finality

src/SUMMARY.md

@@ -81,3 +81,4 @@
   - [Github](./reference/github.md)
   - [Deployed Contracts](./reference/contracts.md)
   - [RPC Nodes](./reference/rpcnodes.md)
+  - [Blockchain Finality Recommendation](./reference/finality.md)

src/reference/finality.md

@@ -0,0 +1,25 @@
+# Blockchain Finality Recommendations
+
+The goal of Wormhole is to provide high confidence that only _finalized_ messages are observed and attested. Different chains use different consensus mechanisms and so there are different finality assumptions with each one.
+
+Below is a table of suggested finality recommendations for each of the chains supported by the Wormhole ecosystem to have the highest confidence of finality.
+
+However, these are just suggestions and developers are free to define their own finality windows for their applications. Ultimately, the tradeoff is between speed and security.
+
+| Blockchain | Suggested Number of Block Confirmations |
+| ----------- | ----------- |
+| Ethereum | 1 |
+| Binance Smart Chain | 15 |
+| Polygon | 512 |
+| Avalanche | 1 |
+| Oasis | 1 |
+| Aurora | 1 |
+| Fantom | 1 |
+| Karura | 1 |
+| Acala | 1 |
+| Klaytn | 1 |
+| Celo | 1 |
+| Solana | 32 |
+| Terra Class | Instant |
+| Terra 2 | Instant |
+