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casper-spec.ini
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casper-spec.ini
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; casper commit: master b2a1189
; vyper commit: master 7b1e018 vyper -f bytecode_runtime simple_casper.v.py
; k commit: casper 5c25763980fd52c92c637395a7fd64e561569512
; kevm commit: master 777c67828c5b26f39112bad709e9a65a337f7de5
[root]
comment:
k: (#execute => #halt) ~> _
callStack: _
wordStack: .WordStack => _
localMem: .Map => _
pc: 0 => _
gas: 1000000 => _
memoryUsed: 0 => _
callDepth: CD
log: _
refund: _
coinbase: _
activeAccounts: SetItem(CASPER_ACCT_ID) _:Set
casperBalance: CASPER_BAL
accounts:
requires:
andBool #range(0 <= CD < 1024)
andBool #rangeUInt(256, CASPER_BAL)
ensures:
attribute:
[recommended_source_epoch]
output: _ => #asByteStackInWidth(EXPECTED_SOURCE_EPOCH, 32)
statusCode: _ => EVMC_SUCCESS
callData: #abiCallData("recommended_source_epoch", .TypedArgs)
callValue: 0
storage:
// self.expected_source_epoch : int128
(#hashedLocation({COMPILER}, {EXPECTED_SOURCE_EPOCH}, .IntList) |-> EXPECTED_SOURCE_EPOCH)
_:Map
+requires:
// Range
andBool #rangeSInt(128, EXPECTED_SOURCE_EPOCH)
// Invariant
andBool EXPECTED_SOURCE_EPOCH >=Int 0
[recommended_target_hash]
gas: GCAP => _
callData: #abiCallData("recommended_target_hash", .TypedArgs)
callValue: 0
storage:
// self.current_epoch
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> CURRENT_EPOCH)
// self.EPOCH_LENGTH
(#hashedLocation({COMPILER}, {EPOCH_LENGTH}, .IntList) |-> EPOCH_LENGTH)
_:Map
+requires:
// Range
andBool #rangeSInt(128, CURRENT_EPOCH)
andBool #rangeSInt(128, EPOCH_LENGTH)
// Invariant
andBool CURRENT_EPOCH >Int 0
andBool EPOCH_LENGTH >Int 0
// Gas
andBool GCAP >=Int 893
[recommended_target_hash-success]
output: _ => #asByteStackInWidth(#recommendedBlockHash(BLOCK_HASHES, BLOCK_NUM, CURRENT_EPOCH, EPOCH_LENGTH), 32)
statusCode: _ => EVMC_SUCCESS
gas: GCAP => GCAP -Int 893
+requires:
// Overflow check
andBool (CURRENT_EPOCH *Int EPOCH_LENGTH) <=Int maxSInt128
andBool #range(BLOCK_NUM -Int 256 <= #expectedBlockNumber(CURRENT_EPOCH, EPOCH_LENGTH) < BLOCK_NUM)
[recommended_target_hash-failure]
output: _ => _
[recommended_target_hash-failure-11]
statusCode: _ => EVMC_REVERT
+requires:
andBool (CURRENT_EPOCH *Int EPOCH_LENGTH) <=Int maxSInt128
andBool #expectedBlockNumber(CURRENT_EPOCH, EPOCH_LENGTH) >=Int BLOCK_NUM
[recommended_target_hash-failure-12]
statusCode: _ => EVMC_REVERT
+requires:
andBool (CURRENT_EPOCH *Int EPOCH_LENGTH) <=Int maxSInt128
andBool #expectedBlockNumber(CURRENT_EPOCH, EPOCH_LENGTH) <Int BLOCK_NUM -Int 256
[recommended_target_hash-failure-2]
statusCode: _ => EVMC_BAD_JUMP_DESTINATION
+requires:
andBool (CURRENT_EPOCH *Int EPOCH_LENGTH) >Int maxSInt128
[deposit_exists]
callData: #abiCallData("deposit_exists", .TypedArgs)
callValue: 0
[deposit_exists-success]
statusCode: _ => EVMC_SUCCESS
storage:
// self.total_curdyn_deposits : decimal
(#hashedLocation({COMPILER}, {TOTAL_CURDYN_DEPOSITS}, .IntList) |-> TOTAL_CURDYN_DEPOSITS)
// self.total_prevdyn_deposits : decimal
(#hashedLocation({COMPILER}, {TOTAL_PREVDYN_DEPOSITS}, .IntList) |-> TOTAL_PREVDYN_DEPOSITS)
