[@nevermined-io/nevermined-sdk-js](../code-reference.md) / [events](../modules/events.md) / ContractEvent # Class: ContractEvent [events](../modules/events.md).ContractEvent ## Hierarchy - [`NeverminedEvent`](events.NeverminedEvent.md) ↳ **`ContractEvent`** ## Table of contents ### Constructors - [constructor](events.ContractEvent.md#constructor) ### Properties - [contract](events.ContractEvent.md#contract) - [eventEmitter](events.ContractEvent.md#eventemitter) ### Accessors - [artifactsFolder](events.ContractEvent.md#artifactsfolder) - [config](events.ContractEvent.md#config) - [instanceConfig](events.ContractEvent.md#instanceconfig) - [instantiableConfig](events.ContractEvent.md#instantiableconfig) - [logger](events.ContractEvent.md#logger) - [nevermined](events.ContractEvent.md#nevermined) - [web3](events.ContractEvent.md#web3) ### Methods - [addresses](events.ContractEvent.md#addresses) - [checkExists](events.ContractEvent.md#checkexists) - [eventExists](events.ContractEvent.md#eventexists) - [filterToArgs](events.ContractEvent.md#filtertoargs) - [findSigner](events.ContractEvent.md#findsigner) - [getBlockNumber](events.ContractEvent.md#getblocknumber) - [getEventData](events.ContractEvent.md#geteventdata) - [getPastEvents](events.ContractEvent.md#getpastevents) - [once](events.ContractEvent.md#once) - [setInstanceConfig](events.ContractEvent.md#setinstanceconfig) - [subscribe](events.ContractEvent.md#subscribe) - [addressesStatic](events.ContractEvent.md#addressesstatic) - [findSignerStatic](events.ContractEvent.md#findsignerstatic) - [getInstance](events.ContractEvent.md#getinstance) - [setInstanceConfig](events.ContractEvent.md#setinstanceconfig-1) ## Constructors ### constructor • `Protected` **new ContractEvent**(`contract`, `eventEmitter`) #### Parameters | Name | Type | | :------ | :------ | | `contract` | `ContractBase` | | `eventEmitter` | [`EventEmitter`](../interfaces/events.EventEmitter.md) | #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[constructor](events.NeverminedEvent.md#constructor) #### Defined in [src/events/NeverminedEvent.ts:35](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/NeverminedEvent.ts#L35) ## Properties ### contract • `Protected` **contract**: `ContractBase` = `null` #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[contract](events.NeverminedEvent.md#contract) #### Defined in [src/events/NeverminedEvent.ts:30](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/NeverminedEvent.ts#L30) ___ ### eventEmitter • `Protected` **eventEmitter**: [`EventEmitter`](../interfaces/events.EventEmitter.md) #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[eventEmitter](events.NeverminedEvent.md#eventemitter) #### Defined in [src/events/NeverminedEvent.ts:29](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/NeverminedEvent.ts#L29) ## Accessors ### artifactsFolder • `Protected` `get` **artifactsFolder**(): `string` #### Returns `string` #### Inherited from NeverminedEvent.artifactsFolder #### Defined in [src/Instantiable.abstract.ts:96](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L96) ___ ### config • `Protected` `get` **config**(): [`Config`](Config.md) #### Returns [`Config`](Config.md) #### Inherited from NeverminedEvent.config #### Defined in [src/Instantiable.abstract.ts:80](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L80) ___ ### instanceConfig • `Protected` `get` **instanceConfig**(): `InstantiableConfig` #### Returns `InstantiableConfig` #### Inherited from NeverminedEvent.instanceConfig #### Defined in [src/Instantiable.abstract.ts:100](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L100) ___ ### instantiableConfig • `Protected` `get` **instantiableConfig**(): `InstantiableConfig` #### Returns `InstantiableConfig` #### Inherited from NeverminedEvent.instantiableConfig #### Defined in [src/Instantiable.abstract.ts:73](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L73) ___ ### logger • `Protected` `get` **logger**(): [`Logger`](utils.Logger.md) #### Returns [`Logger`](utils.Logger.md) #### Inherited from NeverminedEvent.logger #### Defined in [src/Instantiable.abstract.ts:87](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L87) ___ ### nevermined • `Protected` `get` **nevermined**(): [`Nevermined`](Nevermined.md) #### Returns [`Nevermined`](Nevermined.md) #### Inherited from NeverminedEvent.nevermined #### Defined in [src/Instantiable.abstract.ts:33](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L33) ___ ### web3 • `Protected` `get` **web3**(): `JsonRpcProvider` #### Returns `JsonRpcProvider` #### Inherited from NeverminedEvent.web3 #### Defined in [src/Instantiable.abstract.ts:63](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L63) ## Methods ### addresses ▸ **addresses**(): `Promise`<`string`[]\> #### Returns `Promise`<`string`[]\> #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[addresses](events.NeverminedEvent.md#addresses) #### Defined in [src/Instantiable.abstract.ts:129](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L129) ___ ### checkExists ▸ `Protected` **checkExists**(`address`): `Promise`<`boolean`\> Returns true of contract exists else it throws. #### Parameters | Name | Type | | :------ | :------ | | `address` | `string` | #### Returns `Promise`<`boolean`\> true if the contract exists. #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[checkExists](events.NeverminedEvent.md#checkexists) #### Defined in [src/Instantiable.abstract.ts:44](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L44) ___ ### eventExists ▸ `Private` **eventExists**(`eventName`): `boolean` #### Parameters | Name | Type | | :------ | :------ | | `eventName` | `string` | #### Returns `boolean` #### Defined in [src/events/ContractEvent.ts:69](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/ContractEvent.ts#L69) ___ ### filterToArgs ▸ `Private` **filterToArgs**(`eventName`, `filter`): `any`[] #### Parameters | Name | Type | | :------ | :------ | | `eventName` | `string` | | `filter` | [`Filter`](../interfaces/events.Filter.md) | #### Returns `any`[] #### Defined in [src/events/ContractEvent.ts:73](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/ContractEvent.ts#L73) ___ ### findSigner ▸ **findSigner**(`from`): `Promise`<`Signer`\> #### Parameters | Name | Type | | :------ | :------ | | `from` | `string` | #### Returns `Promise`<`Signer`\> #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[findSigner](events.NeverminedEvent.md#findsigner) #### Defined in [src/Instantiable.abstract.ts:105](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L105) ___ ### getBlockNumber ▸ **getBlockNumber**(): `Promise`<`number`\> #### Returns `Promise`<`number`\> #### Overrides [NeverminedEvent](events.NeverminedEvent.md).[getBlockNumber](events.NeverminedEvent.md#getblocknumber) #### Defined in [src/events/ContractEvent.ts:65](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/ContractEvent.ts#L65) ___ ### getEventData ▸ **getEventData**(`options`): [`EventResult`](../modules/events.md#eventresult) #### Parameters | Name | Type | | :------ | :------ | | `options` | [`EventOptions`](../interfaces/events.EventOptions.md) | #### Returns [`EventResult`](../modules/events.md#eventresult) #### Overrides [NeverminedEvent](events.NeverminedEvent.md).[getEventData](events.NeverminedEvent.md#geteventdata) #### Defined in [src/events/ContractEvent.ts:29](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/ContractEvent.ts#L29) ___ ### getPastEvents ▸ **getPastEvents**(`options`): [`EventResult`](../modules/events.md#eventresult) #### Parameters | Name | Type | | :------ | :------ | | `options` | [`EventOptions`](../interfaces/events.EventOptions.md) | #### Returns [`EventResult`](../modules/events.md#eventresult) #### Overrides [NeverminedEvent](events.NeverminedEvent.md).[getPastEvents](events.NeverminedEvent.md#getpastevents) #### Defined in [src/events/ContractEvent.ts:47](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/ContractEvent.ts#L47) ___ ### once ▸ **once**(`callback?