[
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        "anonymous": false,
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                "indexed": true,
                "name": "buyer",
                "type": "address"
            },
            {
                "indexed": false,
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            },
            {
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                "name": "tokens_sold",
                "type": "uint256"
            },
            {
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                "name": "bought_id",
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            },
            {
                "indexed": false,
                "name": "tokens_bought",
                "type": "uint256"
            }
        ],
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    },
    {
        "anonymous": false,
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            {
                "indexed": true,
                "name": "provider",
                "type": "address"
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            {
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            {
                "indexed": false,
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                "indexed": false,
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            {
                "indexed": false,
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    },
    {
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    },
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                "indexed": true,
                "name": "provider",
                "type": "address"
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            {
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                "type": "address"
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                "type": "uint256"
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        ],
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                "indexed": true,
                "name": "deadline",
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                "indexed": true,
                "name": "admin",
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                "name": "deadline",
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]