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Add session persistence

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Signed-off-by: Sebastian Martinez <sebastinez@me.com>
This commit is contained in:
Sebastian Martinez
2021-06-08 21:34:31 -03:00
parent 01585eaa39
commit d7b109d24f
1 changed files with 17 additions and 6 deletions
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src/session.ts
+17 -6
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@@ -25,13 +25,16 @@ export type State =
export interface Session {
address: string
tokenBalance: any
tokenBalance: BigNumber
tx: TxState
}
export const createState = (initial: State) => {
export const loadState = (initial: State) => {
const store = writable<State>(initial)
const session = window.localStorage.getItem("session");
if (session) store.set({ connection: Connection.Connected, session: JSON.parse(session) })
return {
subscribe: store.subscribe,
connect: async (config: Config) => {
@@ -52,11 +55,12 @@ export const createState = (initial: State) => {
const address = await signer.getAddress();
try {
const tokenBalance = await token.balanceOf(address);
const tokenBalance: BigNumber = await token.balanceOf(address);
store.set({
connection: Connection.Connected,
session: { address, tokenBalance, tx: null }
});
window.localStorage.setItem("session", JSON.stringify({ address, tokenBalance, tx: null }));
} catch (e) {
console.error(e);
}
@@ -77,7 +81,7 @@ export const createState = (initial: State) => {
try {
const token = new ethers.Contract(config.radToken.address, config.abi.token, config.provider);
const tokenBalance = await token.balanceOf(addr);
const tokenBalance: BigNumber = await token.balanceOf(addr);
state.session.tokenBalance = tokenBalance;
store.set(state);
@@ -146,7 +150,13 @@ export const createState = (initial: State) => {
store.update(s => {
switch (s.connection) {
case Connection.Connected:
s.session.address = address;
// In case of locking Metamask the accountsChanged event returns undefined.
// To prevent out of sync state, the wallet gets disconnected.
if (address === undefined) disconnectWallet();
else {
s.session.address = address;
window.localStorage.setItem("session", JSON.stringify({ address, tokenBalance: s.session.tokenBalance, tx: s.session.tx }))
}
return s;
default:
return s;
@@ -156,7 +166,7 @@ export const createState = (initial: State) => {
};
};
export const state = createState({ connection: Connection.Disconnected });
export const state = loadState({ connection: Connection.Disconnected });
export const session = derived(state, s => {
if (s.connection === Connection.Connected) {
return s.session;
@@ -189,5 +199,6 @@ export function token(config: Config): ethers.Contract {
}
export function disconnectWallet() {
window.localStorage.removeItem("session");
location.reload();
}