isabella232 / addresstourl

Ethereum contract for mapping Ethereum addresses to URLs

About

The AddressToUrl contract is an Ethereum contract that maps Ethereum addresses to URLs. The transaction sender can set and clear his, and only his, URL entry. The data is public, so that anyone can obtain a URL for an Ethereum address (assuming the mapping exists).

The contract is at address 0xf94e9f9657dcbbe991b175d8a0433cd20704093e .

Features

• generic string implementation allows for all types of URLs
• immortal (no one can delete the contract)
• written in Solidity

API and gas estimate

get_url(address addr) returns (string) (no gas)

• Gets a URL for an Ethereum address. If the entry does not exist, returns an empty string.

set_url(string url) (gas usage depends on URL size)

• Sets the sender's URL to url

Source code

contract AddressToUrl {

    mapping (address => string) urls;

    function AddressToUrl() {
    }

    function set_url(string url) {
        urls[msg.sender] = url;
    }

    function get_url(address addr) returns (string) {
        return urls[addr];
    }
}

Compiler version

v0.2.0-2016-01-24-194679f via https://chriseth.github.io/browser-solidity/

See also

• AddressToIP - mapping Ethereum addresses to IP addresses