Chaîne de Blocs

Qu’est-ce qu’une blockchain ?

Une blockchain est une base de données distribuée et sécurisée qui enregistre les informations dans des blocs liés entre eux par des hashs. Chaque nouveau bloc contient un identifiant unique (hash), ainsi que le hash du bloc précédent, assurant ainsi l’intégrité de la chaîne.

Bloc #1
Hash

8pBtiNlERsC5iHBldsNYclMK5jpU9Snf39phliTkuHqxDNNusDanJULUBe7nVBgf

Hash précédent

0

Timestamp

2025-07-23 19:44:00

Données
{
    "message": "Bloc Genesis"
}
Bloc #2
Hash

VPDxkA1gQI3Wvd1Q6TD2ipR77tspLQPvOMM8rZpRhPrOtHT6g92FbImSFtDYq5E6

Hash précédent

8pBtiNlERsC5iHBldsNYclMK5jpU9Snf39phliTkuHqxDNNusDanJULUBe7nVBgf

Timestamp

2025-07-23 19:44:10

Données
{
    "message": "Deuxième bloc de la chaîne"
}
Bloc #3
Hash

LXSCH6jC5dJcpDr7vX55u6kYl2p98WLNwAGi1SHVePL0nbnJBoC0doURuPnHmkLB

Hash précédent

VPDxkA1gQI3Wvd1Q6TD2ipR77tspLQPvOMM8rZpRhPrOtHT6g92FbImSFtDYq5E6

Timestamp

2025-07-23 19:44:20

Données
{
    "message": "Troisième bloc avec contrat intelligent",
    "0": {
        "id": 1,
        "block_id": 3,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 2,
        "smart_contract": {
            "type": "simple_transfer"
        },
        "amount": 10.12345678,
        "created_at": "2025-07-23 19:44:00"
    },
    "1": {
        "id": 2,
        "block_id": 3,
        "sender_wallet_id": 2,
        "receiver_wallet_id": 3,
        "smart_contract": {
            "type": "simple_transfer"
        },
        "amount": 5.87654321,
        "created_at": "2025-07-23 19:44:00"
    }
}
Bloc #5
Hash

54955a21c16f26c7bfb0b87ce69b4c9696d79478c2aab881231101f8a7ad2749

Hash précédent

LXSCH6jC5dJcpDr7vX55u6kYl2p98WLNwAGi1SHVePL0nbnJBoC0doURuPnHmkLB

Timestamp

2026-01-26 22:16:21

Données
[
    {
        "id": 3,
        "block_id": 5,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 5,
        "smart_contract": {
            "type": "deposit",
            "description": "Dépôt de fonds"
        },
        "amount": "25",
        "created_at": "2026-01-27 03:16:21"
    }
]
Bloc #6
Hash

