ETA adjustments (#672)

* add 5 sec of padding to ETAs for guardian network

* raise Ethereum finality threshold

Author: artursapek

connect/src/protocols/cctp/cctpTransfer.ts

@@ -1,5 +1,5 @@
 import type { Chain, Network } from "@wormhole-foundation/sdk-base";
-import { circle, encoding, finality, toChain } from "@wormhole-foundation/sdk-base";
+import { circle, encoding, finality, guardians, toChain } from "@wormhole-foundation/sdk-base";
 import type {
   Attestation,
   AttestationId,
@@ -592,7 +592,7 @@ export namespace CircleTransfer {
 
     // https://developers.circle.com/stablecoins/docs/required-block-confirmations
     const eta =
-      srcChain.chain === "Polygon" ? 2_000 * 200 : finality.estimateFinalityTime(srcChain.chain);
+      (srcChain.chain === "Polygon" ? 2_000 * 200 : finality.estimateFinalityTime(srcChain.chain)) + guardians.guardianAttestationEta;
     if (!transfer.automatic) {
       return {
         sourceToken: { token: srcToken, amount: transfer.amount },

connect/src/protocols/tokenBridge/tokenTransfer.ts

@@ -1,5 +1,5 @@
 import type { Chain, Network } from "@wormhole-foundation/sdk-base";
-import { amount, encoding, finality, toChain as toChainName } from "@wormhole-foundation/sdk-base";
+import { amount, encoding, finality, guardians, toChain as toChainName } from "@wormhole-foundation/sdk-base";
 import type {
   AttestationId,
   AutomaticTokenBridge,
@@ -717,7 +717,7 @@ export namespace TokenTransfer {
     const dstDecimals = await dstChain.getDecimals(dstToken.address);
     const dstAmountReceivable = amount.scale(srcAmountTruncated, dstDecimals);
 
-    const eta = finality.estimateFinalityTime(srcChain.chain);
+    const eta = finality.estimateFinalityTime(srcChain.chain) + guardians.guardianAttestationEta;
     if (!transfer.automatic) {
       return {
         sourceToken: {

core/base/src/constants/finality.ts

@@ -26,7 +26,7 @@ export const safeThreshold = constMap(safeThresholds);
 // Number of blocks before a transaction is considered "final"
 const finalityThresholds = [
   ["Solana",   32],
-  ["Ethereum", 64],
+  ["Ethereum", 96],
   ["Bsc",      15],
   // Checkpointed to L1 after ~512 blocks
   ["Optimism",  512],

core/base/src/constants/guardians.ts

@@ -38,3 +38,7 @@ export const guardianKeyToName = constMap(guardianKeyAndNameEntries, [1, [0, 2]]
 
 export const devnetGuardianPrivateKey =
   "cfb12303a19cde580bb4dd771639b0d26bc68353645571a8cff516ab2ee113a0";
+
+// Number of seconds we expect to wait for attestation
+// Used for eta calculation in route code
+export const guardianAttestationEta = 5;