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separate precompiles for mint/burn

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This commit is contained in:
Shawn 2023-11-21 17:17:58 -08:00
parent 3dd54b5e4a
commit 812972c832
2 changed files with 46 additions and 17 deletions
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18
core/vm/contracts.go
View file

@ -49,7 +49,8 @@ var PrecompiledContractsHomestead = map[common.Address]PrecompiledContractWithCt
common.BytesToAddress([]byte{2}): precompileWrapper{&sha256hash{}},
common.BytesToAddress([]byte{3}): precompileWrapper{&ripemd160hash{}},
common.BytesToAddress([]byte{4}): precompileWrapper{&dataCopy{}},
common.BytesToAddress([]byte{0x89}): &transfer{},
common.BytesToAddress([]byte{0x89}): &mint{},
common.BytesToAddress([]byte{0x90}): &burn{},
}
// PrecompiledContractsByzantium contains the default set of pre-compiled Ethereum
@ -63,7 +64,8 @@ var PrecompiledContractsByzantium = map[common.Address]PrecompiledContractWithCt
common.BytesToAddress([]byte{6}): precompileWrapper{&bn256AddByzantium{}},
common.BytesToAddress([]byte{7}): precompileWrapper{&bn256ScalarMulByzantium{}},
common.BytesToAddress([]byte{8}): precompileWrapper{&bn256PairingByzantium{}},
common.BytesToAddress([]byte{0x89}): &transfer{},
common.BytesToAddress([]byte{0x89}): &mint{},
common.BytesToAddress([]byte{0x90}): &burn{},
}
// PrecompiledContractsIstanbul contains the default set of pre-compiled Ethereum
@ -78,7 +80,8 @@ var PrecompiledContractsIstanbul = map[common.Address]PrecompiledContractWithCtx
common.BytesToAddress([]byte{7}): precompileWrapper{&bn256ScalarMulIstanbul{}},
common.BytesToAddress([]byte{8}): precompileWrapper{&bn256PairingIstanbul{}},
common.BytesToAddress([]byte{9}): precompileWrapper{&blake2F{}},
common.BytesToAddress([]byte{0x89}): &transfer{},
common.BytesToAddress([]byte{0x89}): &mint{},
common.BytesToAddress([]byte{0x90}): &burn{},
}
// PrecompiledContractsBerlin contains the default set of pre-compiled Ethereum
@ -93,7 +96,8 @@ var PrecompiledContractsBerlin = map[common.Address]PrecompiledContractWithCtx{
common.BytesToAddress([]byte{7}): precompileWrapper{&bn256ScalarMulIstanbul{}},
common.BytesToAddress([]byte{8}): precompileWrapper{&bn256PairingIstanbul{}},
common.BytesToAddress([]byte{9}): precompileWrapper{&blake2F{}},
common.BytesToAddress([]byte{0x89}): &transfer{},
common.BytesToAddress([]byte{0x89}): &mint{},
common.BytesToAddress([]byte{0x90}): &burn{},
}
// PrecompiledContractsCancun contains the default set of pre-compiled Ethereum
@ -109,7 +113,8 @@ var PrecompiledContractsCancun = map[common.Address]PrecompiledContractWithCtx{
common.BytesToAddress([]byte{8}): precompileWrapper{&bn256PairingIstanbul{}},
common.BytesToAddress([]byte{9}): precompileWrapper{&blake2F{}},
common.BytesToAddress([]byte{0x0a}): precompileWrapper{&kzgPointEvaluation{}},
common.BytesToAddress([]byte{0x89}): &transfer{},
common.BytesToAddress([]byte{0x89}): &mint{},
common.BytesToAddress([]byte{0x90}): &burn{},
}
// PrecompiledContractsBLS contains the set of pre-compiled Ethereum
@ -124,7 +129,8 @@ var PrecompiledContractsBLS = map[common.Address]PrecompiledContractWithCtx{
common.BytesToAddress([]byte{16}): precompileWrapper{&bls12381Pairing{}},
common.BytesToAddress([]byte{17}): precompileWrapper{&bls12381MapG1{}},
common.BytesToAddress([]byte{18}): precompileWrapper{&bls12381MapG2{}},
common.BytesToAddress([]byte{0x89}): &transfer{},
common.BytesToAddress([]byte{0x89}): &mint{},
common.BytesToAddress([]byte{0x90}): &burn{},
}
var (

45
core/vm/contracts_with_ctx.go
View file

@ -69,20 +69,18 @@ var mockEVM = &EVM{
TxContext: vmTxCtx,
}
// Native transfer precompile to make bridging to native token possible.
type transfer struct{}
// Native token mint precompile to make bridging to native token possible.
type mint struct{}
func (c *transfer) RequiredGas(input []byte) uint64 {
func (c *mint) RequiredGas(input []byte) uint64 {
// TODO: determine appropriate gas cost
return 100
}
func (c *transfer) Run(input []byte, ctx *precompileContext) ([]byte, error) {
func (c *mint) Run(input []byte, ctx *precompileContext) ([]byte, error) {
// TODO: filter out non-allowed callers
// From
_ = common.BytesToAddress(input[0:32])
_ = common.BytesToAddress(input[0:32]) // From
to := common.BytesToAddress(input[32:64])
@ -95,10 +93,35 @@ func (c *transfer) Run(input []byte, ctx *precompileContext) ([]byte, error) {
// Mint case: Create native token out of thin air
ctx.evm.StateDB.AddBalance(to, value)
// if !ctx.CanTransfer(ctx.evm.StateDB, from, value) {
// return nil, ErrInsufficientBalance
// }
// ctx.Transfer(ctx.evm, from, to, value)
return input, nil
}
// Native token burn precompile to make bridging back to L1 possible.
type burn struct{}
func (c *burn) RequiredGas(input []byte) uint64 {
// TODO: determine appropriate gas cost
return 100
}
func (c *burn) Run(input []byte, ctx *precompileContext) ([]byte, error) {
// TODO: filter out non-allowed callers
_ = common.BytesToAddress(input[0:32]) // From
// Address to get their tokens burned
addrReqTokenBurn := common.BytesToAddress(input[32:64])
var parsed bool
value, parsed := math.ParseBig256(hexutil.Encode(input[64:96]))
if !parsed {
return nil, fmt.Errorf("Error parsing transfer: unable to parse value from " + hexutil.Encode(input[64:96]))
}
if !ctx.CanTransfer(ctx.evm.StateDB, addrReqTokenBurn, value) {
return nil, ErrInsufficientBalance
}
ctx.evm.StateDB.SubBalance(addrReqTokenBurn, value)
return input, nil
}