Smart Contract Note (1)

Development Notes

1. Development Server:

I started using Ganache as Ethereum local node, now I moved on using Go Ethereum

2. Run:


geth --http --http.corsdomain="*" --http.api web3,eth,debug,personal,net --vmdebug --datadir $HOME/persist-geth --dev console --allow-insecure-unlock

where persist-geth is the geth persistence folder

Spawns a local EVM node at 8545.

Connect with Metamask with chain ID 1337

Some notes on `-allow-insecure-lock`:

I was trying to making some transactions with some newly created accounts in geth node, the command to create new account:


geth account new --datadir $HOME/persist-geth

Error will happen when the account is not unlocked.


creation of xxxx errored: Returned error: authentication needed: password or unlock

👀 Reason:

Unlock Account is forbidden via when connecting to node via HTTP.

See PR: https://github.com/ethereum/go-ethereum/pull/17037

🏁 Solutions:

Run with web3 API to unlock the account.


web3.personal.accounts.unlockAccount("0x....", "SAFE-PASSWORD-BLAH-BLAH", null)

Duration time null is OK, for development I need the account to be unlocked indefinitely.

Some notes on -allow-insecure-lock:

Some notes on `-allow-insecure-lock`: