> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abs.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Precompiles

> Learn how Abstract differs from Ethereum's precompiled smart contracts.

On Ethereum, [precompiled smart contracts](https://www.evm.codes/)
are contracts embedded into the EVM at predetermined addresses
that typically perform computationally expensive operations
that are not already included in EVM opcodes.

Abstract has support for these EVM precompiles and more, however some
have different behavior than on Ethereum.

## CodeOracle

Emulates EVM’s [extcodecopy](https://www.evm.codes/#3c?fork=cancun) opcode.

<Card title="CodeOracle source code" icon="github" href="https://github.com/matter-labs/era-contracts/tree/main/system-contracts/contracts/precompiles/CodeOracle.yul">
  View the source code for the CodeOracle precompile on GitHub.
</Card>

## SHA256

Emulates the EVM’s [sha256](https://www.evm.codes/precompiled#0x02?fork=cancun) precompile.

<Card title="SHA256 source code" icon="github" href="https://github.com/matter-labs/era-contracts/tree/main/system-contracts/contracts/precompiles/SHA256.yul">
  View the source code for the SHA256 precompile on GitHub.
</Card>

## KECCAK256

Emulates the EVM’s [keccak256](https://www.evm.codes/#20?fork=cancun) opcode.

<Card title="KECCAK256 source code" icon="github" href="https://github.com/matter-labs/era-contracts/tree/main/system-contracts/contracts/precompiles/Keccak256.yul">
  View the source code for the KECCAK256 precompile on GitHub.
</Card>

## Elliptic Curve Precompiles

Precompiled smart contracts for elliptic curve operations are required to perform zkSNARK verification.

### EcAdd

Precompile for computing elliptic curve point addition.
The points are represented in affine form, given by a pair of coordinates (x,y).

Emulates the EVM’s [ecadd](https://www.evm.codes/precompiled#0x06?fork=cancun) precompile.

<Card title="EcAdd source code" icon="github" href="https://github.com/matter-labs/era-contracts/tree/main/system-contracts/contracts/precompiles/EcAdd.yul">
  View the source code for the EcAdd precompile on GitHub.
</Card>

### EcMul

Precompile for computing elliptic curve point scalar multiplication.
The points are represented in homogeneous projective coordinates, given by the coordinates (x,y,z).

Emulates the EVM’s [ecmul](https://www.evm.codes/precompiled#0x07?fork=cancun) precompile.

<Card title="EcMul source code" icon="github" href="https://github.com/matter-labs/era-contracts/tree/main/system-contracts/contracts/precompiles/EcMul.yul">
  View the source code for the EcMul precompile on GitHub.
</Card>

### EcPairing

Precompile for computing bilinear pairings on elliptic curve groups.

Emulates the EVM’s [ecpairing](https://www.evm.codes/precompiled#0x08?fork=cancun) precompile.

<Card title="EcPairing source code" icon="github" href="https://github.com/matter-labs/era-contracts/tree/main/system-contracts/contracts/precompiles/EcPairing.yul">
  View the source code for the EcPairing precompile on GitHub.
</Card>

### Ecrecover

Emulates the EVM’s [ecrecover](https://www.evm.codes/precompiled#0x01?fork=cancun) precompile.

<Card title="Ecrecover source code" icon="github" href="https://github.com/matter-labs/era-contracts/tree/main/system-contracts/contracts/precompiles/Ecrecover.yul">
  View the source code for the Ecrecover precompile on GitHub.
</Card>

### P256Verify (secp256r1 / RIP-7212)

The contract that emulates [RIP-7212’s](https://github.com/ethereum/RIPs/blob/master/RIPS/rip-7212.md) P256VERIFY precompile.

This adds a precompiled contract which is similar to [ecrecover](#ecrecover)
to provide signature verifications using the “secp256r1” elliptic curve.

<Card title="P256Verify source code" icon="github" href="https://github.com/matter-labs/era-contracts/tree/main/system-contracts/contracts/precompiles/P256Verify.yul">
  View the source code for the P256Verify precompile on GitHub.
</Card>