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✨ intro: add interface #2

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✨ intro: add interface #2

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15 changes: 15 additions & 0 deletions core/vm/contracts.go
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,10 @@ var PrecompiledContractsBLS = map[common.Address]PrecompiledContract{
common.BytesToAddress([]byte{18}): &bls12381MapG2{},
}

var PrecompiledContractsNC = map[common.Address]PrecompiledContract{
common.BytesToAddress([]byte{20}): &nCBlockVerify{},
}

var (
PrecompiledAddressesFjord []common.Address
PrecompiledAddressesCancun []common.Address
Expand Down Expand Up @@ -1191,3 +1195,14 @@ func (c *p256Verify) Run(input []byte) ([]byte, error) {
return nil, nil
}
}

type nCBlockVerify struct{}

func (c *nCBlockVerify) RequiredGas(input []byte) uint64 {
return params.NCBlockVerifyGas
}

func (c *nCBlockVerify) Run(input []byte) ([]byte, error) {
block := input[:32]
return common.LeftPadBytes(block, 32), nil
}
2 changes: 2 additions & 0 deletions params/protocol_params.go
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Expand Up @@ -168,6 +168,8 @@ const (

P256VerifyGas uint64 = 3450 // secp256r1 elliptic curve signature verifier gas price

NCBlockVerifyGas uint64 = 100000 // Gas price for verifying a NineChronicles block

// The Refund Quotient is the cap on how much of the used gas can be refunded. Before EIP-3529,
// up to half the consumed gas could be refunded. Redefined as 1/5th in EIP-3529
RefundQuotient uint64 = 2
Expand Down