openethereum/js/packages/shared/redux/providers/tokensActions.js

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
import { uniq } from 'lodash';
import { IconCache } from '@parity/ui';
import { LOG_KEYS, getLogger } from '../../config';
import Contracts from '../../contracts';
import { fetchTokenIds, fetchTokenInfo } from '../../util/tokens';
import { updateTokensFilter } from './balancesActions';
const log = getLogger(LOG_KEYS.Balances);
export function setTokens (tokens) {
return {
type: 'setTokens',
tokens
};
}
export function loadTokens (options = {}) {
log.debug('loading tokens', Object.keys(options).length ? options : '');
return (dispatch, getState) => {
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const { api } = getState();
const { tokenReg } = Contracts.get(api);
tokenReg.getInstance()
.then((tokenRegInstance) => {
return fetchTokenIds(tokenRegInstance);
})
.then((tokenIndexes) => dispatch(fetchTokens(tokenIndexes, options)))
.catch((error) => {
console.warn('tokens::loadTokens', error);
});
};
}
export function fetchTokens (_tokenIndexes, options = {}) {
const tokenIndexes = uniq(_tokenIndexes || []);
return (dispatch, getState) => {
const { api } = getState();
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const { tokenReg } = Contracts.get(api);
const iconCache = IconCache.get();
return tokenReg.getInstance()
.then((tokenRegInstance) => {
const promises = tokenIndexes.map((id) => fetchTokenInfo(api, tokenRegInstance, id));
return Promise.all(promises);
})
.then((results) => {
const tokens = results
.reduce((tokens, token) => {
const { id, image, address } = token;
// dispatch only the changed images
if (iconCache.images[address] !== image) {
iconCache.add(address, image, true);
}
tokens[id] = token;
return tokens;
}, {});
log.debug('fetched token', tokens);
dispatch(setTokens(tokens));
dispatch(updateTokensFilter(null, null, options));
})
.catch((error) => {
console.warn('tokens::fetchTokens', error);
});
};
}