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SyntaxError: Unexpected token '?' in upgrading smart contract using @openzeppelin/hardhat-upgrades
user_127979600
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1
1
192
openzeppelin hardhat blockchain smartcontracts ethereum
How to compare an ascii string with a uint8 array in Solidity?
user_113348720
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3
1
70
solidity ethereum
Intermittent Error on truffle test - Error: PollingBlockTracker - encountered an error while attempting to update latest block:
user_96237890
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1
0
59
consensys-truffle ganache drone.io truffle ethereum
Is there a way for a contract to sign a transaction on the behalf of a user?
user_174930550
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1
0
45
blockchain solidity ethereum
How do I attach my website icon to metamask signature?
user_192270470
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1
0
48
metamask ethereum reactjs signature
If ten people call a function that counts up by 1 every time it is called, how are these requests handled if they're submitted to the same block?
user_191519530
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1
1
32
kadena blockchain ethereum
MATIC + Web3 : Unable to interact with a deployed smart contract
user_54375200
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1
0
82
matic web3py ethereum polygon python
enable 2 users to use my contract at the same time with different states in Solidity
user_129745380
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2
0
40
smartcontracts solidity ethereum
How to block bot from stealing deposited eth in smart contract
user_36869320
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2
1
78
web3js smartcontracts solidity ethereum bots
Error encountered during Ethereum solidity NFT contract execution [Out of gas]?
user_88219940
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1
1
103
nft smartcontracts solidity ethereum
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