Contract Overview
Balance: 0 Ether
Transactions: 4666090 txns
 Latest 25 transactions from a total of 4666090 transactions

TxHash Age From To Value [TxFee]
0x40c47fdacb41d75ee59176ae35d811be4f114874d4825b4232d36d8b9850b8072 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x0b3d78516d02f8251e8de55a28be6e1d1ab245755ff2c97f53ee968e29aef2032 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x939750ab8bb47757ae3fcd08bbcc6785d6799ca187b308ab41e6f1d2df424fac2 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x4e45df2569a1008244c69856aeea908652cc99f866edb4a1154944678d5c30bb2 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x42e6c0c8611b1672b988a30ae3b70a9c0351c4fcc275e537a0f9a0b9bbc0d2be4 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xff0c8751d6dcbedf1e9562e82d3515885d24413a45c8a14c34d20bf7120542584 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xd645137183a057e770837b67f1d3800bb947a4d446d3b95697f202a1a7f0c35d4 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xfb33e8de785b119d570516504d3e7cfd86c3b3df70d50046cf29d7cbf4bd309c4 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x69b2415dc45901ed922916e5d38f31a7d1f46c22142cc34f32822e4a5b64877f4 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x6ac44f1b13c13a118f6dbd12690e0d2b844e3b6002255f21990807f81111fe4d4 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xb29a48d155863a10021ba6bb5c50375e4afed356c1a390ae6bfa25cb4a02b0654 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x240553f5d3a4ea107eb36823d88b2a00ce86f64aab58e117cb04ab1be60f78d94 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xe1e25c83326a5758d94ddfd91051eb8351180df3778f67e2300c155533c9f7654 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x5f02bbdcad22584e950f8788338f352051f9d36abd6da856f77d24668b43dd5b4 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xf2638cf5a9c7044b96369d2ac974ae72ac112687c6c14575a4b6ecfd4c53279c4 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x677f1e817b8af79359d340f7764b60a7bdc00ed54643fc8f0107718d57e236466 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x55247697aa9dccf709ce3c085df229b374dc4cfec1696259338c5f8ad93172d76 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xac694394c01f28e3ee2cf97c8b92767ad5a0464f6e36f1cb50f59ab407793b8c6 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xcedcdeba75ebfad07c253ac252a5ed51b0b17804b4a5e95604e064e31de6f9916 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x225c3d51c0f871bbaf7fb9503391c468c450af3a2f36e054a69ee05f3ecbb47e6 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x9d3e4c3dccd64d56cc386d19632f8d050d6d6f83281b0a671fa4f8d61e7c34f26 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x1ebda008f1efc7d06bc61b93a4fc667cdda51cc437b42079555b9a3402deba166 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xec34e7f1d75da60924e75c28b9aa60d8ec767f8942a6004e185fd9f4ca8902686 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0x3ff33a93f43232899d408b74547a473eb1a3dbfb388e87a5be831ddb03c7a0ab6 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
0xbc39178f12ba4a1fa77400f64dd8e7d6489bed9a4c68536540dc935388103ca86 mins ago0xd1d1baa591933bca66f5e99be8843a0b7df9f334  IN   0xb11ea8d6bab4c557a781785425a2c5654f8826630 Ether0.000042027
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ParentTxHash Block Age From To Value
Contract Source Code Verified (Exact Match)
Contract Name: Blockhashes
Compiler Text: v0.4.25+commit.59dbf8f1
Optimization Enabled: No
Runs (Optimiser):  200



  Contract Source Code   Find Similiar Contracts

pragma solidity ^0.4.25;

contract Blockhashes {
    
    mapping(uint => bytes32) public hashes;
    event Error(string msg);
    
    function add_recent (uint n) public {
        bytes32 h = blockhash(n);
        if (h == 0) {
            emit Error("blockhash fails");
        } else {
            hashes[n] = h;
        }
    }
    
    function add_old (uint n, bytes memory child_header) public {
        bytes32 child_hash = hashes[n+1];
        assert(child_hash == keccak256(child_header));
        bytes memory parent_hash = new bytes(32);
        for(uint i=0; i< 32; i++){
            parent_hash[i] = child_header[i+4];
        }
        bytes32 h;
        assembly {
            h := mload(add(parent_hash, 32))
        }
        hashes[n] = h;
    }
    
    function get_blockhash (uint n) public constant returns (bytes32) {
        return hashes[n];
    }
    
}

    Contract ABI  
[{"constant":false,"inputs":[{"name":"n","type":"uint256"},{"name":"child_header","type":"bytes"}],"name":"add_old","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"hashes","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"n","type":"uint256"}],"name":"get_blockhash","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"n","type":"uint256"}],"name":"add_recent","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":false,"name":"msg","type":"string"}],"name":"Error","type":"event"}]

  Contract Creation Code Switch To Opcodes View
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

   Swarm Source:
bzzr://6f60b72f308387bc08492caa7ab91da704d36290d75d1e66c14786facb324596

 

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