The AddressToIP contracts are a pair of Ethereum contracts that map Ethereum addresses to IP addresses. The transaction sender can set and delete his, and only his, IP address entry. The data is public, so that anyone can obtain an IP for an Ethereum address (assuming the mapping exists).

The IPv4 contract is at address 0xd21e907c322c69a9932135eeb1d52fe5b661179a .

The IPv6 contract is at address 0x93a2863108236d86b3b02f851e0620af16d59568 .

• IPv4 and IPv6 support
• immortal (no one can delete the contract)
• written in Solidity

get_ip(address addr) returns (uint32) (no gas)

• Gets an IP address for an Ethereum address. If the entry does not exist, returns 0.

set_ip(uint32 ip) (20,318 gas)

• Sets the sender's IP address to ip

delete_ip() (20,295 gas)

• Deletes the sender's IP address

get_ip(address addr) returns (uint128) (no gas)

• Gets an IP address for an Ethereum address. If the entry does not exist, returns 0.

set_ip(uint128 ip) (20,362 gas)

• Sets the sender's IP address to ip

delete_ip() (20,273 gas)

• Deletes the sender's IP address

contract AddressToIPv4 {

    mapping (address => uint32) ips;

    function AddressToIPv4() {
    }

    function set_ip(uint32 ip) {
        ips[msg.sender] = ip;
    }

    function delete_ip() {
        delete ips[msg.sender];
    }

    function get_ip(address addr) returns (uint32) {
        return ips[addr];
    }
}

contract AddressToIPv6 {

    mapping (address => uint128) ips;

    function AddressToIPv6() {
    }

    function set_ip(uint128 ip) {
        ips[msg.sender] = ip;
    }

    function delete_ip() {
        delete ips[msg.sender];
    }

    function get_ip(address addr) returns (uint128) {
        return ips[addr];
    }
}

0.1.6-0/Release-Linux/g++/int linked to libethereum-0.9.93-0/Release-Linux/g++/int

• AddressToUrl - mapping Ethereum addresses to URLs