Chris Hatch chatch
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| #!bin/sh | |
| for file in `ls readings/*Heat*.csv`; do python melt-monthly-csv.py $file readings-melted/`basename $file`; done | |
| for file in `ls readings/*Power*.csv`; do python melt-monthly-csv.py $file readings-melted/`basename $file`; done | |
| for file in `ls readings/*PV*.csv`; do python melt-monthly-csv.py $file readings-melted/`basename $file`; done |
chatch
/ EmitLargeEvent.sol
Created
November 4, 2020 04:24
Measure gas from emitting large or a lot of events
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| //SPDX-License-Identifier: Unlicense | |
| pragma solidity ^0.7.0; | |
| import "hardhat/console.sol"; | |
| contract EmitLargeEvent { | |
| event CustomHistorySimple ( | |
| bytes32 indexed id, |
chatch
/ mocha-nested-hooks.js
Created
October 26, 2020 12:19
Demonstrate the order of before/beforeEach with nested tests
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| describe("An afterEach hook", function () { | |
| afterEach(function () { | |
| console.log("afterEach run!"); | |
| }); | |
| before(function () { | |
| console.log("before TOP"); | |
| }); | |
| beforeEach(function () { |
chatch
/ evm-cost-store-string.js
Created
September 28, 2020 04:06
Calculate EVM gas cost of storing a given string
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| const STORE_WORD_COST = 20000 | |
| const WORD_BYTES = 32 | |
| const ONE_ETH = 1000000000000000000 | |
| const ONE_GWEI = 1000000000 | |
| // Calculate EVM gas cost for storing the given string | |
| const storeStringGasCost = str => Math.ceil(Buffer.from(str).length / WORD_BYTES) * STORE_WORD_COST | |
| // Calculate ETH cost for storing the given string at given GWEI gas price | |
| const storeStringEthCost = (str, gasPriceGwei) => storeStringGasCost(str) * gasPriceGwei * ONE_GWEI / ONE_ETH |
chatch
/ HatchNFT.sol
Created
September 14, 2020 09:19
Basic ERC721 (non enumerable - demonstrates ownership still shows on Etherscan, Metamask after custom token added)
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| pragma solidity 0.6.2; | |
| // import "https://github.com/0xcert/ethereum-erc721/src/contracts/tokens/nf-token-enumerable.sol"; | |
| import "https://github.com/0xcert/ethereum-erc721/src/contracts/tokens/nf-token-metadata.sol"; | |
| import "https://github.com/0xcert/ethereum-erc721/src/contracts/ownership/ownable.sol"; | |
| /** | |
| * @dev This is an example contract implementation of NFToken with metadata extension. | |
| */ | |
| contract HatchNFT is |
chatch
/ CreateSalted.sol
Created
September 4, 2020 03:58
From solidity readthedocs - example of Create2 and computing the predicted address
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| // SPDX-License-Identifier: GPL-3.0 | |
| pragma solidity >0.6.11 <0.8.0; | |
| contract D { | |
| uint public x; | |
| constructor(uint a) { | |
| x = a; | |
| } | |
| } |
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| // File: link_token/contracts/token/linkERC20Basic.sol | |
| pragma solidity >= 0.5.8; | |
| /** | |
| * @title ERC20Basic | |
| * @dev Simpler version of ERC20 interface | |
| * @dev see https://github.com/ethereum/EIPs/issues/179 | |
| */ |
chatch
/ USDCKovan.sol
Created
October 10, 2019 14:23
USDC token contract for testing on Kovan - paste it into remix
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| pragma solidity ^0.5.0; | |
| import "github.com/OpenZeppelin/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol"; | |
| import "github.com/OpenZeppelin/openzeppelin-contracts/contracts/token/ERC20/ERC20Detailed.sol"; | |
| import "github.com/OpenZeppelin/openzeppelin-contracts/contracts/token/ERC20/ERC20Mintable.sol"; | |
| contract USDCKovan is ERC20, ERC20Detailed, ERC20Mintable { | |
| string NAME = "USDCKovan"; |
chatch
/ stellar-xdr-object.txt
Last active
January 3, 2019 23:26
stellar-base xdr export - dump all the types
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| { | |
| "Value": { | |
| "_maxLength": 4294967295 | |
| }, | |
| "Uint32": { | |
| "MAX_VALUE": 4294967295, | |
| "MIN_VALUE": 0 | |
| }, | |
| "Hash": { | |
| "_length": 32, |
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| { | |
| "Hash": [ | |
| 67, | |
| 117, | |
| 103, | |
| 112, | |
| 93, | |
| 120, | |
| 39, | |
| 118, |
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