ethOnBlock
Name:
ethOnBlockethOnBlock is a stream of changes in the EVM state when a new block is mined. The stream includes the results of eth_call and other RPC requests provided by users and is restricted based on the number of calls.
This is a Gateway-API only stream.Options
Key
Description
Values
includeFields to include in the on block event stream
name, response, blockHeight, tag
[Default: all]call-paramsFields used to build an RPC call request
method- see chart below for available methods and additional fields required for each methodtag- latest, 0, or negative number. [Default: 0]name- unique string identifier for call. [Default: integer counter]Method
Call Documentation
Additional Fields
Examples
Gateway
Cloud-API
ethOnBlock Event
Subscribing to the
ethOnBlock stream via the Gateway-API in Python (Line 6 creates the subscription):1
import asyncio
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from bxcommon.rpc.provider.ws_provider import WsProvider
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ws_uri = "ws://127.0.0.1:28333"
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async def main():
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async with WsProvider(ws_uri) as ws:
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subscription_id = await ws.subscribe(
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"ethOnBlock",
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{"include": ["name", "response", "block_height", "tag"],
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"call-params": [{"name": "my_call_name",
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"to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
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"gas": "0x76c0",
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"value": "0x9184e72a",
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"data": "0x00"},
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{"name": "number",
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"method": "eth_blockNumber"}]})
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while True:
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next_notification = await ws.get_next_subscription_notification_by_id(subscription_id)
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print(next_notification) # or process it generally
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await ws.unsubscribe(subscription_id)
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if __name__ == '__main__':
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asyncio.get_event_loop().run_until_complete(main())
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The
ethOnBlock stream is not available via Cloud-API.TaskCompletedEventis received after all calls have been executed upon receipt of a block.TaskDisabledEvent is received if there is an error response to a call, indicating that the call has been disabled.Python Gateway:
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<<< {'name': 'balance', 'response': {'result': '0x1'}, 'blockHeight': 11654331, 'tag': 11654331}
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{'name': 'height', 'response': {'result': '0xb1d4bb'}, 'blockHeight': 11654331, 'tag': 11654331}
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{'name': 'TaskDisabledEvent', 'response': {'commandMethod': 'eth_getBalance', 'blockOffset': 0, 'callName': 'balance', 'callPayload': {'address': '0x0000000000000000000000000000000000000000'}, 'active': False}, 'blockHeight': 11654331, 'tag': 11654331}
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{'name': 'number', 'response': {'result': '0x0'}, 'blockHeight': 11654331, 'tag': 11654331}
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{'name': 'TaskCompletedEvent', 'response': {}, 'blockHeight': 11654331, 'tag': 11654331}}
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Go Gateway:
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<<< {'name': 'balance', 'response': '0x1', 'block_height': 11654331, 'tag': 11654331}
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{'name': 'height', 'response': '0xb1d4bb', 'block_height': 11654331, 'tag': 11654331}
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{'name': 'TaskDisabledEvent', 'response': '{commandMethod:eth_call blockOffset:0 callName:my_call callPayload:{"data":"0x00","to":"0x0000000000000000000000000000000000000000"} active:false}', 'block_height': '13462626', 'tag': '0xcd6c62'}
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{'name': 'number', 'response': '0x0', 'block_height': 11654331, 'tag': 11654331}
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{'name': 'TaskCompletedEvent', 'response': '', 'block_height': 11654331, 'tag': 11654331}}
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Last modified 1mo ago
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