`, `options?`): `Promise`<[`EventResult`](../modules/events.md#eventresult)\> #### Parameters | Name | Type | | :------ | :------ | | `callback?` | (`events`: [`EventResult`](../modules/events.md#eventresult)[]) => `void` | | `options?` | [`EventOptions`](../interfaces/events.EventOptions.md) | #### Returns `Promise`<[`EventResult`](../modules/events.md#eventresult)\> #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[once](events.NeverminedEvent.md#once) #### Defined in [src/events/NeverminedEvent.ts:55](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/NeverminedEvent.ts#L55) ___ ### setInstanceConfig ▸ `Protected` **setInstanceConfig**(`config`): `void` #### Parameters | Name | Type | | :------ | :------ | | `config` | `InstantiableConfig` | #### Returns `void` #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[setInstanceConfig](events.NeverminedEvent.md#setinstanceconfig) #### Defined in [src/Instantiable.abstract.ts:171](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L171) ___ ### subscribe ▸ **subscribe**(`callback`, `options`): [`ContractEventSubscription`](../interfaces/events.ContractEventSubscription.md) #### Parameters | Name | Type | | :------ | :------ | | `callback` | (`events`: [`EventResult`](../modules/events.md#eventresult)[]) => `void` | | `options` | [`EventOptions`](../interfaces/events.EventOptions.md) | #### Returns [`ContractEventSubscription`](../interfaces/events.ContractEventSubscription.md) #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[subscribe](events.NeverminedEvent.md#subscribe) #### Defined in [src/events/NeverminedEvent.ts:41](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/NeverminedEvent.ts#L41) ___ ### addressesStatic ▸ `Static` **addressesStatic**(`config`, `web3`): `Promise`<`string`[]\> #### Parameters | Name | Type | | :------ | :------ | | `config` | [`Config`](Config.md) | | `web3` | `JsonRpcProvider` | #### Returns `Promise`<`string`[]\> #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[addressesStatic](events.NeverminedEvent.md#addressesstatic) #### Defined in [src/Instantiable.abstract.ts:142](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L142) ___ ### findSignerStatic ▸ `Static` **findSignerStatic**(`config`, `web3`, `from`): `Promise`<`Signer`\> #### Parameters | Name | Type | | :------ | :------ | | `config` | [`Config`](Config.md) | | `web3` | `JsonRpcProvider` | | `from` | `string` | #### Returns `Promise`<`Signer`\> #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[findSignerStatic](events.NeverminedEvent.md#findsignerstatic) #### Defined in [src/Instantiable.abstract.ts:115](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L115) ___ ### getInstance ▸ `Static` **getInstance**(`contract`, `eventEmitter`, `nevermined`, `web3`): [`ContractEvent`](events.ContractEvent.md) #### Parameters | Name | Type | | :------ | :------ | | `contract` | `ContractBase` | | `eventEmitter` | [`EventEmitter`](../interfaces/events.EventEmitter.md) | | `nevermined` | [`Nevermined`](Nevermined.md) | | `web3` | `JsonRpcProvider` | #### Returns [`ContractEvent`](events.ContractEvent.md) #### Overrides [NeverminedEvent](events.NeverminedEvent.md).[getInstance](events.NeverminedEvent.md#getinstance) #### Defined in [src/events/ContractEvent.ts:14](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/events/ContractEvent.ts#L14) ___ ### setInstanceConfig ▸ `Static` `Protected` **setInstanceConfig**<`T`\>(`instance`, `instantiableConfig`): `void` #### Type parameters | Name | Type | | :------ | :------ | | `T` | extends `Instantiable`<`T`\> | #### Parameters | Name | Type | | :------ | :------ | | `instance` | `T` | | `instantiableConfig` | `InstantiableConfig` | #### Returns `void` #### Inherited from [NeverminedEvent](events.NeverminedEvent.md).[setInstanceConfig](events.NeverminedEvent.md#setinstanceconfig-1) #### Defined in [src/Instantiable.abstract.ts:162](https://github.com/nevermined-io/sdk-js/blob/55f88d2/src/Instantiable.abstract.ts#L162)