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library GetCode { | |
function at(address _addr) public view returns (bytes memory o_code) { | |
assembly { | |
// retrieve the size of the code, this needs assembly | |
let size := extcodesize(_addr) | |
// allocate output byte array - this could also be done without assembly | |
// by using o_code = new bytes(size) | |
o_code := mload(0x40) | |
// new "memory end" including padding | |
mstore(0x40, add(o_code, and(add(add(size, 0x20), 0x1f), not(0x1f)))) |
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import { address as decodeAddress, concat, stringToBytes, verifySignature } from '@waves/ts-lib-crypto'; | |
import { verifyCustomData } from '@waves/waves-transactions'; | |
export function verifyAuthentication(signature: string, publicKey: string, address: string): string | null { | |
const signedByAddress = decodeAddress({ publicKey }); | |
const messageBytes = stringToBytes(address); | |
const authDataString = concat([255, 255, 255, 1], messageBytes); | |
if ( | |
verifyCustomData({ |
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let allTransactions: Array<any> = []; | |
let response: any; | |
let after: null | string = null; | |
do { | |
let url = `https://api.wavesplatform.com/v0/transactions/invoke-script?timeStart=2021-10-20T12%3A00%3A00.000Z&dapp=3PAETTtuW7aSiyKtn9GuML3RgtV1xdq1mQW&function=buyPerch&sort=desc&limit=100`; | |
if (after) { | |
url += `&after=${after}` | |
} | |
response = (await axios.get(url)).data; |
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func findString(a: Any) = { | |
match a { | |
case a: String => a | |
case a: List[Any] => | |
match a[0] { | |
case b: String => b | |
case _ => throw("Data is not a string") | |
} | |
case _ => throw("Data is not a string") | |
} |
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( | |
[ | |
ScriptTransfer(i.caller,100,unit) | |
], | |
42 | |
) |
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strict z = Invoke(dapp,func,args,[AttachedPayment(unit,100000000)]) | |
// Invoke(dApp: Address|Alias, function: String, arguments: List[Boolean|ByteVector|Int|String|List[Boolean|ByteVector|Int|String]], payments: List[AttachedPayments]): T|Unit |
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Language | Pros | Cons | |
---|---|---|---|
Solidity | Blockchain-specific | Many ways “to shoot himself in the leg” | |
Turing-complete (flexibility) | Difficult to write production-ready code | ||
Good developer tools and libraries |