Survivors: Hugo (H), Sawyer (S), Kate (K), Jack (J)
Blockchain is changing the world around us redistributing value in a fair and decentralized way. The island’s barter economy is holding back progress. We want to disrupt the economy by introducing a novel cryptographic currency - IslandCoin.
The consensus algorithm for IslandCoin is based on a consortium of 4 members [H, S, K, J]. It is a permissioned leader-based algorithm that is tolerant to Byzantine behavior  of up to 1/3 of the network. The algorithm requires a majority vote of over 50% of consortium members to approve a block. All members have equal voting rights.
Block time is approximately 24 hours. Blocks are published by the leader which is selected using a round robin mechanism.
[SENDER ADDRESS, NONCE, RECIPIENT ADDRESS, AMOUNT, SIGNATURE]
[BLOCK NUMBER, TRANSACTIONS 1..N, BALANCES 1..4, SIGNATURES 1..4]
[1, , [100,100,100,100], [H, S, K, J]]
 L. Lamport, R. E. Shostak, and M. C. Pease. The byzantine generals problem. ACM, 4(3):382–401, 1982.