Exemple :
https://blockchain.info/fr/tx/eecd65f389847552418dd488872513a797a4969798e7beac9c8bd066582db068Hou le pas beau une transaction avec 0 Fee (

Methode facile maintenant
On cherche la transaction en memoire :
getrawtransaction eecd65f389847552418dd488872513a797a4969798e7beac9c8bd066582db068

0100000001a86243e41c53f1dd7993deda7ba80e3d623dc8acc76000e6ce84f912c7d4a01f01000
0006b4830450221008dab391b5e3236ff9a9a84ccfab62b0a7e6ecf7a3df2fcf148cf0e29705916
85022011bdb8fa285ecf0a63b4f25ae43ae7118ccaead8ad7502dbe69fadb2a2f3f5bf012102c4c
de6e607a972d7e9be6fc391b2eeb10131b19634e22f36459f755f220b8759feffffff02ea910b00
000000001976a914489f375f631d30e66b35e8169a6c3d8e90287e4088ac80841e0000000000197
6a9141313483ee887846836c70cb5e5f107195cb528ab88acb3470600
On decode la transaction
https://blockchain.info/fr/decode-txOn on va sur
https://blockchain.info/fr/tx/eecd65f389847552418dd488872513a797a4969798e7beac9c8bd066582db068Si il l'on encore en memoire
{
"lock_time":411571,
"size":226,
"inputs":[
{
"prev_out":{
"index":1,
"hash":"1fa0d4c712f984cee60060c7acc83d623d0ea87bdade9379ddf1531ce44362a8"
},
"script":"4830450221008dab391b5e3236ff9a9a84ccfab62b0a7e6ecf7a3df2fcf148cf0e2970591685022011bdb8fa285ecf0a63b4f25ae43ae7118ccaead8ad7502dbe69fadb2a2f3f5bf012102c4cde6e607a972d7e9be6fc391b2eeb10131b19634e22f36459f755f220b8759"
}
],
"version":1,
"vin_sz":1,
"hash":"eecd65f389847552418dd488872513a797a4969798e7beac9c8bd066582db068",
"vout_sz":2,
"out":[
{
"script_string":"OP_DUP OP_HASH160 489f375f631d30e66b35e8169a6c3d8e90287e40 OP_EQUALVERIFY OP_CHECKSIG",
"address":"17czPMYXs41bzVUwVsfM8EaW3JcCPdLF5g",
"value":758250,
"script":"76a914489f375f631d30e66b35e8169a6c3d8e90287e4088ac"
},
{
"script_string":"OP_DUP OP_HASH160 1313483ee887846836c70cb5e5f107195cb528ab OP_EQUALVERIFY OP_CHECKSIG",
"address":"12jrwPyrF5UxWmgcdM2KzirAkkHuEpRYc3",
"value":2000000,
"script":"76a9141313483ee887846836c70cb5e5f107195cb528ab88ac"
}
]
}
https://chainquery.com/bitcoin-api/createrawtransactionCela vous donne qu'elle que chose comme ceci .
0100000001a86243e41c53f1dd7993deda7ba80e3d623dc8acc76000e6ce84f912c7d4a01f01000
00000ffffffff0280841e00000000001976a9141313483ee887846836c70cb5e5f107195cb528ab
88ac9ace0a00000000001976a914489f375f631d30e66b35e8169a6c3d8e90287e4088ac0000000
0
Varifier que les montant sont bon
https://coinb.in/#verifyTous montant non depensé sera les fee donc attention
01:58:09

signrawtransaction 0100000001a86243e41c53f1dd7993deda7ba80e3d623dc8acc76000e6ce84f912c7d4a01f01000
00000ffffffff0280841e00000000001976a9141313483ee887846836c70cb5e5f107195cb528ab
88ac9ace0a00000000001976a914489f375f631d30e66b35e8169a6c3d8e90287e4088ac0000000
0
01:58:09

{
"hex": "0100000001a86243e41c53f1dd7993deda7ba80e3d623dc8acc76000e6ce84f912c7d4a01f01000
0006b483045022100c29ae21d37134fc047fa8ac6646fc2933d0dadf53bc22b8eb1e767f7adf3ce
a302202e98036f75eacac2050045892600c5f9d744d61b286a30363a4eef143633f799012102c4c
de6e607a972d7e9be6fc391b2eeb10131b19634e22f36459f755f220b8759ffffffff0280841e00
000000001976a9141313483ee887846836c70cb5e5f107195cb528ab88ac9ace0a0000000000197
6a914489f375f631d30e66b35e8169a6c3d8e90287e4088ac00000000",
"complete": true
}
Maintenant brocaster la
https://coinb.in/#broadcastEt voila le travail une double depense dans la mempool
Trivial a faire. Toujours attendre des confirmation
https://blockchain.info/tx/ec271ccb80e2d28213f25cba4046ad88e3a02707b63afcd7d17f4648683683bf