| 1 | const lodash = require('lodash');
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| 2 | const callable = require('../util/callable');
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| 3 |
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| 4 | class ContractEventOverride {
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| 5 | constructor(events, contract, conflux) {
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| 6 | this.signatureToEvent = lodash.keyBy(events, 'signature');
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| 7 | this.contract = contract;
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| 8 | this.conflux = conflux;
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| 9 |
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| 10 | return callable(this, this.call.bind(this));
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| 11 | }
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| 12 |
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| 13 | call(...args) {
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| 14 | const acceptArray = [];
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| 15 | const rejectArray = [];
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| 16 |
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| 17 | let filter;
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| 18 | for (const event of Object.values(this.signatureToEvent)) {
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| 19 | try {
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| 20 | filter = event(...args);
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| 21 | acceptArray.push(event.type);
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| 22 | } catch (e) {
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| 23 | rejectArray.push(event.type);
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| 24 | }
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| 25 | }
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| 26 |
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| 27 | if (!acceptArray.length) {
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| 28 | throw new Error(`can not match override "${rejectArray.join(',')}" with args (${args.join(',')})`);
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| 29 | }
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| 30 | if (acceptArray.length > 1) {
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| 31 | throw new Error(`can not determine override "${acceptArray.join('|')}" with args (${args.join(',')})`);
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| 32 | }
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| 33 |
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| 34 | return filter;
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| 35 | }
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| 36 |
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| 37 | decodeLog(log) {
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| 38 | const topic = log.topics[0];
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| 39 | const event = this.signatureToEvent[topic];
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| 40 | return event.decodeLog(log);
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| 41 | }
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| 42 | }
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| 43 |
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| 44 | module.exports = ContractEventOverride;
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