send transaction using a custom erc-20 token

[racs]

Is it possible to use sendransaction but not for eth but sending matic for example on polygon blockchain?

[michielpost]

The MetaMaskService.cs has a GenericRpc method. With this method you can send any command to the ethereum JavaScript object.

It results in this JavaScript call:

MetaMask.Blazor/MetaMask.Blazor/wwwroot/metaMaskJsInterop.js

Lines 169 to 172 in 72a0016

	var result = await ethereum.request({
	method: method,
	params: params
	});

So yes it's possible. But you need to figure out the code you need to use to send matic or polygon. If these are on other networks, the user needs to select that network in their MetaMask extension.

[racs]

var result = await MetaMaskService.GenericRpc("eth_sendTransaction", parameters);

any idea how to mount the parameters? I have tried lots of combination basically the javascript needs to receive

ethereum
.request({
method: "eth_sendTransaction",
params: [
{
from: SelectedAddress,
to: ContractAddress,
data:
"0xa9059cbb000000000000000000000000e4cc0b4dea52652458d31548643bb90b06af5fa00000000000000000000000000000000000000000000000000b1a2bc2ec50000"
}
]
})

[michielpost]

Hi, I don't have a sample with parameters. Currently on holiday, so can't have a look now. Will try to create a sample later in August.

…

On Thu, 21 Jul 2022 at 21:35, Ricardo Alex ***@***.***> wrote: var result = await MetaMaskService.GenericRpc("eth_sendTransaction", parameters); any idea how to mount the parameters? I have tried lots of combination basically the javascript needs to receive ethereum .request({ method: "eth_sendTransaction", params: [ { from: SelectedAddress, to: ContractAddress, data: "0xa9059cbb000000000000000000000000e4cc0b4dea52652458d31548643bb90b06af5fa00000000000000000000000000000000000000000000000000b1a2bc2ec50000" } ] }) — Reply to this email directly, view it on GitHub <#9 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAKBDEBTLY3I3C6FVMOHUQDVVGQ7NANCNFSM5KP4CBCA> . You are receiving this because you commented.Message ID: ***@***.***>

[michielpost]

If you already have the encoded data, like in your example, you can do this:

 var result = await MetaMaskService.SendTransaction(ContractAddress, weiValue, "0xa9059cbb000000000000000000000000e4cc0b4dea52652458d31548643bb90b06af5fa00000000000000000000000000000000000000000000000000b1a2bc2ec50000");

If you want to construct this data string based on a smart contract function call, an example can be found here:
https://github.com/michielpost/MetaMask.Blazor/blob/master/MetaMask.Blazor.SampleApp/Pages/Index.razor.cs#L202-L220

[racs]

Thank you.I'll test it

[racs]

Hello

any idea what is wrong on the last parameter of the function "functionCallEncoder.EncodeRequest" the new object[]... value? when i set it to null it works but not encoding the parameters value the way it is the program just stops and does not encode data

private string GetEncodedFunctionCallInteracao()
        {
            //This example uses Nethereum.ABI to create the ABI encoded string to call a smart contract function
                        
            FunctionABI function = new FunctionABI("safeTransferFrom", false);
                        
            var inputsParameters = new[] {
                    new Parameter("address", "from"),
                    new Parameter("address", "to"),
                    new Parameter("uint256", "id"),
                    new Parameter("uint256", "amount"),
                    new Parameter("bytes", "data")
                };
            function.InputParameters = inputsParameters;

            var functionCallEncoder = new FunctionCallEncoder();

            var data = functionCallEncoder.EncodeRequest(function.Sha3Signature, inputsParameters, new object[] { "0xe4Cc0b4dEa9463F8Fcad31548643bb90b06aF5FA",
                "0x473c4B76f170E650F2C203f09eFE8AD77aE57476",
                "1",
                "1",
                "0x" });

            dataencoded = data;
            
            return data;
        }```

[racs]

Solved

                "0xe4Cc0b4dEa9463F7Fcad31548643bb90b06aF5FA",
                "1",
                "1",
                "0x".HexToByteArray() });