private async Task ProcessMessageAsync(Erc20ContractCreatedMessage arg)
        {
            _log.Info($"Got Erc20ContractCreatedMessage: {arg.Address} ");

            var token = new Erc20Token
            {
                Address          = arg.Address,
                AssetId          = null,
                BlockHash        = arg.BlockHash,
                BlockTimestamp   = arg.BlockTimestamp,
                DeployerAddress  = arg.DeployerAddress,
                TokenDecimals    = (int?)arg.TokenDecimals,
                TokenName        = arg.TokenName,
                TokenSymbol      = arg.TokenSymbol,
                TokenTotalSupply = arg.TokenTotalSupply,
                TransactionHash  = arg.TransactionHash
            };

            // todo: refactor into event generation + projection logic
            var existingContract = await _erc20TokenService.GetByTokenAddressAsync(token.Address);

            if (existingContract == null)
            {
                await _erc20TokenService.AddAsync(token);
            }
        }
        public async Task <IActionResult> Add([FromBody] Erc20Token token)
        {
            await _erc20TokenService.AddAsync(token);

            return(Ok());
        }