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Frequently asked questions

Here you will find the most frequently asked questions about RSK, its vision, technology and other aspects

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What is RSK?

RSK is the first general purpose smart contract platform secured by the Bitcoin Network.

What is a smart contract?

Smart contracts are contracts whose terms are encoded in  computer language instead of legal language. Smart contracts can be executed by a computing network such as RSK, so that the terms of the contracts are automatically enforced by a protocol that all nodes in the network follow.

A smart contract can be fully autonomous if all the objects referred (such as currency, payments, obligations, property titles, assets, licenses) have a digital representation in the platform. When there is no such digital representation for an object, a smart contract can also refer to itself and react to changes in its state though special gateway nodes called oracles -that provide external information to the blockchain. A smart contract also has access to time with minute precision, so time-restricted conditions can be represented.


A few examples of smart contracts are:


Distributed voting systems

Machine to machine payments

Decentralized exchanges

Asset tokenization

Supply chain tracking

Loyalty and rewards



Property registry

Escrow services

Transparent public tenders


What is RSK’s vision?

There’s more than three billion people in the world with poor or no access to the basic financial services necessary to participate and thrive in our society. Bitcoin was created to provide individuals with economic freedom and in our vision also set the foundation for the construction of new Internet for the transfer of value. RSK Smart Contract Network was created as means to bring this vision to life and enable prosperity and equality around the world.


What is the current state of the project?

RSK MainNet network was released in early January 2018. The latest major version is called Orchid. All the necessary project information plus the “getting started” guide can be found at our GitHub repository.

Does the RSK blockchain mint new coins?

No. The RSK platform uses Bitcoin as its native currency. A 2-Way Peg between Bitcoin blockchain and RSK blockchain ensures a fixed conversion between BTC and RBTC. (1 RBTC = 1 BTC). There can’t be pre-mining, minting, nor coin inflation on RSK.

How many RBTC can exists at any given time?

The number of RBTC in existence is limited by the same Bitcoin issuance curve. Bitcoin issuance is algorithmically set, and halves every 4 years. There will never be more than 21M bitcoins circulating. Also the number RBTC in RSK is limited by the amount of BTC locked in the two-way-peg.

How many transactions per second are allowed today on RSK?

The number of transactions per second you can currently execute on RSK is determined by the block gas limit and the average block rate. The current average block rate is one block every 30 seconds. At each mined block, the miner can vote to increase the block gas limit. Currently the block gas limit is 6.8M gas units per block. A simple RBTC transfer transaction consumes 21K gas, so currently RSK can perform 11 transactions/sec. This limit could be lifted in the future as there are several community proposals of technologies that lower the resources required to process the blockchain.

For example,RSKIP04 enables parallel processing of transactions. If the proposal is accepted by the community, the block gas limit could easily double.

The LTCP protocol, described in a white-paper and in RSKIP53, and the shrinking-chain scaling technique provide, for some transactions, a ten fold space reduction.

If these proposals are accepted by the community, we may expect the transaction volume to reach 100 tx/s.

How many transactions per second will RSK Network withstand?

There are many factors that influence the number of simple transactions the network can withstand, such as active users, type of transactions, payment patterns. We’ve successfully tested beta releases of improved RSK nodes to accomodate 100 tx/s without trouble. As technology improves, this number will also grow. RSK Labs goal is to reach up to 20,000 tx/sec using its Lumino technology, which is a second layer off-chain payment network that will be embedded on RSK’s reference node in a following release.

What is the transaction confirmation time?

On average, the network currently generates a block every 30 seconds. Miners can reduce the average block time to 15 seconds by optimizing their merge-mining operations. Applications should wait at least 12 confirmations to accept a payment, which corresponds to an average delay of 6 minutes.

Is RSK compatible with Ethereum?

RSK is highly compatible with Ethereum at various different layers: the execution virtual machine (EVM), the javascript programming interface (web3), node interprocess connectivity (JSON-RPC),  and the smart-contract programming languages (Solidity).

RSK VM is highly compatible with the EVM, but the RSKVM offers additional features not present in the EVM. To making use of these improvements, some changes to the smart contracts source code are required. Also the RSKVM has specific precompiled contracts that provide the bridging functionality with Bitcoin. Approximately once a year Ethereum performs a hard-fork to add new functionality. The RSK community has, in the past, included such new functionality on hard-forking releases of RSK. We expect this trend to continue in the future.

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