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Oct 10, 2026
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Docs: retry applyCode once on network/timeout #8

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Docs: retry applyCode once on network errors
cursoragent Oct 10, 2026
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Docs: only attach Try again after network retry fails
cursoragent Oct 10, 2026
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109 changes: 60 additions & 49 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -50,62 +50,73 @@ TapAppLink.setAppUserId(Purchases.sharedInstance.appUserID) { }

### Apply a discount code

Show success only on a real success result. Map each outcome to UI like this:
Show success only on a real success result. Map each outcome to UI like this. On a network or timeout error only (never unknown, inactive or wrongEnvironment), retry `applyCode` once automatically with the same code. From 0.3.2 that retry is safe because the SDK reuses its request ID, so the server won't count the install twice.

```kotlin
TapAppLink.applyCode(code) { result ->
result.onSuccess { body ->
val offer = TapAppLink.getOffer()
val offerLine = offer?.let { "${it.creatorName}'s offer" }
if (body.optBoolean("alreadyAttributed")) {
// "You're all set" — hide the code; show offerLine if any.
showStatus(title = "You're all set", codeVisible = false, hint = offerLine)
} else {
// "Code applied" — show the code; show offerLine if any.
showStatus(title = "Code applied", codeVisible = true, code = code, hint = offerLine)
}
}.onFailure { error ->
when (error) {
is TapAppLinkRedeemException.UnknownCode -> {
showStatus(
title = "We don't recognise that code. Check it and try again.",
hint = "Codes aren't case sensitive.",
)
}
is TapAppLinkRedeemException.InactiveCode -> {
showStatus(
title = "This code is no longer active.",
hint = "You can still subscribe at the regular price.",
)
}
is TapAppLinkRedeemException.WrongEnvironment -> {
// Same customer copy as unknownCode. Never say "environment" to customers.
Log.w(TAG, TapAppLinkRedeemException.WrongEnvironment.DEVELOPER_WARNING)
showStatus(
title = "We don't recognise that code. Check it and try again.",
hint = "Codes aren't case sensitive.",
)
fun redeem(code: String, isRetry: Boolean = false) {
TapAppLink.applyCode(code) { result ->
result.onSuccess { body ->
val offer = TapAppLink.getOffer()
val offerLine = offer?.let { "${it.creatorName}'s offer" }
if (body.optBoolean("alreadyAttributed")) {
// "You're all set" — hide the code; show offerLine if any.
showStatus(title = "You're all set", codeVisible = false, hint = offerLine)
} else {
// "Code applied" — show the code; show offerLine if any.
showStatus(title = "Code applied", codeVisible = true, code = code, hint = offerLine)
}
is TapAppLinkRedeemException.Network -> {
showStatus(
title = "We couldn't check your code. Check your connection and try again.",
)
}
is TapAppLinkRedeemException.Other -> {
Log.w(TAG, "applyCode failed status=${error.status} message=${error.message}")
showStatus(
title = "We couldn't check your code. Check your connection and try again.",
)
}
else -> {
Log.w(TAG, "applyCode failed", error)
showStatus(
title = "We couldn't check your code. Check your connection and try again.",
)
}.onFailure { error ->
when (error) {
is TapAppLinkRedeemException.UnknownCode -> {
showStatus(
title = "We don't recognise that code. Check it and try again.",
hint = "Codes aren't case sensitive.",
)
}
is TapAppLinkRedeemException.InactiveCode -> {
showStatus(
title = "This code is no longer active.",
hint = "You can still subscribe at the regular price.",
)
}
is TapAppLinkRedeemException.WrongEnvironment -> {
// Same customer copy as unknownCode. Never say "environment" to customers.
Log.w(TAG, TapAppLinkRedeemException.WrongEnvironment.DEVELOPER_WARNING)
showStatus(
title = "We don't recognise that code. Check it and try again.",
hint = "Codes aren't case sensitive.",
)
}
is TapAppLinkRedeemException.Network -> {
if (!isRetry) {
// Automatic retry once on network/timeout only.
redeem(code, isRetry = true)
} else {
showStatus(
title = "We couldn't check your code. Check your connection and try again.",
actionLabel = "Try again",
onAction = { redeem(code) },
)
}
}
is TapAppLinkRedeemException.Other -> {
Log.w(TAG, "applyCode failed status=${error.status} message=${error.message}")
showStatus(
title = "We couldn't check your code. Check your connection and try again.",
)
}
else -> {
Log.w(TAG, "applyCode failed", error)
showStatus(
title = "We couldn't check your code. Check your connection and try again.",
)
}
}
}
}
}

redeem(code)
```

`TapAppLinkRedeemException.WrongEnvironment.DEVELOPER_WARNING` is exactly:
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