A few months ago, Polymath one of the most reputable security token offering platforms decided to move its Polymesh Blockchain platform from Ethereum to Parity Substrate, a platform that was developed by Parity Applied Sciences that is owned by Gavin Wooden, who was Ethereum’s co-founder.

This came just a few months after introducing Polymesh, which is a security token specific blockchain. Polymesh was initially built on Ethereum and Polymath had also gone ahead and built an SDK (a suite of developer tools for security token issuers and white-labellers) that want to issue security tokens on Ethereum.

Reason for migrating

The main reason for the fallout is the fact that Ethereum uses proof-of-work (PoW) consensus mechanism, which does not go well with security tokens, though it plans to upgrade to proof-of-stake (PoS).

Adam Dossa, the head of Polymath’s blockchain, had earlier stated in a telephone interview that though Ethereum has some great attributes, the world of regulated security tokens is quite different from that of Ethereum. Dossa was quick to identify that PoW posses a serious problem known as block reorgs where blocks of data containing transaction information can be rolled again to annul a disputed transaction.

Dossa also touched on the way Ethereum settles transactions, saying that since it uses mining to settle its transactions and miners can operate from any location in the world, establishments dealing with securities could be scrutinized by authorities if the charges paid to the miners are traced to a nation that is already sanctioned.

What did the migration mean?

By changing the platform on which its products are built on, Polymath decided to embark on a journey to migrate its ST20 security token development standard, which was initially constructed through Ethereum’s ERC-1400 token standard, to Parity Substrate. Besides, Polymath also had to migrate its token, the POLY (which is an ERC-20 token) from Ethereum to Parity Substrate.

Adam Dossa, however, stated via an email that they shall maintain a bridge for the POLY token for at least one year.

On their part, Parity agreed to develop a sure business-logic option on the base layer of Ploymesh. It shall also construct decent runtime and contract communication modules.

Why Substrate?

The head of Polymath’s blockchain stated that other candidates had been considered before settling on Substrate. One of the Candidates was Hyperledger Cloth among others.

However, Dossa described Parity Substrate as a “modular, versatile framework”. He also pointed out that it is simple to construct good contracts from the bottom up on Substrate, which is a great thing for Polymesh.

Parity Substrate has offered solutions to a number of consensus mechanisms in the past, some of which are even customized. Also, transactions performed via Substrate are final and cannot be undone.

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