Add or Switch Network
Request
Leveraging EIP-3085, HyperPlay can pass requests to add a custom network, or switch to the appropriate network, for the user's MetaMask or WalletConnect wallet.
Network information, including a directory of public RPC endpoints, can be found here.
curl --location --request POST "localhost:9680/rpc" \
--header 'Content-Type: application/json' \
--data-raw '{
"request":{
"method":"eth_accounts"
},
"chain":{
"chainId":"137",
"chainMetadata":{
"chainName":"Polygon",
"nativeCurrency":{
"name":"MATIC",
"symbol":"MATIC",
"decimals":18
},
"rpcUrls":[
"https://polygon-rpc.com"
]
}
}
}'using System.Collections;
using UnityEngine;
using UnityEngine.Networking;
public class SwitchNetwork : MonoBehaviour
{
void Start()
{
StartCoroutine(Switch());
}
private IEnumerator Switch()
{
string jsonString = "{\"request\":{\"method\":\"eth_accounts\"},\"chain\":{\"chainId\":\"137\",\"chainMetadata\":{\"chainName\":\"Polygon\",\"nativeCurrency\":{\"name\":\"MATIC\",\"symbol\":\"MATIC\",\"decimals\":18},\"rpcUrls\":[\"https://polygon-rpc.com\"]}}}";
byte[] jsonBytes = System.Text.Encoding.UTF8.GetBytes(jsonString);
UnityWebRequest request = new UnityWebRequest("localhost:9680/rpc", "POST");
request.uploadHandler = new UploadHandlerRaw(jsonBytes);
request.downloadHandler = new DownloadHandlerBuffer();
request.SetRequestHeader("Content-Type", "application/json");
yield return request.SendWebRequest();
Debug.Log(request.error);
Debug.Log(request.downloadHandler.text);
}
}
Copy and paste the following to add a GetAccounts node with chainId 56 (Binance Smart Chain).
Begin Object Class=/Script/BlueprintGraph.K2Node_AsyncAction Name="K2Node_AsyncAction_8"
ProxyFactoryFunctionName="GetAccounts"
ProxyFactoryClass=Class'"/Script/web3Unreal.GetAccounts"'
ProxyClass=Class'"/Script/web3Unreal.GetAccounts"'
NodePosX=-192
NodePosY=1440
ErrorType=3
NodeGuid=F50862694C93FD8DA86577BA77C338CC
CustomProperties Pin (PinId=47B93F1E418AA43A3D49B99FBF5B9F5C,PinName="execute",PinToolTip="\nExec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
CustomProperties Pin (PinId=9D0B0C694BF6FCA99B3C5EA298583CA6,PinName="then",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
CustomProperties Pin (PinId=4190722C4FC4A0FD0358A9862D84FF46,PinName="OnResponseOutput",PinFriendlyName="On Response Output",PinToolTip="On Response Output",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
CustomProperties Pin (PinId=144510B04CCC3CE5B0520680134728C9,PinName="SelectedAccount",PinToolTip="Selected Account",Direction="EGPD_Output",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
CustomProperties Pin (PinId=F7B94F664F81B897BCECA1AA958F49DB,PinName="StatusCode",PinToolTip="Status Code",Direction="EGPD_Output",PinType.PinCategory="int",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
CustomProperties Pin (PinId=1E3FC27C43AF33DEA0B890BE8C26AFC6,PinName="WorldContextObject",PinToolTip="World Context Object\nObject Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'"/Script/CoreUObject.Object"',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=True,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
CustomProperties Pin (PinId=ED3BF55E43AF6863E23D3D90868DE83B,PinName="chainId",PinToolTip="Chain Id\nInteger",PinType.PinCategory="int",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="56",AutogeneratedDefaultValue="1",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
CustomProperties Pin (PinId=1A7D552E4D575F299CEFCAB1A21BAC3C,PinName="chainMetadata",PinToolTip="Chain Metadata\nString",PinType.PinCategory="string",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PinType.bIsUObjectWrapper=False,DefaultValue="{\"chainName\": \"Binance Smart Chain\", \"nativeCurrency\": {\"name\": \"Binance Coin\", \"symbol\": \"BNB\", \"decimals\": 18}, \"rpcUrls\": [\"https://bsc-dataseed4.binance.org\"], \"blockExplorerUrls\": [\"https://bscscan.com\"]}",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
End Object
Then copy and paste the following into the Chain Metadata input pin
{"chainName": "Binance Smart Chain", "nativeCurrency": {"name": "Binance Coin", "symbol": "BNB", "decimals": 18}, "rpcUrls": ["https://bsc-dataseed4.binance.org"], "blockExplorerUrls": ["https://bscscan.com"]}#include "Endpoints/GetAccounts.h"
#include "HyperPlayUtils.h"
void OnResponse(FString Response, int32 StatusCode)
{
const bool bWasSuccessful = HyperPlayUtils::StatusCodeIsSuccess(StatusCode);
UE_LOG(LogTemp, Display, TEXT("GetAccounts Success: %s"), bWasSuccessful ? "true" : "false");
UE_LOG(LogTemp, Display, TEXT("GetAccounts Response: %s"), *Response);
}
int main(){
FString chainMetadata("{\"chainId\":\"137\",\"chainMetadata\":{\"chainName\":\"Polygon\",\"nativeCurrency\":{\"name\":\"MATIC\",\"symbol\":\"MATIC\",\"decimals\":18},\"rpcUrls\":[\"https://polygon-rpc.com\"]}}");
UGetAccounts* GetAccountsInstance = UGetAccounts::GetAccounts(nullptr, 137, chainMetadata);
GetAccountsInstance->GetOnCompletedDelegate().AddRaw(this, &OnResponse);
GetAccountsInstance->Activate();
}Response
["0x638105AA1B69406560f6428aEFACe3DB9da83c64"]Errors will have an HTTP response status 500-599
{
"message": "error description here"
}Last updated