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Suggest adding custom features to Gson for LocalDateTime and LocalDate #18

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bugSomething isn't working enhancementNew feature or request
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@marklee1972

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Since use com.google.gson.Gson to parse the json of Etherscan's api response.
However the error will appear:
io.api.etherscan.error.ParseException: Unable to make field private final java.time.LocalDate java.time.LocalDateTime.date accessible: module java.base does not "opens java.time" to unnamed module @38d8f54a

The reason is at:
io.api.etherscan.core.impl.BasicProvider

Line 47:
this.gson = new Gson();

I change the below code to fix this issuse:

this.gson = new GsonBuilder()
 .registerTypeAdapter(LocalDateTime.class, (JsonSerializer<LocalDateTime>) (src, typeOfSrc, context) -> new JsonPrimitive(src.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))))
 .registerTypeAdapter(LocalDate.class, (JsonSerializer<LocalDate>) (src, typeOfSrc, context) -> new JsonPrimitive(src.format(DateTimeFormatter.ofPattern("yyyy-MM-dd"))))
 .registerTypeAdapter(LocalDateTime.class, (JsonDeserializer<LocalDateTime>) (json, type, jsonDeserializationContext) -> {
 String datetime = json.getAsJsonPrimitive().getAsString();
 return LocalDateTime.parse(datetime, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
 }).registerTypeAdapter(LocalDate.class, (JsonDeserializer<LocalDate>) (json, type, jsonDeserializationContext) -> {
 String datetime = json.getAsJsonPrimitive().getAsString();
 return LocalDate.parse(datetime, DateTimeFormatter.ofPattern("yyyy-MM-dd"));
 }).create();

Maybe the best way is either update the source code or supply a custom features.

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