/eth/v3/validator/blocks/{slot}
/eth/v3/validator/blocks/:slot:
Produce a new block, without signature
Asks a beacon node to generate a legitimate block so that a validator can sign it. The execution and beacon nodes determine the current state of the network, which determines whether the returned block is blindfolded or unblinded.
If the beacon node gets the execution payload from its paired execution node, it must to provide an unblinded block. If the execution payload header is obtained from a MEV relay, then it is required to return a blinded block.
The response's metadata describes the kind of block that was created, and as forks advance, more block types will be added to the list of supported types.
Example Request and Result for /v3/validator/blocks/:slot:
In this section, we provide an illustrative example of a request made to retrieve details contents using the /v3/validator/blocks/{slot} endpoint. Additionally, we present the resulting response containing information about producing a new block without signature.
Parameters
| Fields | Type | Description |
|---|---|---|
slot* | string | The slot for which the block should be proposed. |
randao_reveal* | string | The validator's randao reveal value. |
| graffiti | string | Arbitrary data validator wants to include in block. |
| skip_randao_verification | query | Skip verification of the |
| builder_boost_factor | string | Percentage multiplier to apply to the builder's payload value when choosing between a builder payload header and payload from the paired execution node. |
More info about builder_boost_factor param:
This parameter is only relevant if the beacon node is connected to a builder, deems it safe to produce a builder payload, and receives valid responses from both the builder endpoint and the paired execution node. When these preconditions are met, the server MUST act as follows:
- if
exec_node_payload_value >= builder_boost_factor * (builder_payload_value // 100), then return a full (unblinded) block containing the execution node payload. - otherwise, return a blinded block containing the builder payload header.
Servers must support the following values of the boost factor which encode common preferences:
builder_boost_factor=0: prefer the execution node payload unless an error makes it unviable.builder_boost_factor=100: default profit maximization mode; choose whichever payload pays more.builder_boost_factor=2**64 - 1: prefer the builder payload unless an error or beacon node health check makes it unviable.
In order to prevent overflows or mistakes caused by large values of the builder_boost_factor, servers should employ saturating arithmetic or an alternative method. The beacon node MUST react with a complete block if this argument is given and it is not equipped with a builder; the caller may choose to reject it. This parameter should be interpreted as having the default value of 100 if it is not supplied. An error response with status code 400 MUST be returned if the value is supplied but outside of range for a 64-bit unsigned integer.\
The example in this section uses a non-existing project id.
Make sure you replace it with your Ethereum Holesky Beacon endpoint when issuing the API calls.
Don't have a project id? Here's a straightforward guide on how to obtain one!
Produce a new block, without signature
GET https://eth-holesky-beacon.blastapi.io/<project-id>/eth/v3/validator/blocks/{slot}
Path Parameters
| Name | Type | Description |
|---|---|---|
| slot* | string | 1 |
Query Parameters
| Name | Type | Description |
|---|---|---|
| randao_reveal* | string | 0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505 |
| graffiti | string | Arbitrary data validator wants to include in block. |
| skip_randao_verification | string | |
| builder_boost_factor | string | 1 |
- 200: OK Expand for a detailed response example
{
"version": "phase0",
"execution_payload_blinded": false,
"execution_payload_value": "12345",
"consensus_block_value": "12345",
"data": {
"slot": "1",
"proposer_index": "1",
"parent_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"state_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"body": {
"randao_reveal": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505",
"eth1_data": {
"deposit_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"deposit_count": "1",
"block_hash": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
},
"graffiti": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"proposer_slashings": [
{
"signed_header_1": {
"message": {
"slot": "1",
"proposer_index": "1",
"parent_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"state_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"body_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
},
"signature": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"
},
"signed_header_2": {
"message": {
"slot": "1",
"proposer_index": "1",
"parent_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"state_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"body_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
},
"signature": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"
}
}
],
"attester_slashings": [
{
"attestation_1": {
"attesting_indices": [
"1"
],
"signature": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505",
"data": {
"slot": "1",
"index": "1",
"beacon_block_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"source": {
"epoch": "1",
"root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
},
"target": {
"epoch": "1",
"root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
}
}
},
"attestation_2": {
"attesting_indices": [
"1"
],
"signature": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505",
"data": {
"slot": "1",
"index": "1",
"beacon_block_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"source": {
"epoch": "1",
"root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
},
"target": {
"epoch": "1",
"root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
}
}
}
}
],
"attestations": [
{
"aggregation_bits": "0x01",
"signature": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505",
"data": {
"slot": "1",
"index": "1",
"beacon_block_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"source": {
"epoch": "1",
"root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
},
"target": {
"epoch": "1",
"root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
}
}
}
],
"deposits": [
{
"proof": [
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
],
"data": {
"pubkey": "0x93247f2209abcacf57b75a51dafae777f9dd38bc7053d1af526f220a7489a6d3a2753e5f3e8b1cfe39b56f43611df74a",
"withdrawal_credentials": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
"amount": "1",
"signature": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"
}
}
],
"voluntary_exits": [
{
"message": {
"epoch": "1",
"validator_index": "1"
},
"signature": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"
}
]
}
}
}
Curl Request example
curl -X 'GET' \
'https://eth-holesky-beacon.blastapi.io/<project-id>/eth/v3/validator/blocks/1?randao_reveal=0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505&graffiti=0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2&skip_randao_verification=&builder_boost_factor=1' \
-H 'accept: application/json'