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The role of History Nodes in the COTI network


Successful payment systems are equipped to process approximately one billion transactions per year. In the cryptocurrency world, the average transaction size is 0.2–5.0 kb, depending on the system type. This means that after one year, a successful cryptocurrency payment system will have terabytes of transaction data to store.

For example, Bitcoin’s full node data size exceeds 230 gigabytes, although Bitcoin has almost 100 times less operations than payment systems like PayPal, Amazon Pay, and Visa.

Cryptocurrency systems address this problem in various ways:

COTI’s History Node solution

COTI’s History Node solution offers a number of unique features, including reliability, decentralization, and usability.

COTI History Nodes maintain all aspects of transaction data storage and retrieval in the COTI network. This service can be provided by a single powerful node using industrial-grade servers, although better reliability can be yielded from distributed solutions like Elasticsearch.

Main use cases for History Nodes:

Designing reliable History Nodes presents a set of challenges. The following features will be provided:

Without taking maliciousness into consideration:

Taking maliciousness into consideration:

At the network maturity stage, COTI History Nodes will use a consensus mechanism to meet all the above requirements.

Elasticsearch integration:

History Nodes can be classified into two clusters:

The launch of COTI’s History Nodes is a major milestone that enables users to run Full Nodes in the COTI network. They are currently live in TestNet and will be implemented in the MainNet by the end of October 2019. Join us in our Telegram group for all future updates and tech developments.



COTI is a DAG-based Layer 1, specifically designed for Enterprises. COTI meets the challenges of both CeFi and DeFi by introducing a new type of DAG-based base protocol that is scalable, fast, private, inclusive and low cost.

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COTI is a DAG-based Layer 1, specifically designed for Enterprises. COTI’s Protocol is scalable, fast, private, inclusive, low cost and is optimized for finance