# On-chain supply

The number of tokens a stablecoin's smart contract reports as existing, read directly from the public blockchain. ReserveBeat measures supply from each token's Ethereum contract through its standard total-supply interface, across a quorum of independent RPC providers, and records the block and time of every measurement it publishes.

## Sources

- [ERC-20 token standard (EIP-20)](https://eips.ethereum.org/EIPS/eip-20)
- [ReserveBeat measurement methodology](https://reservebeat.com/methodology)

## Disclaimer

ReserveBeat renders figures from issuer-published reports and public blockchains, verbatim and at their stated scope. It is not an auditor, makes no attestation, and states no opinion on any issuer's solvency. Nothing here is investment, trading, legal, tax, or accounting advice. No figure published here is a recommendation to hold, buy, sell, or redeem any token.

Tracked tokens are subjects of public data: supply figures are read from their public Ethereum contracts, and composition figures from the issuers' own published attestation reports. No tracked issuer is a customer and none has endorsed this site.

Source: https://reservebeat.com/learn/on-chain-supply