ACP-226: add initial delay excess (#4300)

ceyonur · Copilot · web-flow · commit 24aa8901931e · 2025-09-19T18:14:58.000Z
Signed-off-by: Ceyhun Onur &lt;ceyhunonur54@gmail.com&gt;
Signed-off-by: Ceyhun Onur &lt;ceyhun.onur@avalabs.org&gt;
Co-authored-by: Copilot &lt;175728472+Copilot@users.noreply.github.com&gt;
diff --git a/vms/evm/acp226/acp226.go b/vms/evm/acp226/acp226.go
@@ -21,6 +21,10 @@ const (
 	// MaxDelayExcessDiff (Q) is the maximum change in excess per update
 	MaxDelayExcessDiff = 200
 
+	// InitialDelayExcess represents the initial (≈2000ms) delay excess.
+	// Formula: ConversionRate (2^20) * ln(2000) + 1
+	InitialDelayExcess = 7_970_124
+
 	maxDelayExcess = 46_516_320 // ConversionRate * ln(MaxUint64 / MinDelayMilliseconds) + 1
 )
 
diff --git a/vms/evm/acp226/acp226_test.go b/vms/evm/acp226/acp226_test.go
@@ -49,8 +49,8 @@ var (
 			delay:  1000,
 		},
 		{
-			name:   "2000ms_delay",
-			excess: 7_970_124, // ConversionRate (2^20) * ln(2000) + 1
+			name:   "2000ms_delay_initial",
+			excess: InitialDelayExcess, // ConversionRate (2^20) * ln(2000) + 1
 			delay:  2000,
 		},
 		{

Original file line number	Diff line number	Diff line change
`@@ -21,6 +21,10 @@ const (`
`21`	`21`	`// MaxDelayExcessDiff (Q) is the maximum change in excess per update`
`22`	`22`	`MaxDelayExcessDiff = 200`
`23`	`23`
	`24`	`+ // InitialDelayExcess represents the initial (≈2000ms) delay excess.`
	`25`	`+ // Formula: ConversionRate (2^20) * ln(2000) + 1`
	`26`	`+ InitialDelayExcess = 7_970_124`
	`27`	`+`
`24`	`28`	`maxDelayExcess = 46_516_320 // ConversionRate * ln(MaxUint64 / MinDelayMilliseconds) + 1`
`25`	`29`	`)`
`26`	`30`
Original file line number	Diff line number	Diff line change
`@@ -49,8 +49,8 @@ var (`
`49`	`49`	`delay: 1000,`
`50`	`50`	`},`
`51`	`51`	`{`
`52`		`- name: "2000ms_delay",`
`53`		`- excess: 7_970_124, // ConversionRate (2^20) * ln(2000) + 1`
	`52`	`+ name: "2000ms_delay_initial",`
	`53`	`+ excess: InitialDelayExcess, // ConversionRate (2^20) * ln(2000) + 1`
`54`	`54`	`delay: 2000,`
`55`	`55`	`},`
`56`	`56`	`{`