69 lines
2.1 KiB
Nim
69 lines
2.1 KiB
Nim
import ../db/[db_chain, state_db], ../transaction, eth_common,
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../vm_state, ../vm_types, ../vm_state_transactions, ranges,
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chronicles, ../vm/[computation, interpreter_dispatch, message]
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proc processTransaction*(db: var AccountStateDB, t: Transaction, sender: EthAddress, vmState: BaseVMState): UInt256 =
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## Process the transaction, write the results to db.
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## Returns amount of ETH to be rewarded to miner
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trace "Sender", sender
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trace "txHash", rlpHash = t.rlpHash
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# Inct nonce:
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db.setNonce(sender, db.getNonce(sender) + 1)
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var transactionFailed = false
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#t.dump
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# TODO: combine/refactor re validate
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let upfrontGasCost = t.gasLimit.u256 * t.gasPrice.u256
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let upfrontCost = upfrontGasCost + t.value
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var balance = db.getBalance(sender)
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if balance < upfrontCost:
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if balance <= upfrontGasCost:
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result = balance
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balance = 0.u256
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else:
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result = upfrontGasCost
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balance -= upfrontGasCost
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transactionFailed = true
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else:
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balance -= upfrontCost
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db.setBalance(sender, balance)
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if transactionFailed:
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return
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var gasUsed = t.payload.intrinsicGas.GasInt # += 32000 appears in Homestead when contract create
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if gasUsed > t.gasLimit:
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debug "Transaction failed. Out of gas."
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transactionFailed = true
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else:
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if t.isContractCreation:
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# TODO: re-derive sender in callee for cleaner interface, perhaps
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return applyCreateTransaction(db, t, vmState, sender)
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else:
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let code = db.getCode(t.to)
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if code.len == 0:
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# Value transfer
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trace "Transfer", value = t.value, sender, to = t.to
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db.addBalance(t.to, t.value)
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else:
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# Contract call
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trace "Contract call"
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trace "Transaction", sender, to = t.to, value = t.value, hasCode = code.len != 0
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let msg = newMessage(t.gasLimit, t.gasPrice, t.to, sender, t.value, t.payload, code.toSeq)
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# TODO: Run the vm
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if gasUsed > t.gasLimit:
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gasUsed = t.gasLimit
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var refund = (t.gasLimit - gasUsed).u256 * t.gasPrice.u256
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if transactionFailed:
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refund += t.value
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db.addBalance(sender, refund)
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return gasUsed.u256 * t.gasPrice.u256
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