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Bittensor EVM: Examples and Precompiles

Available Precompiles

The following precompiles are available on the Bittensor EVM.

Code examples used throughout are provided by OTF, and come from this repository.

Standard Ethereum Precompiles

• ECRecover (0x1): Recover the address associated with the public key from elliptic curve signature
• Sha256 (0x2): SHA-256 hash function
• Ripemd160 (0x3): RIPEMD-160 hash function
• Identity (0x4): Identity function (returns input data)
• Modexp (0x5): Modular exponentiation
• Sha3FIPS256 (0x400): SHA3-256 hash function (FIPS variant)
• ECRecoverPublicKey (0x401): Recover the public key from an elliptic curve signature

Bittensor-Specific Precompiles

• Ed25519Verify: Verify Ed25519 signatures
• BalanceTransfer: Transfer TAO between accounts
• StakingPrecompile: Manage staking operations
• StakingPrecompileV2 (0x805): Main staking operations including:
  • addStake: Add stake to a hotkey
  • removeStake: Remove stake from a hotkey
  • moveStake: Move stake between hotkeys
  • transferStake: Transfer stake between coldkeys
  • getTotalColdkeyStake: Get total stake for a coldkey
  • getTotalHotkeyStake: Get total stake for a hotkey
  • getStake: Get stake between specific hotkey and coldkey
  • addProxy: Add a proxy delegate
  • removeProxy: Remove a proxy delegate
• SubnetPrecompile: Manage subnet operations
• MetagraphPrecompile: Interact with the metagraph
• NeuronPrecompile: Manage neuron operations