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When compiling the FundMe I am getting this "file not found error". I have checked the files in github manually and they are there ! This is my code ... FundMe.sol // SPDX-License-Identifier: MIT
// Smart contract that lets anyone deposit ETH into the contract
// Only the owner of the contract can withdraw the ETH
pragma solidity >=0.6.0 <0.9.0;
// Get the latest ETH/USD price from chainlink price feed
import "@chainlink/contracts/src/v0.6/interfaces/AggregatorV3Interface.sol";
import "@chainlink/contracts/src/v0.6/vendor/SafeMathChainlink.sol";
contract FundMe {
// safe math library check uint256 for integer overflows
using SafeMathChainlink for uint256;
//mapping to store which address depositeded how much ETH
mapping(address => uint256) public addressToAmountFunded;
// array of addresses who deposited
address[] public funders;
//address of the owner (who deployed the contract)
address public owner;
// the first person to deploy the contract is
// the owner
constructor() public {
owner = msg.sender;
}
function fund() public payable {
// 18 digit number to be compared with donated amount
uint256 minimumUSD = 50 * 10**18;
//is the donated amount less than 50USD?
require(
getConversionRate(msg.value) >= minimumUSD,
"You need to spend more ETH!"
);
//if not, add to mapping and funders array
addressToAmountFunded[msg.sender] += msg.value;
funders.push(msg.sender);
}
//function to get the version of the chainlink pricefeed
function getVersion() public view returns (uint256) {
AggregatorV3Interface priceFeed = AggregatorV3Interface(
0x8A753747A1Fa494EC906cE90E9f37563A8AF630e
);
return priceFeed.version();
}
function getPrice() public view returns (uint256) {
AggregatorV3Interface priceFeed = AggregatorV3Interface(
0x8A753747A1Fa494EC906cE90E9f37563A8AF630e
);
(, int256 answer, , , ) = priceFeed.latestRoundData();
// ETH/USD rate in 18 digit
return uint256(answer * 10000000000);
}
// 1000000000
function getConversionRate(uint256 ethAmount)
public
view
returns (uint256)
{
uint256 ethPrice = getPrice();
uint256 ethAmountInUsd = (ethPrice * ethAmount) / 1000000000000000000;
// the actual ETH/USD conversation rate, after adjusting the extra 0s.
return ethAmountInUsd;
}
//modifier: https://medium.com/coinmonks/solidity-tutorial-all-about-modifiers-a86cf81c14cb
modifier onlyOwner() {
//is the message sender owner of the contract?
require(msg.sender == owner);
_;
}
// onlyOwner modifer will first check the condition inside it
// and
// if true, withdraw function will be executed
function withdraw() public payable onlyOwner {
// If you are using version eight (v0.8) of chainlink aggregator interface,
// you will need to change the code below to
// payable(msg.sender).transfer(address(this).balance);
msg.sender.transfer(address(this).balance);
//iterate through all the mappings and make them 0
//since all the deposited amount has been withdrawn
for (
uint256 funderIndex = 0;
funderIndex < funders.length;
funderIndex++
) {
address funder = funders[funderIndex];
addressToAmountFunded[funder] = 0;
}
//funders array will be initialized to 0
funders = new address[](0);
}
}And brownie-config.yaml depenencies:
# - <organisation/repo>@<version>
- smartcontractkit/[email protected]
compiler:
solc:
version: 0.6.6
remappings:
- "@chainlink=smartcontractkit/[email protected]"
Thanks for any help. |
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Replies: 3 comments 2 replies
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In order to overcome this error I have tried to "flatten" the code Here is the full code // SPDX-License-Identifier: MIT
// Smart contract that lets anyone deposit ETH into the contract
// Only the owner of the contract can withdraw the ETH
pragma solidity >=0.6.0 <0.9.0;
// This is from AggregatorV3Interface.sol
interface AggregatorV3Interface {
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
// getRoundData and latestRoundData should both raise "No data present"
// if they do not have data to report, instead of returning unset values
// which could be misinterpreted as actual reported values.
function getRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
// This is from SafeMathChainlink.sol
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMathChainlink {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
contract FundMe {
// safe math library check uint256 for integer overflows
using SafeMathChainlink for uint256;
//mapping to store which address depositeded how much ETH
mapping(address => uint256) public addressToAmountFunded;
// array of addresses who deposited
address[] public funders;
//address of the owner (who deployed the contract)
address public owner;
// the first person to deploy the contract is
// the owner
constructor() public {
owner = msg.sender;
}
function fund() public payable {
// 18 digit number to be compared with donated amount
uint256 minimumUSD = 50 * 10**18;
//is the donated amount less than 50USD?
require(
getConversionRate(msg.value) >= minimumUSD,
"You need to spend more ETH!"
