Monitoring Transactions for an Address

A common use case for Hashless is retrieving the complete transaction history for an address. This can be for accounting purposes, compliance, forensics, or just to understand another blockchain participant's behavior.

It is difficult to obtain a complete list of transactions for an address -- whether a wallet/EOA or a smart contract address -- from many existing data providers. Often existing solutions only expose transactions that are directly initiated or received by a particular address. For example, individual Uniswap liquidity pool addresses will return only a few transactions when queried this way, despite having potentially hundreds of thousands of trades against their liquidity. This is because the vast majority of Uniswap trades are initiated via either the Uniswap Router contracts or via a third-party liquidity aggregator like 1Inch.

Other solutions expose token or NFT transfers between addresses (using Ethereum log data) but don't make it straightforward to contextualize that transfer. An individual NFT transfer for example could be due to a user gifting the NFT, a free or paid mint, or a marketplace transaction via a protocol like OpenSea or Rarible.

Hashless's Transactions for Address API solves all these problems by indexing based on the granular smart contract interactions that take place during a transaction in addition to asset movements, and then returning the complete, contextualized transaction data.