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Web3Call added for uniswap broadcasts
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62 changes: 62 additions & 0 deletions
62
dapp/src/main/java/com/alphawallet/dapp/listeners/Web3EthCall.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| package com.alphawallet.dapp.listeners | ||
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| import com.alphawallet.dapp.utils.toJSONObjectOrNull | ||
| import okhttp3.* | ||
| import okhttp3.MediaType.Companion.toMediaTypeOrNull | ||
| import okhttp3.RequestBody.Companion.toRequestBody | ||
| import java.io.IOException | ||
| import java.util.concurrent.TimeUnit | ||
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| class Web3EthCall(val callback: Callback) { | ||
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| interface Callback { | ||
| fun onCallSuccessful(callbackId: Int, out: String) | ||
| fun onCallFailure(callbackId: Int, throwable: Throwable) | ||
| } | ||
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| private val client = OkHttpClient.Builder().connectTimeout(20, TimeUnit.SECONDS) | ||
| .callTimeout(20, TimeUnit.SECONDS).build() | ||
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| var fromAddress: String = "" | ||
| var rpcUrl: String = "" | ||
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| fun ethCall(callbackId: Int, toAddress: String, payload: String) { | ||
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| val postJsonBody = """ | ||
| {"jsonrpc":"2.0","method":"eth_call","params":[{"from": "$fromAddress", "to": "$toAddress", "data": "$payload"}, "latest"], "id":1} | ||
| """.trimIndent() | ||
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| val body: RequestBody = postJsonBody.toRequestBody("application/json".toMediaTypeOrNull()) | ||
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| val request: Request = Request.Builder() | ||
| .url(rpcUrl) | ||
| .post(body) | ||
| .build() | ||
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| client.newCall(request).enqueue(object : okhttp3.Callback { | ||
| override fun onFailure(call: Call, e: IOException) { | ||
| callback.onCallFailure(callbackId, e) | ||
| } | ||
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| override fun onResponse(call: Call, response: Response) { | ||
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| val jsonResponse = response.body?.string() | ||
| val json = jsonResponse?.toJSONObjectOrNull() | ||
| val result = json?.optString("result") | ||
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| if (!response.isSuccessful || result == null) { | ||
| callback.onCallFailure( | ||
| callbackId, | ||
| RuntimeException("Http Response Not Successful or result is null ") | ||
| ) | ||
| return | ||
| } | ||
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| callback.onCallSuccessful(callbackId, result) | ||
| } | ||
| }) | ||
| } | ||
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| } |
12 changes: 12 additions & 0 deletions
12
dapp/src/main/java/com/alphawallet/dapp/utils/JSONExtensions.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,12 @@ | ||
| package com.alphawallet.dapp.utils | ||
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| import org.json.JSONObject | ||
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| fun String.toJSONObjectOrNull() : JSONObject? { | ||
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| return try { | ||
| JSONObject(this) | ||
| } catch (t : Throwable) { | ||
| null | ||
| } | ||
| } |