_:Map
+requires:
// Range
andBool #rangeSFixed(128, 10, TOTAL_CURDYN_DEPOSITS)
andBool #rangeSFixed(128, 10, TOTAL_PREVDYN_DEPOSITS)
// Invariant
andBool TOTAL_CURDYN_DEPOSITS >=Int 0
andBool TOTAL_PREVDYN_DEPOSITS >=Int 0
//
andBool CALLER_ID ==Int CASPER_ACCT_ID
[deposit_exists-failure]
output: _ => _
statusCode: _ => EVMC_INVALID
storage:
_:Map
+requires:
andBool CALLER_ID =/=Int CASPER_ACCT_ID
[deposit_exists-success-true]
output: _ => #asByteStackInWidth(1, 32)
+requires:
andBool TOTAL_CURDYN_DEPOSITS >Int 0
andBool TOTAL_PREVDYN_DEPOSITS >Int 0
[deposit_exists-success-false-1]
output: _ => #asByteStackInWidth(0, 32)
+requires:
andBool TOTAL_CURDYN_DEPOSITS <=Int 0
[deposit_exists-success-false-2]
output: _ => #asByteStackInWidth(0, 32)
+requires:
andBool TOTAL_CURDYN_DEPOSITS >Int 0
andBool TOTAL_PREVDYN_DEPOSITS <=Int 0
; def main_hash_voted_frac() -> decimal:
; return min(self.votes[self.current_epoch].cur_dyn_votes[self.expected_source_epoch] / self.total_curdyn_deposits,
; self.votes[self.current_epoch].prev_dyn_votes[self.expected_source_epoch] / self.total_prevdyn_deposits)
; Possible cases:
; 1. RESULT_1 <=Int RESULT_2,
; 2. RESULT_1 >Int RESULT_2,
; 3. one of {TOTAL_CURDYN_DEPOSITS_VAL, TOTAL_PREVDYN_DEPOSITS_VAL} is 0.
;
[main_hash_voted_frac]
output: _ => _
memoryUsed: 0 => _
callDepth: CD
callStack: _
callData: #abiCallData("main_hash_voted_frac", .TypedArgs)
callValue: 0
wordStack: .WordStack => _
localMem: .Map => _:Map
pc: 0 => _
gas: 100000 => _
log: _
refund: _
coinbase: _
activeAccounts: _
casperBalance: _
storage:
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> CURRENT_EPOCH_VAL)
(#hashedLocation({COMPILER}, {EXPECTED_SOURCE_EPOCH}, .IntList) |-> EXPECTED_SOURCE_EPOCH_VAL)
(#hashedLocation({COMPILER}, {VOTES}, CURRENT_EPOCH_VAL {CUR_DYN_VOTES} EXPECTED_SOURCE_EPOCH_VAL) |-> CUR_DYN_VOTES_VAL)
(#hashedLocation({COMPILER}, {VOTES}, CURRENT_EPOCH_VAL {PREV_DYN_VOTES} EXPECTED_SOURCE_EPOCH_VAL) |-> PREV_DYN_VOTES_VAL)
(#hashedLocation({COMPILER}, {TOTAL_CURDYN_DEPOSITS}, .IntList) |-> TOTAL_CURDYN_DEPOSITS_VAL)
(#hashedLocation({COMPILER}, {TOTAL_PREVDYN_DEPOSITS}, .IntList) |-> TOTAL_PREVDYN_DEPOSITS_VAL)
_:Map
accounts:
requires:
andBool #rangeSInt(128, CURRENT_EPOCH_VAL)
andBool #rangeSInt(128, EXPECTED_SOURCE_EPOCH_VAL)
andBool #rangeSFixed(128, 10, CUR_DYN_VOTES_VAL)
andBool #rangeSFixed(128, 10, PREV_DYN_VOTES_VAL)
andBool #rangeSFixed(128, 10, TOTAL_CURDYN_DEPOSITS_VAL)
andBool #rangeSFixed(128, 10, TOTAL_PREVDYN_DEPOSITS_VAL)
andBool #range(0 <= CD < 1024)
andBool CURRENT_EPOCH_VAL >=Int 0
andBool EXPECTED_SOURCE_EPOCH_VAL >=Int 0
andBool CUR_DYN_VOTES_VAL >=Int 0
andBool PREV_DYN_VOTES_VAL >=Int 0
andBool TOTAL_CURDYN_DEPOSITS_VAL >=Int 0
andBool TOTAL_PREVDYN_DEPOSITS_VAL >=Int 0
/*votes in a dinasty will always be just a fraction of total deposits*/
andBool CUR_DYN_VOTES_VAL <=Int TOTAL_CURDYN_DEPOSITS_VAL
andBool PREV_DYN_VOTES_VAL <=Int TOTAL_PREVDYN_DEPOSITS_VAL
ensures:
attribute:
[main_hash_voted_frac-success-1]
k: (#execute => #halt) ~> _
statusCode: _ => EVMC_SUCCESS
output: _ => #asByteStackInWidth(RESULT_1, 32)
+requires:
andBool TOTAL_CURDYN_DEPOSITS_VAL =/=Int 0
