On-chain settlement
On-chain settlement is the transfer of a token, such as a stablecoin, by a transaction recorded on a public blockchain, which counts as settled once the network treats the block as final. Finality time depends on the chain and on how many confirmations the receiving party requires.
How it works
Each chain reaches finality its own way. Ethereum runs 12-second slots grouped into 32-slot epochs, and a block is finalised once a pair of checkpoints gets votes from at least two-thirds of staked ETH; reverting it would cost an attacker at least one-third of all staked ETH. Tron blocks become irreversible once at least 19 of its 27 Super Representatives have produced blocks on top, typically in about 1 minute.
Receivers set their own thresholds. Circle Mint credits USDC deposits after 12 confirmations on Ethereum (about 3 minutes), 1 on Solana (about 200 milliseconds), 2 to 3 on Polygon PoS (about 8 seconds) and 12 Ethereum blocks for Base (about 3 to 9 minutes). Fewer confirmations mean more exposure to a chain reorganisation.
Settlement on chain cannot be recalled. Circle states it cannot reverse or recall a USDC transaction once initiated, so a wrong address means a lost payment. Treasury teams count a transfer as available cash only once the receiving venue's confirmation count is met, and reconcile it by transaction hash.
Example
A firm sends 1,000,000 USDC on Ethereum to its off-ramp partner at 10:00 UTC. The partner credits after 12 confirmations, about 3 minutes later, and pays out pesos at 10:05. On a chain the partner credits after one confirmation, the same leg completes in under a second, but only if the partner supports that chain.
Frequently asked questions
Is on-chain finality the same as RTGS finality?
No. RTGS finality is set by system rules and law backed by a central bank. Each blockchain defines its own point of finality in its protocol, and receivers add their own confirmation rules.
Can an on-chain payment be recalled?
No. Circle states USDC transfers are irreversible. Getting funds back depends on the recipient returning them.
Where Polynopsis fits
Polynopsis keeps a stablecoin transfer in flight until it is confirmed on chain and credited, so the position never counts it as usable early.
Compared with
Related terms
Sources
- Proof-of-stake (PoS) · ethereum.org
- Consensus · TRON Developer Hub
- Blockchain confirmations (Circle Mint) · Circle
- USDC risk factors · Circle
Know where all your money is.
Polynopsis gives cross-border payment teams one live position across every bank, payout partner, exchange and wallet, including money in flight, and warns before a corridor runs dry.
About Polynopsis
Polynopsis is liquidity management software for cross-border payment companies. The name joins poly, many, and synopsis, a seeing together: one live view of money spread across many banks, payout partners, exchanges and stablecoin wallets, including money in flight, with a warning before any corridor runs dry.
Why it is called Polynopsis · About Polynopsis · Glossary · Corridor runway calculator