Save and load string-based states in EVM blockchains
- Fantom: 0x91AFCCEd2446B635E4988ce4E664234E0Ed9C7b0
- Other EVM chains soon...
- Also: add information on size limits
- Also: add complete example saving localStorage then loading from it
The contract ABI can be found here.
To interact with the contract you need to call the following functions (examples for Fantom):
This function saves a state for a user.
import { use
7A18
Account, useContractWrite, usePrepareContractWrite } from 'wagmi'
const { config } = usePrepareContractWrite({
address: '0x91afcced2446b635e4988ce4e664234e0ed9c7b0',
abi: contractABI,
functionName: 'saveState',
})
const { write } = useContractWrite(config)
const state = {
counter: 123456
}
write(JSON.stringify(state))This function loads a state for a user.
Example:
import { useAccount, useContractRead, usePrepareContractRead } from 'wagmi'
const { config } = usePrepareContractRead({
address: '0x91AFCCEd2446B635E4988ce4E664234E0Ed9C7b0',
abi: contractABI,
functionName: 'loadState',
})
const { read } = useContractRead(config)
const state = JSON.parse(read()) //{ counter: 123456 }This function saves a state with a provided key. Default key is "default" (used when function is called without a key).
Example:
import { useAccount, useContractWrite, usePrepareContractWrite } from 'wagmi'
const { config } = usePrepareContractWrite({
address: '0x91AFCCEd2446B635E4988ce4E664234E0Ed9C7b0',
abi: contractABI,
functionName: 'saveState',
})
const { write } = useContractWrite(config)
const state = {
counter: 123456
}
write('key', JSON.stringify(state))This function loads a state with a provided key. Default key is "default" (used when function is called without a key).
Example:
import { useAccount, useContractRead, usePrepareContractRead } from 'wagmi'
const { config } = usePrepareContractRead({
address: '0x91AFCCEd2446B635E4988ce4E664234E0Ed9C7b0',
abi: contractABI,
functionName: 'loadState',
})
const { read } = useContractRead(config)
const state = JSON.parse(read('key')) //{ counter: 123456 }