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wip: new usage of eth_simulateV1 #2860

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78dee23
wip: new usage of eth_simulateV1
calbera Jul 14, 2025
b461297
Merge branch 'main' into simulate-v1
calbera Aug 12, 2025
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22 changes: 12 additions & 10 deletions testing/simulated/execution/simulation_client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@ import (

"github.com/berachain/beacon-kit/execution/client"
gethprimitives "github.com/berachain/beacon-kit/geth-primitives"
"github.com/berachain/beacon-kit/primitives/crypto"
"github.com/berachain/beacon-kit/primitives/encoding/json"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
Expand Down Expand Up @@ -66,16 +67,17 @@ type TransactionArgs struct {

// BlockOverrides holds optional block-level overrides for simulation.
type BlockOverrides struct {
Number *hexutil.Big `json:"number,omitempty"`
Difficulty *hexutil.Big `json:"difficulty,omitempty"`
Time *hexutil.Uint64 `json:"time,omitempty"`
GasLimit *hexutil.Uint64 `json:"gasLimit,omitempty"`
FeeRecipient *common.Address `json:"feeRecipient,omitempty"`
PrevRandao *common.Hash `json:"prevRandao,omitempty"`
BaseFeePerGas *hexutil.Big `json:"baseFeePerGas,omitempty"`
BlobBaseFee *hexutil.Big `json:"blobBaseFee,omitempty"`
BeaconRoot *common.Hash `json:"beaconRoot,omitempty"`
Withdrawals gethprimitives.Withdrawals
Number *hexutil.Big `json:"number,omitempty"`
Difficulty *hexutil.Big `json:"difficulty,omitempty"`
Time *hexutil.Uint64 `json:"time,omitempty"`
GasLimit *hexutil.Uint64 `json:"gasLimit,omitempty"`
FeeRecipient *common.Address `json:"feeRecipient,omitempty"`
PrevRandao *common.Hash `json:"prevRandao,omitempty"`
BaseFeePerGas *hexutil.Big `json:"baseFeePerGas,omitempty"`
BlobBaseFee *hexutil.Big `json:"blobBaseFee,omitempty"`
BeaconRoot *common.Hash `json:"beaconRoot,omitempty"`
Withdrawals *gethprimitives.Withdrawals
ProposerPubkey *crypto.BLSPubkey
}

// SimBlock is a block containing calls and optional overrides for simulation.
Expand Down
3 changes: 2 additions & 1 deletion testing/simulated/utils.go
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Expand Up @@ -208,7 +208,7 @@ func DefaultSimulationInput(
overrideBaseFeePerGas := origBlock.GetBody().GetExecutionPayload().GetBaseFeePerGas().ToBig()
overrideBeaconRoot := gethcommon.HexToHash(origBlock.GetParentBlockRoot().Hex())
origWithdrawls := origBlock.GetBody().GetExecutionPayload().GetWithdrawals()
overrideWithdrawals := *(*gethtypes.Withdrawals)(unsafe.Pointer(&origWithdrawls))
overrideWithdrawals := (*gethtypes.Withdrawals)(unsafe.Pointer(&origWithdrawls))

calls, err := execution.TxsToTransactionArgs(chainSpec.DepositEth1ChainID(), txs)
require.NoError(t, err)
Expand All @@ -224,6 +224,7 @@ func DefaultSimulationInput(
BaseFeePerGas: (*hexutil.Big)(overrideBaseFeePerGas),
BeaconRoot: &overrideBeaconRoot,
Withdrawals: overrideWithdrawals,
// TODO: Get the override proposer pubkey from beacon state.
// TODO: Do we need to override blob base fee?
},
},
Expand Down
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