Utility Contracts

A 6-line contract storing a single public string, deployed Day 9 of Ethereum by a prolific early experimenter who shipped 18 contracts in one week.

A tour of the EVM globals, carrying the constructor of the file it was copied from

The basic info getter from the solidity-baby-steps tutorials, a read only window onto the block and message globals.

A contract built to probe what the msg globals actually return, endowed with 5 ETH, deployed 1 September 2015.

A third deployment of the msgExaminer that records its own creation message

A contract built to probe what the msg globals return, endowed with 3 ETH on 1 September 2015.

The endowment retriever from the solidity-baby-steps tutorials, whose send-one-ether-home function anyone can call.

The second incrementer from the solidity-baby-steps tutorials, written to show what a transactional call looks like from geth.

The third incrementer from the solidity-baby-steps tutorials, adding a second parameter to the transactional call.

An earlier draft of the solidity-baby-steps Pong, before the value moved into the constructor.

The Pong half of the solidity-baby-steps ping-pong pair, written to test whether one contract can read a non-constant return value from another.

The Greeter from the solidity-baby-steps tutorials, which is a different contract from the ethereum.org greeter of the same idea.

The Pong half of Cyrus Adkisson's contract to contract call exercise

A copy of the greeter contract from the Frontier Guide, storing the greeting 'You ninnie'.

The string indexOf from the solidity-baby-steps tutorials, with a diagnostic slot recording which branch last ran.

The SimpleStorage tutorial contract with a log event added to its setter.

The five element Descriptor from Cyrus Adkisson's Solidity walkthrough

A two hundred byte contract that returns a fixed array, from a Solidity teaching series

Etheria v0.6, the version whose tiles can never change hands

A minimal event-logging contract with a single function log(uint256) that emits MyEvent. Compiled with soljson v0.1.2, optimizer off.

The SimpleStorage example that opens the Solidity documentation, retyped with its two functions in the other order.

A two function ownership holder from October 2015 whose setter has no access control, so any address can take it over.

A 108 byte ownership holder whose setter checks nothing, so any address can name itself owner.

Etheria v0.7, the fatally bugged proto its author could never reproduce