:22 AM

I know it, but output change index every time. I saw transaction where output which i need was in 1. In this example output in 0. I must know every time where my output locate

Yup. That's what "vout" means. I knew it was the 0th because in the example I gave it said 0. But as you've realized, it's often different.

MakFrogz

newbie

Activity: 13

Merit: 1

I know it, but output change index every time. I saw transaction where output which i need was in 1. In this example output in 0. I must know every time where my output locate

RHavar

legendary

Activity: 1463

Merit: 1886

It's pretty annoying, but a transaction doesn't encode the input amounts or fee. So you have to derive it yourself.

If you look at your first input of your transaction was:

Code:

{
   "txid": "a13300eb2da6fc3d2d8f0a19cc8fa26fcb626544dfe298657384baf6a3bafffa",
   "vout": 0,
   ...
   }

So we need to fetch that transaction and look at the 0th (first) output which says the amount ( in this case: 0.01398886 tBTC). When you do that for all inputs, you can calculate the amount of bitcoin sourced. Subtract how much the transaction sent, and the left over is the fee.

---

BTW if you're only looking at unconfirmed transactions, a lot of the rpc methods in core will actually tell you the fees of it.

odolvlobo

legendary

Activity: 4522

Merit: 3426

Quote from: MakFrogz on June 03, 2019, 10:09:57 AM

Code:

...
"vin": [
{
"txid": "a13300eb2da6fc3d2d8f0a19cc8fa26fcb626544dfe298657384baf6a3bafffa",
"vout": 0,
...
},
{
"txid": "5102bb4807593b24917c0782f9d50d5f3eb11715357bfcb91bcde2d2f65ad23d",
"vout": 0,
...
}
],
...

The inputs of the transaction are outputs 0 and 0 of transactions a13300eb2da6fc3d2d8f0a19cc8fa26fcb626544dfe298657384baf6a3bafffa and 5102bb4807593b24917c0782f9d50d5f3eb11715357bfcb91bcde2d2f65ad23d. Is that what you want to know?

MakFrogz

newbie

Activity: 13

Merit: 1

Hi, guys!

How i can get more information about input? I need to know input value because i want to calculate fee.
Maybe you know how i can calculate fee easier because i want subtract sum of inputs with sum of outputs!Thx!

Code:

{
"txid": "d765459127e6ccdb8cd040e78ef682ede7d983675f764fa77fb59137b35909eb",
"hash": "1a80b7177a933b9e33c8fc981973b4f943325a196c7a59e279a620b40ea2ca04",
"version": 2,
"size": 372,
"vsize": 210,
"locktime": 1518869,
"vin": [
{
"txid": "a13300eb2da6fc3d2d8f0a19cc8fa26fcb626544dfe298657384baf6a3bafffa",
"vout": 0,
"scriptSig": {
"asm": "",
"hex": ""
},
"txinwitness": [
"3044022057464a3514fde7506a951234f125ef8f8712a7343c31a01ff85f58588be53f4902206714a6fb43b0
e2aea6b84daeffc2d81de66d6757897c0ae2841e20d34fc27701",
"02ca1eab6d2bbe2cacc8586127938667b9e57dc7db6561becd79935da5d708c123"
],
"sequence": 4294967294
},
{
"txid": "5102bb4807593b24917c0782f9d50d5f3eb11715357bfcb91bcde2d2f65ad23d",
"vout": 0,
"scriptSig": {
"asm": "",
"hex": ""
},
"txinwitness": [
"304402207f184cbb1ad21a22c0b60eb4e778006b378569b274290c840e8c2a944da7b06c02203a1d1a5eff4c
3ceb6d3f47f10716adca0aa157561b8eaf642ba6f1a497038301",
"021d6943965a2b9ca7a8696a99f87cd6a5bc717ad66bc1101f5213c463a1bbeee3"
],
"sequence": 4294967294
}
],
"vout": [
{
"value": 0.01000000,
"n": 0,
"scriptPubKey": {
"asm": "OP_HASH160 5fb08d7e43c1293dbd444da17c321e06ac2718a4 OP_EQUAL",
"hex": "a9145fb08d7e43c1293dbd444da17c321e06ac2718a487",
"reqSigs": 1,
"type": "scripthash",
"addresses": [
"2N1yBgc3cttCJNTvm8Dxi87SB6NXgo2Cr5p"
]
}
},
{
"value": 0.01797587,
"n": 1,
"scriptPubKey": {
"asm": "OP_HASH160 7be878c8010286a567731ffa8ec083ccac31c334 OP_EQUAL",
"hex": "a9147be878c8010286a567731ffa8ec083ccac31c33487",
"reqSigs": 1,
"type": "scripthash",
"addresses": [
"2N4YPbJXjNkMntrLQx8HhDTKFd1YTFxPq1Q"
]
}
}
]
}

Topic: Transaction Inputs (Read 248 times)