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The core package for the Elixium blockchain, containing all the modules needed to run the chain
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lib/blockchain.ex
defmodule Elixium.Blockchain do
alias Elixium.Blockchain.Block
alias Elixium.Store.Ledger
alias Elixium.Store.Utxo
@target_blocktime 120
@diff_rebalance_offset 10_080
@moduledoc """
Wrapper functions for interacting with the blockchain on a high level
"""
@doc """
Creates a List with a genesis block in it or returns the existing blockchain
"""
def initialize do
if Ledger.empty?() do
add_block(Block.initialize())
else
Ledger.retrieve_chain()
end
end
@doc """
Adds the latest block to the beginning of the blockchain
"""
@spec add_block(Block) :: none
def add_block(block) do
Ledger.append_block(block)
Utxo.update_with_transactions(block.transactions)
end
def recalculate_difficulty do
count = Ledger.count_blocks() - 1
if count >= @diff_rebalance_offset - 1 do
{:ok, last_time, _} = DateTime.from_iso8601(Ledger.last_block.timestamp)
{:ok, first_time, _} =
count
|> min(@diff_rebalance_offset - 1)
|> Ledger.block_at_height()
|> IO.inspect
|> (&(&1.timestamp)).()
|> DateTime.from_iso8601()
diff = DateTime.diff(last_time, first_time, :microseconds) / 1_000_000
avg_secs_per_block = diff / @diff_rebalance_offset
speed_ratio = @target_blocktime / avg_secs_per_block
:math.log(speed_ratio) / :math.log(16)
else
0
end
end
def diff_rebalance_offset, do: @diff_rebalance_offset
end