How to detect failed transactions on Oura

[catad83]

My question is how to determine that a transactions has failed or it's valid? How to filter out valid transactions only? What determines a tranaction as failed?

Given this tx: "ab2a7b26f6e943a903115a0968606c8943d335ec883943eb15f235dc1b3b1df6"

oura output is something like this:
{
hash: 'ab2a7b26f6e943a903115a0968606c8943d335ec883943eb15f235dc1b3b1df6',
fee: 334095,
ttl: 134326200,
validity_interval_start: null,
network_id: null,
input_count: 2,
collateral_input_count: 1,
has_collateral_output: false,
output_count: 2,
mint_count: 0,
total_output: 2414159228,
metadata: null,
inputs: [
{
tx_id: '5227ae7ce2a5053f9fb875df530710ead958df6cd0d1b895323aed8cf23417a7',
index: 1
},
{
tx_id: 'e3b33fe542b72b99e1e07567ea9f07d7c4441fe69e06d5454567526696cef349',
index: 0
}
],
outputs: [
{
address: 'addr1x94ec3t25egvhqy2n265xfhq882jxhkknurfe9ny4rl9k6dj764lvrxdayh2ux30fl0ktuh27csgmpevdu89jlxppvrst84slu',
amount: 1875506797,
assets: [Array],
datum_hash: '74799166868417267be05f670b11f6a6c9a78d9168b79a7d90d822de10b7bc7e',
inline_datum: [Object]
},
{
address: 'addr1qx483zx9hkk6jyzfcn96m4nsxj6gg7ynvknz5apyvssr957s7j7aagcgd7nk0y7ztu0p80rg4k2jf0dfflz5zjqtnh6s2czhkw',
amount: 538652431,
assets: [Array],
datum_hash: null,
inline_datum: null
}
],
collateral_inputs: [
{
tx_id: '53f81e6b0fa6bd6867c632e7dcc395bbfbd6f75803fc85c470e7e193199f7146',
index: 2
}
],
collateral_output: null,
mint: null,
vkey_witnesses: [
{
vkey_hex: '98290f9ab608892bba5e57da6128ab7ebad6208db6aa9f922bfabbe0b5d1a19a',
signature_hex: 'd59ec491f3b973073eed3babf5b7202c75710562ad321abe2ba0056bcf56a54a308998dc8654c3b02053aa15037ba915e967e85ab12b231df9d5a54851fbb30c'
}
],
native_witnesses: [],
plutus_witnesses: [],
plutus_redeemers: [
{
purpose: 'spend',
ex_units_mem: 530000,
ex_units_steps: 165000000,
input_idx: 1,
plutus_data: [Object]
}
],
plutus_data: [],
withdrawals: null,
size: 844
}