What Is an Atomic Swap?

An atomic swap is an exchange of cryptocurrencies from separate blockchains. The swap is conducted between two entities without a third party’s involvement. The idea is to remove centralized intermediaries like regulated exchanges and give token owners total control.

The term atomic derives from the term “atomic state” in which a state has no substates; it either happens or it doesn’t—there is no other alternative. This refers to the state of the cryptocurrency transaction; it happens or it doesn’t.

Most atomic swap-enabled wallets and blockchains use smart contracts. Smart contracts are programs within blockchains that execute when certain conditions are met. In this case, the conditions are that each party agrees to the transaction before a timer runs out. Using a smart contract in the trade prevents either party from stealing a cryptocurrency from the other.

Atomic swaps are also called cross-chain atomic swaps.

Understanding Atomic Swaps

Each cryptocurrency is supported by a blockchain, designed only to accept transactions in specific tokens. For example, Bitcoin (BTC) has a blockchain, and ETH (ether) has another. You cannot easily exchange BTC and ETH without first converting to fiat currency then buying the other; another technique is to convert between cryptocurrencies and exchanges multiple times to get the one you want. Atomic swaps allow you to exchange tokens from different blockchains in one trade.

Decentralized exchanges can conduct atomic swaps for you. A decentralized exchange (DEX) has no central authority regulating it; it is a platform you can trade on without third parties. You can also choose from cross-chain swap providers, where you transfer your digital assets into another wallet, conduct the swap, and transfer them back out.

History of Atomic Swaps

The concept was conceived shortly after altcoins—cryptocurrencies other than Bitcoin—materialized. The creation of altcoins meant some cryptocurrency owners became interested in moving capital between coins. This type of token swap first appeared in September 2017, when an atomic swap between Decred and Litecoin was conducted.

Since then, startups and decentralized exchanges have implemented swaps and allowed users the same facility. For example, Lightning Labs, a startup that uses Bitcoin’s lightning network for transactions, has conducted off-chain swaps utilizing the technology.

Special cryptocurrency wallets have also been developed that are capable of cross-chain atomic swaps—Liquality has developed a wallet that will swap Bitcoin, ETH, and more.

Atomic Swap Process

In an atomic swap, two token owners agree to exchange their tokens for any amount they agree on. The smart contract program sees that they both agreed to it, so it executes the trade for them. The transaction is recorded in the blockchain and validated by the network nodes, and then a new block is opened for another transaction.

The transaction cannot be reversed. Both parties must agree to another transaction to exchange the tokens again if they would like them back.

Atomic swaps use Hash Timelock Contracts (HTLC) to automate the exchange of tokens. As its name denotes, HTLC is a time-bound smart contract between parties that involves generating one cryptographic hash on each end.

HTLC requires both parties to acknowledge receipt of funds within a specified timeframe. If one party fails to confirm the transaction within the timeframe, then the entire transaction is voided, and funds are returned. This eliminates counterparty risk, or the risk that one party will accept the offered coins and decline the transfer of their coins.

For instance, suppose Jane wants to convert 1 BTC to an equivalent number of Litecoins with John. She submits the transaction through an atomic swap-capable wallet. A cryptographic hash function generates a hex number to encrypt the transaction during this process. The process is repeated at John’s end.

Both Jane and John unlock their respective funds using their encrypted numbers. They have to do this within a specified timeframe, or the transfer will not occur. The HTLC within the blockchains then executes the trade.

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What Is the Asian Infrastructure Investment Bank (AIIB)?

The Asian Infrastructure Investment Bank (AIIB) is a new international development bank that provides financing for infrastructure projects in Asia. It began operations in January 2016.

How the Asian Infrastructure Investment Bank (AIIB) Works

The Asian Infrastructure Investment Bank (AIIB) is a multilateral development bank headquartered in Beijing. Like other development banks, its mission is to improve social and economic outcomes in its region, Asia, and beyond. The bank opened in January 2016 and now has 105 approved members worldwide, as of Jul. 30, 2022.

The History of the Asian Infrastructure Investment Bank

China’s leader Xi Jinping first proposed an Asian infrastructure bank at an APEC summit in Bali in 2013. Many observers have interpreted the bank as a challenge to international lending bodies, which some consider too reflective of American foreign policy interests such as the International Monetary Fund (IMF), the World Bank and the Asian Development Bank.

In this bank’s case, China controls half of the bank’s voting shares, which gives the perception that the AIIB will function in the interests of the Chinese government. The U.S. has questioned the bank’s governing standards and its social and environmental safeguards, perhaps pressuring allies not to apply for membership. However, despite American objections, approximately half of NATO has signed on, as has nearly every large Asian country, with the exception of Japan. The result is widely considered in an indicator of China’s growing international influence at the expense of the United States.

The Structure of the Asian Infrastructure Investment Bank

The bank is headed by a Board of Governors composed of one Governor and one Alternate Governor appointed by each of the 86 member countries. A non-resident Board of Directors is responsible for the direction and management of the Bank such as the Bank’s strategy, annual plan and budget and establishing policies and oversight procedures.

The bank staff is headed by a President who is elected by AIIB shareholders for a five-year term and is eligible for re-election once. The President is supported by Senior Management including five Vice Presidents for policy and strategy, investment operations, finance, administration, and the corporate secretariat and the General Counsel and Chief Risk Officer. Mr. Jin Liqun is the current President.

Asian Infrastructure Investment Bank Priorities

The bank’s priorities are projects that promote sustainable Infrastructure and to support countries that are striving to meet environmental and development goals. The bank funds projects linking countries in the region and cross-border infrastructure projects for roads, rail, ports, energy pipelines and telecoms across Central Asia and maritime routes in South East and South Asia and the Middle East. The bank’s priorities also include private capital mobilization and encouraging partnerships that stimulate private capital investment such as those with other multilateral development banks, governments, and private financiers.

An example of an AIIB project is a rural road connectivity initiative that will benefit approximately 1.5 million rural residents in Madhya Pradesh, India. In April 2018, the AIIB announced the project, which is also expected to improve the livelihoods, education, and mobility of the residents of 5,640 villages. The project is a U.S. $140-million jointly financed by the AIIB and the World Bank.