);
//if not, add to mapping and funders array
addressToAmountFunded[msg.sender] += msg.value;
funders.push(msg.sender);
}
//function to get the version of the chainlink pricefeed
function getVersion() public view returns (uint256) {
AggregatorV3Interface priceFeed = AggregatorV3Interface(
0x8A753747A1Fa494EC906cE90E9f37563A8AF630e
);
return priceFeed.version();
}
function getPrice() public view returns (uint256) {
AggregatorV3Interface priceFeed = AggregatorV3Interface(
0x8A753747A1Fa494EC906cE90E9f37563A8AF630e
);
(, int256 answer, , , ) = priceFeed.latestRoundData();
// ETH/USD rate in 18 digit
return uint256(answer * 10000000000);
}
// 1000000000
function getConversionRate(uint256 ethAmount)
public
view
returns (uint256)
{
uint256 ethPrice = getPrice();
uint256 ethAmountInUsd = (ethPrice * ethAmount) / 1000000000000000000;
// the actual ETH/USD conversation rate, after adjusting the extra 0s.
return ethAmountInUsd;
}
//modifier: https://medium.com/coinmonks/solidity-tutorial-all-about-modifiers-a86cf81c14cb
modifier onlyOwner() {
//is the message sender owner of the contract?
require(msg.sender == owner);
_;
}
// onlyOwner modifer will first check the condition inside it
// and
// if true, withdraw function will be executed
function withdraw() public payable onlyOwner {
// If you are using version eight (v0.8) of chainlink aggregator interface,
// you will need to change the code below to
// payable(msg.sender).transfer(address(this).balance);
msg.sender.transfer(address(this).balance);
//iterate through all the mappings and make them 0
//since all the deposited amount has been withdrawn
for (
uint256 funderIndex = 0;
funderIndex < funders.length;
funderIndex++
) {
address funder = funders[funderIndex];
addressToAmountFunded[funder] = 0;
}
//funders array will be initialized to 0
funders = new address[](0);
}
}
This appears to have worked ! Compiling contracts...
Project has been compiled. Build artifacts saved at D:\aa_python3\BLOCK\brownie_fund_me\build\contracts However I'd still like to get that import working ! |
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Hello @Dave777 Could you please share your brownie-config.yaml? |
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Hi @cromewar I re-compiled, I now get a WARNING: WARNING: Unable to compile smartcontractkit/[email protected] due to a UnicodeDecodeError - you may still be able to import sources from the package, but will be unable to load the package directly. Is this normal ? Full response is: WARNING: Unable to compile smartcontractkit/[email protected] due to a UnicodeDecodeError - you may still be able to import sources from the package, but will be unable to load the package directly. Compiling contracts...
Project has been compiled. Build artifacts saved at D:\aa_python3\BLOCK\brownie_fund_me\build\contracts Thanks |
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@cromewar It worked without the warning. All good ... thanks for your help |
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I'm sorry for the delay, I'm glad you solved the problem I was almost sure the problem was on |
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Hi @cromewar
Thanks for asking me about that.
I just realised that I mis-spelt "dependencies"
I corrected it and took out the interface scripts and replaced with the @chainlink's
I re-compiled, I now get a WARNING:
WARNING: Unable to compile smartcontractkit/[email protected] due to a UnicodeDecodeError - you may still be able to import sources from the package, but will be unable to load the package directly.
Is this normal ?
Full response is:
WARNING: Unable to compile smartcontractkit/[email protected] due to a UnicodeDecodeError - you may still be able to import sources from the package, but will be unable to load the package directly.
Compiling contrac…