andBool TOTAL_PREVDYN_DEPOSITS_VAL =/=Int 0
andBool RESULT_1 ==Int (CUR_DYN_VOTES_VAL *Int VYPER_DEC_MULTIPLIER /Int TOTAL_CURDYN_DEPOSITS_VAL)
andBool RESULT_2 ==Int (PREV_DYN_VOTES_VAL *Int VYPER_DEC_MULTIPLIER /Int TOTAL_PREVDYN_DEPOSITS_VAL)
andBool RESULT_1 <=Int RESULT_2
ensures:
ensures 0 <=Int RESULT_1 andBool RESULT_1 <=Int VYPER_DEC_MULTIPLIER
[main_hash_voted_frac-success-2]
k: (#execute => #halt) ~> _
statusCode: _ => EVMC_SUCCESS
output: _ => #asByteStackInWidth(RESULT_2, 32)
+requires:
andBool TOTAL_CURDYN_DEPOSITS_VAL =/=Int 0
andBool TOTAL_PREVDYN_DEPOSITS_VAL =/=Int 0
andBool RESULT_1 ==Int (CUR_DYN_VOTES_VAL *Int VYPER_DEC_MULTIPLIER /Int TOTAL_CURDYN_DEPOSITS_VAL)
andBool RESULT_2 ==Int (PREV_DYN_VOTES_VAL *Int VYPER_DEC_MULTIPLIER /Int TOTAL_PREVDYN_DEPOSITS_VAL)
andBool RESULT_1 >Int RESULT_2
ensures:
ensures 0 <=Int RESULT_2 andBool RESULT_2 <=Int VYPER_DEC_MULTIPLIER
[main_hash_voted_frac-failure]
k: (#execute => #halt) ~> _
statusCode: _ => EVMC_REVERT
+requires:
andBool (TOTAL_CURDYN_DEPOSITS_VAL ==Int 0 orBool TOTAL_PREVDYN_DEPOSITS_VAL ==Int 0)
;def total_curdyn_deposits_scaled() -> wei_value:
; return floor(self.total_curdyn_deposits * self.deposit_scale_factor[self.current_epoch])
[total_curdyn_deposits_scaled]
comment:
k: (#execute => #halt) ~> _
output: _ => _
callStack: _
callData: #abiCallData("total_curdyn_deposits_scaled", .TypedArgs)
callValue: 0
wordStack: .WordStack => _
localMem: .Map => _
pc: 0 => _
gas: 100000 => _
memoryUsed: 0 => _
callDepth: CD
log: _
refund: _
coinbase: _
activeAccounts: _
casperBalance: _
storage:
// self.total_curdyn_deposits : decimal
(#hashedLocation({COMPILER}, {TOTAL_CURDYN_DEPOSITS}, .IntList) |-> TOTAL_CURDYN_DEPOSITS)
// self.current_epoch : int128
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> CURRENT_EPOCH)
//self.deposit_scale_factor[self.current_epoch] : decimal
(#hashedLocation({COMPILER}, {DEPOSIT_SCALE_FACTOR}, CURRENT_EPOCH) |-> CUR_EPOCH_SCALE_FACTOR)
_:Map
accounts:
requires:
andBool #rangeSFixed(128, 10, TOTAL_CURDYN_DEPOSITS)
andBool #rangeSInt(128, CURRENT_EPOCH)
andBool #rangeSFixed(128, 10, CUR_EPOCH_SCALE_FACTOR)
andBool #range(0 <= CD < 1024)
andBool TOTAL_CURDYN_DEPOSITS >=Int 0
andBool CURRENT_EPOCH >=Int 0
andBool CUR_EPOCH_SCALE_FACTOR >Int 0
attribute:
ensures:
[total_curdyn_deposits_scaled-success]
output: _ => #asByteStackInWidth(RESULT, 32)
statusCode: _ => EVMC_SUCCESS
+requires:
andBool TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR <=Int maxSInt256
andBool DECIMAL_RESULT ==Int TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR /Int VYPER_DEC_MULTIPLIER
andBool DECIMAL_RESULT <=Int maxDecimal
andBool RESULT ==Int DECIMAL_RESULT /Int VYPER_DEC_MULTIPLIER
ensures:
ensures #range(0 <= RESULT <= maxSInt128)
[total_curdyn_deposits_scaled-failure-1]
statusCode: _ => EVMC_BAD_JUMP_DESTINATION
+requires:
andBool TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR <=Int maxSInt256
andBool DECIMAL_RESULT ==Int TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR /Int VYPER_DEC_MULTIPLIER
andBool DECIMAL_RESULT >Int maxDecimal
[total_curdyn_deposits_scaled-failure-21]
statusCode: _ => EVMC_REVERT
