> For the complete documentation index, see [llms.txt](https://docs.creditcoin.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.creditcoin.org/usc/creditcoin-oracle-subsystems/readability.md).

# Readability

Readability allows Creditcoin users and contracts to read the state of any source chain. Readability relies on two key steps:\
1\. Attestation - Pro-actively tracking and reaching consensus on the state changes of source blockchains.\
2\. Transaction Proving - Once a user/builder has decided they want to read a piece of source chain data, the transaction containing that data must be proven. To save on-chain compute, we generate proofs off-chain then verify them on-chain. Then data from the proven transaction can be used to by smart contracts on Creditcoin.

With these two steps, Creditcoin contracts can connect to many previously isolated pools of data and liquidity.<br>


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