Has any research been done about implementing Safecoin on a DAG (directed acyclic graph) similar to IOTA? The cryptocurrency IOTA is divisible with zero transaction fees and suitable for the Internet of Things (IoT).
“Instead of being structured as a sequential chain where blocks are added in regular intervals, the Tangle is based on a DAG (Directed Acyclic Graph). Through this, IOTA is able to achieve high transaction throughput (by parallelizing validation) and no transaction fees on transactions. As the Tangle grows and more participants make transactions, the overall system becomes more secure and faster, with confirmation times / transaction finality going down.” – https://learn.iota.org/faq/how-is-iota-different-from-blockchain
One drawback with IOTA is that the senders of transactions have to do their own proof of work (PoW). Is it possible to implement Safecoin on a DAG without the need for proof of work? That would solve the divisibility problem and without the need for PoW make Safecoin superior to IOTA.
Here recent IOTA transactions are listed showing a wide range of divisibility: https://iotasear.ch/