ddf0b88d6c078f22f179e71cf663ea6a0fcfa6fdb397a800a6010ad65dc839fd

Hash précédent

54955a21c16f26c7bfb0b87ce69b4c9696d79478c2aab881231101f8a7ad2749

Timestamp

2026-01-26 23:27:29

Données
[
    {
        "id": 4,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 7,
        "smart_contract": {
            "type": "deposit",
            "description": "Dépôt de fonds"
        },
        "amount": "25",
        "created_at": "2026-01-27 04:27:29"
    },
    {
        "id": 24,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 14,
        "smart_contract": {
            "type": "deposit",
            "description": "Dépôt de fonds"
        },
        "amount": "10",
        "created_at": "2026-02-06 22:49:16"
    },
    {
        "id": 25,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"mint_token\",\"token_id\":23,\"token_symbol\":\"GG\",\"description\":\"Cr\\u00e9ation du token GG pour Jimmy-Steve\"}",
        "amount": "566",
        "created_at": "2026-02-07 03:11:08"
    },
    {
        "id": 26,
        "block_id": 6,
        "sender_wallet_id": 14,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":1,\"token_symbol\":\"BTC\",\"description\":\"Achat du token BTC\"}",
        "amount": "56",
        "created_at": "2026-02-07 12:44:12"
    },
    {
        "id": 27,
        "block_id": 6,
        "sender_wallet_id": 14,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":23,\"token_symbol\":\"GG\",\"token_amount\":0.39285714285714285,\"description\":\"Achat de 0.39285714285714 GG\"}",
        "amount": "22",
        "created_at": "2026-02-07 13:40:26"
    },
    {
        "id": 28,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 15,
        "smart_contract": "{\"action\":\"mint_token\",\"token_id\":24,\"token_symbol\":\"KIKI\",\"description\":\"Cr\\u00e9ation du token KIKI pour Alex T\\u00e9rieur\"}",
        "amount": "123456",
        "created_at": "2026-02-07 13:50:08"
    },
    {
        "id": 29,
        "block_id": 6,
        "sender_wallet_id": 15,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":23,\"token_symbol\":\"GG\",\"token_amount\":0.21428571428571427,\"description\":\"Achat de 0.21428571428571 GG\"}",
        "amount": "12",
        "created_at": "2026-02-07 13:50:52"
    },
    {
        "id": 30,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"mint_token\",\"token_id\":25,\"token_symbol\":\"KIKI\",\"description\":\"Cr\\u00e9ation du token KIKI pour Jimmy-Steve\"}",
        "amount": "123456",
        "created_at": "2026-02-07 14:11:55"
    },
    {
        "id": 31,
        "block_id": 6,
        "sender_wallet_id": 15,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":25,\"token_symbol\":\"KIKI\",\"token_amount\":1,\"description\":\"Achat de 1 KIKI\"}",
        "amount": "12",
        "created_at": "2026-02-07 14:13:03"
    },
    {
        "id": 32,
        "block_id": 6,
        "sender_wallet_id": 14,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":25,\"token_symbol\":\"KIKI\",\"token_amount\":1,\"description\":\"Achat de 1 KIKI\"}",
        "amount": "12",
        "created_at": "2026-02-10 03:11:14"
    },
    {
        "id": 33,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":25,\"token_symbol\":\"KIKI\",\"token_amount\":1,\"description\":\"Achat de 1 KIKI\"}",
        "amount": "12",
        "created_at": "2026-02-13 02:27:00"
    },
    {
        "id": 34,
        "block_id": 6,
        "sender_wallet_id": 14,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":25,\"token_symbol\":\"KIKI\",\"token_amount\":0.10442773600668337,\"description\":\"Achat de 0.10442773600668 KIKI\"}",
        "amount": "1",
        "created_at": "2026-02-21 18:37:15"
    },
    {
        "id": 35,
        "block_id": 6,
        "sender_wallet_id": 14,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":25,\"token_symbol\":\"KIKI\",\"token_amount\":0.10442773600668337,\"description\":\"Achat de 0.10442773600668 KIKI\"}",
        "amount": "1",
        "created_at": "2026-02-23 03:13:30"
    },
    {
        "id": 36,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 14,
        "smart_contract": {
            "type": "deposit",
            "description": "Dépôt de fonds"
        },
        "amount": "4",
        "created_at": "2026-02-24 03:39:13"
    },
    {
        "id": 37,
        "block_id": 6,
        "sender_wallet_id": 14,
        "receiver_wallet_id": 1,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":1,\"token_symbol\":\"BTC\",\"token_amount\":1.0072522159548751,\"description\":\"Achat de 1.0072522159549 BTC\"}",
        "amount": "1",
        "created_at": "2026-02-24 03:47:13"
    },
    {
        "id": 38,
        "block_id": 6,
        "sender_wallet_id": 14,
        "receiver_wallet_id": 1,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":15,\"token_symbol\":\"PDT\",\"token_amount\":1.0428616122640526,\"description\":\"Achat de 1.0428616122641 PDT\"}",
        "amount": "1",
        "created_at": "2026-02-25 02:50:15"
    },
    {
        "id": 39,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 15,
        "smart_contract": "{\"action\":\"mint_token\",\"token_id\":27,\"token_symbol\":\"AX\",\"description\":\"Cr\\u00e9ation du token AX pour Alex T\\u00e9rieur\"}",
        "amount": "20000",
        "created_at": "2026-02-27 23:20:06"
    },
    {
        "id": 40,
        "block_id": 6,
        "sender_wallet_id": 14,
        "receiver_wallet_id": 14,
        "smart_contract": "{\"action\":\"buy_token\",\"token_id\":25,\"token_symbol\":\"KIKI\",\"token_amount\":0.9274717121127806,\"description\":\"Achat de 0.92747171211278 KIKI\"}",
        "amount": "10",
        "created_at": "2026-08-09 21:17:49"
    },
    {
        "id": 41,
        "block_id": 6,
        "sender_wallet_id": 1,
        "receiver_wallet_id": 16,
        "smart_contract": {
            "type": "deposit",
            "description": "Dépôt de fonds"
        },
        "amount": "2000",
        "created_at": "2026-08-11 22:48:14"
    }
]
Pourquoi c’est important ?

La blockchain permet une transparence totale et une sécurité renforcée des données, puisqu’aucun bloc ne peut être modifié sans affecter l’ensemble de la chaîne. C’est ce qui en fait une technologie de confiance pour des systèmes comme les cryptomonnaies, les contrats intelligents et bien plus encore.

📜 Contrats Intelligents

vote

Adresse: mbjz...ycwz
Bloc ID: 3
Propriétaire: KaZfmhdZQlXAChLXGXFw5wdJ4PbOo7kfjUllBIBe6Z
Actif: Oui
Exécuté le: 2025-07-23 19:44

Paramètres
{
    "question": "Êtes-vous d’accord avec la motion ?",
    "options": [
        "Oui",
        "Non"
    ]
}
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