Public identification
Key identifiers
Blocks built by BuilderNet nodes expose these key identifiers:
| Identifier | Description |
|---|---|
| Extra data | BuilderNet (<Operator>) |
| Coinbase signing key | For signing the block and the proposer payment transaction. Also to accrue MEV value, which is later redistributed to users. Currently the coinbase signing key is common across builder instances and has the address 0xdadB0d80178819F2319190D340ce9A924f783711 (ENS: buildernet.eth). |
| Relay submission keys | Two BLS keys are used by each builder instance to sign bids submitted to relays, one for optimistic mode and one for non-optimistic submissions. These keys are unique per builder node. |
| Refund transactions | Refunds are sent from address 0x62A29205f7Ff00F4233d9779c210150787638E7f (ENS: refunds.buildernet.eth) |
BLS keys for submitting blocks to MEV-Boost relays
| Operator | Signing key address |
|---|---|
| Flashbots (regular) | 0x850a00ffd1319a04114cff3793f8403ccbf026e0cf67ddca2f9fbb1a03e056a916becc686cdfe7714b111e35c92a74cf |
| Flashbots (optimistic) | 0x850b00e055388c1b56f137e0852bc02d8b05534e9f96dd1d11cff8cf0481b800ecc2e708cdc158cd95b7cfdaa6840ee7 |
| Nethermind (regular) | 0x851a009553c46cae9384ebc59dcf17064ee8839de085910ec71d834ab1b8dc7a1f3271008c2438ae3b3e44be994108a6 |
| Nethermind (optimistic) | 0x851b00b12f73770337fbd219b439aba7bd8e770dbdea16a3b0df030d971bc0d824d470d7868e5d93355f501bfe892947 |
| Beaverbuild (regular) | 0x852a00817dd13ce36535855192e218ccad6d489f90605c501fd4294940550592426552006ebd44f0e661b73d58a9765c |
| Beaverbuild (optimistic) | 0x852b0070e2522fcb06dcb159fabcdc7a4b5e1221cc2a56b083577cce03e50afe1b699c5a1111eb3bb1b8684aa90a8333 |