private async Task InitContract() { var contract = await _blockchainRepository.GetStoredContract(ContractHelpers.ContractName); if (contract == null) { var unlockResult = await _web3.Personal.UnlockAccount.SendRequestAsync(_senderAddress, _password, 120); var transactionHash = await _web3.Eth.DeployContract.SendRequestAsync(_abi, _contractByteCode, _senderAddress, new HexBigInteger(900000)); var receipt = await MineAndGetReceiptAsync(transactionHash); var contractAddress = receipt.ContractAddress; var contractToSave = new StoredContract { Name = ContractHelpers.ContractName, Address = contractAddress }; await _blockchainRepository.SaveStoredContract(contractToSave); _contract = _web3.Eth.GetContract(_abi, contractAddress); } else { var contractAddress = contract.Address; _contract = _web3.Eth.GetContract(_abi, contractAddress); } }