What is Celo?
- Author
- CRYPTO PORT Editorial
- Published
- Updated
- Reading time
- 5 min
In short
Celo was designed around the idea that a smartphone alone should be enough to send and receive crypto. Distinctive features include mapping phone numbers to addresses and letting fees be paid in stablecoins. It began as an independent layer 1 and later migrated to an Ethereum layer 2.
Key points
- Built for phone use, with lightweight verification and simple addressing as design goals
- Gas can be paid in stablecoins as well as the native asset
- Issues its own stablecoins tracking several fiat currencies, such as cUSD
- Ran as an independent layer 1 before migrating to an Ethereum layer 2
Definition
An EVM-compatible network designed primarily for payments from smartphones, with support for paying fees in stablecoins.
Celo assumed users whose only device is a phone, not a computer. Handling long hexadecimal addresses and holding a separate token for gas every time are serious obstacles in that setting, and reducing that friction shaped the design.
One piece is mapping phone numbers to addresses, so a sender can reach a recipient by number rather than by copying an address. Because linking numbers to addresses raises privacy questions, the lookup is done without publishing the numbers themselves.
Another is how fees are paid. Most chains require gas in the native asset, so even sending a stablecoin means first acquiring something else. Celo lets fees be paid in stablecoins such as cUSD, removing that step.
Operationally, the biggest change was migrating from an independent layer 1 to an Ethereum layer 2, putting settlement on Ethereum while keeping low fees and fast confirmation. Reported uses include cross-border remittance, payments denominated in local currencies, and distributing aid and donations.
Watch out for
- · The layer 2 migration changed withdrawal and bridging procedures, so older step-by-step guides may no longer apply
- · Its own stablecoins depend on their collateral design, and a peg can always break
- · Addressing by phone number is convenient but means a changed or hijacked number can affect who receives funds
Frequently asked questions
If transfers work by phone number, can someone take my funds by knowing it?
Knowing your number alone does not let anyone move funds; spending still requires your private key. The number is used to look up a destination, which is separate from control of the assets.