linkchain

Make a blockchain like implementation example of chain of links blocks in Deep as a Deep package. Consensus should work without proof of stake or proof of work. We can just sign the block, and it is published to the network. It may be done as simple as possible. Each public key can write to its own channel, but in the process of doing so, it is possible to link data from other channels. It may resemble similar approach as NPM packages. Where package is replaced with block.

Or maybe we should name it `link sequence` or `links sequences`.