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Try setting

web3.eth.defaultAccount = accounts[0]

It sounds like your transaction doesn't know what account to use to sign the call. Any call that changes the state of the contract (write operation) requires a signed transaction.

An alternative approach would be to pass a 'transaction object' as the last argument to contract method:

storage.set(10,{from: accounts[0]});

Try setting

web3.eth.defaultAccount = eth.accounts[0]

It sounds like your transaction doesn't know what account to use to sign the call. Any call that changes the state of the contract (write operation) requires a signed transaction.

An alternative approach would be to pass a 'transaction object' as the last argument to contract method:

storage.set(10,{from: accounts[0]});

Edit 1:

When I chose the 'from' account, I got the following error: 'authentication needed: password or unlock'. So I needed to run personal.unlockAccount(eth.accounts[0],"password",15000). You can read about it at 'authentication needed: password or unlock' Error when trying to call smart contract method via web3 .

Try setting

web3.eth.defaultAccount = accounts[0]

It sounds like your transaction doesn't know what account to use to sign the call. Any calls that change the state of the contract (write calls) require a signed transaction.

An alternative approach would be to pass a 'transaction object' as the last argument to contract method:

storage.set(10,{from: accounts[0]});

Try setting

web3.eth.defaultAccount = accounts[0]

It sounds like your transaction doesn't know what account to use to sign the call. Any call that changes the state of the contract (write operation) requires a signed transaction.

An alternative approach would be to pass a 'transaction object' as the last argument to contract method:

storage.set(10,{from: accounts[0]});

Try setting

web3.eth.defaultAccount = accounts[0]

It sounds like your transaction doesn't know what account to use to sign the call.

Try setting

web3.eth.defaultAccount = accounts[0]

It sounds like your transaction doesn't know what account to use to sign the call. Any calls that change the state of the contract (write calls) require a signed transaction.

An alternative approach would be to pass a 'transaction object' as the last argument to contract method:

storage.set(10,{from: accounts[0]});