public async Task <IEnumerable <MarketEntryDisplayModel> > Get(string systemId = DEFAULT_SYS_ID)
{
Web3 web3 = new Web3(ETHEREUM_URL);
var marketService = new RawMaterialMarketService(web3, MARKET_CONTRACT_ADDRESS);
uint count = (uint)await marketService.MarketEntriesArrayIndexQueryAsync();
// get individual market entries
List <MarketEntryDisplayModel> allMarketEntries = new List <MarketEntryDisplayModel>();
for (int i = 0; i < count; i++)
{
var me = await marketService.MarketEntriesQueryAsync(i);
if (systemId == DEFAULT_SYS_ID || systemId == me.SystemId)
{
allMarketEntries.Add(new MarketEntryDisplayModel()
{
SystemId = me.SystemId,
RawMaterial = me.RawMaterial,
Kilos = FormatBigInt(me.Kilos),
UsdPerKilo = FormatBigInt(me.UsdPerKilo),
Status = me.Status,
SellerContactEmail = me.SellerContactEmail
});
}
}
return(allMarketEntries.ToArray());
}
public async Task <ActionResult <MarketEntryDisplayModel> > Post([FromBody] MarketEntryCreateModel marketEntryCreateModel)
{
// Could add data validation here, check for empty strings etc, but smart contract does it anyway
// Prepare transaction
Account account = new Account("YOU NEED TO ENTER ACCOUNT PRIVATE KEY HERE");
Web3 web3 = new Web3(account, ETHEREUM_URL);
var marketService = new RawMaterialMarketService(web3, MARKET_CONTRACT_ADDRESS);
byte[] systemIdBytes = marketEntryCreateModel.SystemId.ConvertToBytes();
byte[] rawMaterialBytes = marketEntryCreateModel.RawMaterial.ConvertToBytes();
// Send the transaction
TransactionReceipt receipt = null;
try
{
receipt = await marketService.CreateBuyOfferRequestAndWaitForReceiptAsync(
systemIdBytes,
rawMaterialBytes,
marketEntryCreateModel.Kilos,
marketEntryCreateModel.UsdPerKilo
);
}
catch (Exception ex)
{
return(this.StatusCode(StatusCodes.Status500InternalServerError, $"Internal error transaction sending failed with message: {ex.Message}"));
}
// Get results
var txStatus = receipt.Status.Value;
if (txStatus == 1)
{
// get the most recently created record
uint mostRecentEntryIndex = ((uint)await marketService.MarketEntriesArrayIndexQueryAsync()) - 1;
var me = await marketService.MarketEntriesQueryAsync(mostRecentEntryIndex);
return(this.StatusCode(StatusCodes.Status201Created, new MarketEntryDisplayModel()
{
SystemId = me.SystemId,
RawMaterial = me.RawMaterial,
Kilos = FormatBigInt(me.Kilos),
UsdPerKilo = FormatBigInt(me.UsdPerKilo),
Status = me.Status,
SellerContactEmail = me.SellerContactEmail
}));
}
else
{
return(this.StatusCode(StatusCodes.Status500InternalServerError, $"Internal error transaction sent but failed to process"));
}
}