Ethereum

Contract resources

• Step by Step Towards Creating a Safe Smart Contract: https://eprint.iacr.org/2015/460.pdf (Based on Serpent instead of Solidity)
• Token contracts: https://github.com/ConsenSys/Tokens
• Slock.it contracts: https://github.com/slockit/smart-contract
• The DAO contracts: https://github.com/slockit/DAO

Light client

Thus far, there is no light client implementation. In general a light client would keep track of block headers + logs that are of interest. The data involved is obviously higher than in Bitcoin (much faster block rate 17s instead of 10min + bigger headers ~500 bytes instead of 80 -> ~220 times bandwidth and storage (asymptotically) requirement than bitcoin)

• https://github.com/ethereum/wiki/wiki/Light-client-protocol

What would we have to store within the contract such that a branch of the current state trie would suffice?

Alternatively we would have to assume that we can connect to a trusted via JSON RPC.

Other stuff

• My initial write up from 3 months ago :) https://hackpad.com/Solar-System-zrDtHRVdxSY