contract.mu

#define DIFF 1
#define ETH_START_B 2
#define SEED 3
#define JEFF 0

#define BLOCK_F 254
#define BLOCK_N 253
#define ADDR_START 1000

// JeffCoin Genesis :)
contract.storage[BLOCK_N] = 0 
// Set the initial number (so we can track block changes)
contract.storage[ETH_START_B] = block.number()
contract.storage[SEED] = 0
contract.storage[DIFF] = 3
contract.storage[JEFF] = tx.sender()

return compile {
	if tx.sender() == contract.storage[JEFF] {
		if this.data[0] == "die" {
			suicide(contract.storage[JEFF])
		}
	}

	var diff = contract.storage[DIFF]

	var[2] ndat
	ndat[0] = this.data[0]
	ndat[1] = contract.storage[SEED]

	var nonce = sha3(ndat, sizeof(ndat))

	// Check if the mined nonce is correct
	for i := 0; i < diff; i++ {
		if byte(nonce, i) != 0 {
			stop() // invalid nonce
		}
	}

	var blockNo = contract.storage[BLOCK_N]
	// Amount of blocks found for the block (used to determine the difficulty)
	contract.storage[BLOCK_F + blockNo] = contract.storage[BLOCK_F + blockNo] + 1
	// Change the seed
	contract.storage[SEED] = contract.storage[SEED] + 1

	// Reward 1000 JeffCoin to the miner
	contract.storage[ADDR_START + tx.sender()] = contract.storage[ADDR_START + tx.sender()] + 100000

	// Check if we need to increase the difficulty
	if contract.storage[ETH_START_B] < block.number() {
		// TODO update difficulty
	}
}