On Ethereum, precompiled smart contracts 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.

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CodeOracle

Emulates EVM’s extcodecopy opcode.

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SHA256

Emulates the EVM’s sha256 precompile.

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KECCAK256

Emulates the EVM’s keccak256 opcode.

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Elliptic Curve Precompiles

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

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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 precompile.

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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 precompile.

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EcPairing

Precompile for computing bilinear pairings on elliptic curve groups.

Emulates the EVM’s ecpairing precompile.

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Ecrecover

Emulates the EVM’s ecrecover precompile.

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P256Verify (secp256r1 / RIP-7212)

The contract that emulates RIP-7212’s P256VERIFY precompile.

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