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EIP-1193: Add chainChanged event #2057

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Jun 27, 2019
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EIP-1193: Add chainChanged event #2057

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9639f1e
change networkChanged to chainChanged on EIP-1193
pedrouid May 21, 2019
4a4ac66
Update eip-1193.md
pedrouid May 21, 2019
914d9f9
fix build
pedrouid May 21, 2019
24ddf4c
Update eip-1193.md
pedrouid May 24, 2019
1806b29
Put networkChanged event back on EIP-1193
pedrouid Jun 12, 2019
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15 changes: 15 additions & 0 deletions EIPS/eip-1193.md
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ status: Draft
type: Standards Track
category: Interface
created: 2018-06-30
requires: 155, 695, 1102, 1474
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@danfinlay even if not changing the chainid, adding 1102 and 1474 as a requirement here may make sense.

---

## Summary
Expand Down Expand Up @@ -85,6 +86,16 @@ ethereum.on('close', listener: (code: Number, reason: String) => void): this;

The event emits with `code` and `reason`. The code follows the table of [`CloseEvent` status codes](https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent#Status_codes).

#### chainChanged

The provider emits `chainChanged` on connect to a new chain.

```js
ethereum.on('chainChanged', listener: (chainId: String) => void): this;
```

The event emits with `chainId`, the new chain returned from `eth_chainId`.

#### networkChanged

The provider emits `networkChanged` on connect to a new network.
Expand Down Expand Up @@ -255,6 +266,10 @@ If the network connects, the Ethereum Provider **MUST** emit an event named `con

If the network connection closes, the Ethereum Provider **MUST** emit an event named `close` with args `code: Number, reason: String` following the [status codes for `CloseEvent`](https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent#Status_codes).

#### chainChanged

If the chain the provider is connected to changes, the provider **MUST** emit an event named `chainChanged` with args `chainId: String` containing the ID of the new chain (using the Ethereum JSON-RPC call `eth_chainId`).

#### networkChanged

If the network the provider is connected to changes, the provider **MUST** emit an event named `networkChanged` with args `networkId: String` containing the ID of the new network (using the Ethereum JSON-RPC call `net_version`).
Expand Down