+requires:
andBool TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR >Int maxSInt256
//does not work because chop() is not evaluated further when it has symbolic arguments
/*andBool #range(0 <= (TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR) modInt pow256 <= maxSInt256)*/
andBool #range(0 <= chop(TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR) <= maxSInt256)
[total_curdyn_deposits_scaled-failure-22]
statusCode: _ => EVMC_REVERT
+requires:
andBool TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR >Int maxSInt256
andBool #range(maxSInt256 < chop(TOTAL_CURDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR) <= maxUInt256)
;def total_prevdyn_deposits_scaled() -> wei_value:
; return floor(self.total_prevdyn_deposits * self.deposit_scale_factor[self.current_epoch])
[total_prevdyn_deposits_scaled]
comment:
k: (#execute => #halt) ~> _
output: _ => _
callStack: _
callData: #abiCallData("total_prevdyn_deposits_scaled", .TypedArgs)
callValue: 0
wordStack: .WordStack => _
localMem: .Map => _
pc: 0 => _
gas: 100000 => _
memoryUsed: 0 => _
callDepth: CD
log: _
refund: _
coinbase: _
activeAccounts: _
casperBalance: _
storage:
// self.total_prevdyn_deposits : decimal
(#hashedLocation({COMPILER}, {TOTAL_PREVDYN_DEPOSITS}, .IntList) |-> TOTAL_PREVDYN_DEPOSITS)
// self.current_epoch : int128
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> CURRENT_EPOCH)
//self.deposit_scale_factor[self.current_epoch] : decimal
(#hashedLocation({COMPILER}, {DEPOSIT_SCALE_FACTOR}, CURRENT_EPOCH) |-> CUR_EPOCH_SCALE_FACTOR)
_:Map
accounts:
requires:
andBool #rangeSFixed(128, 10, TOTAL_PREVDYN_DEPOSITS)
andBool #rangeSInt(128, CURRENT_EPOCH)
andBool #rangeSFixed(128, 10, CUR_EPOCH_SCALE_FACTOR)
andBool #range(0 <= CD < 1024)
andBool TOTAL_PREVDYN_DEPOSITS >=Int 0
andBool CURRENT_EPOCH >=Int 0
andBool CUR_EPOCH_SCALE_FACTOR >Int 0
attribute:
ensures:
[total_prevdyn_deposits_scaled-success]
output: _ => #asByteStackInWidth(RESULT, 32)
statusCode: _ => EVMC_SUCCESS
+requires:
andBool TOTAL_PREVDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR <=Int maxSInt256
andBool DECIMAL_RESULT ==Int TOTAL_PREVDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR /Int VYPER_DEC_MULTIPLIER
andBool DECIMAL_RESULT <=Int maxDecimal
andBool RESULT ==Int DECIMAL_RESULT /Int VYPER_DEC_MULTIPLIER
ensures:
ensures #range(0 <= RESULT <= maxSInt128)
[total_prevdyn_deposits_scaled-failure-1]
statusCode: _ => EVMC_BAD_JUMP_DESTINATION
+requires:
andBool TOTAL_PREVDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR <=Int maxSInt256
andBool DECIMAL_RESULT ==Int TOTAL_PREVDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR /Int VYPER_DEC_MULTIPLIER
andBool DECIMAL_RESULT >Int maxDecimal
[total_prevdyn_deposits_scaled-failure-21]
statusCode: _ => EVMC_REVERT
+requires:
andBool TOTAL_PREVDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR >Int maxSInt256
andBool #range(0 <= chop(TOTAL_PREVDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR) <= maxSInt256)
[total_prevdyn_deposits_scaled-failure-22]
statusCode: _ => EVMC_REVERT
+requires:
andBool TOTAL_PREVDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR >Int maxSInt256
andBool #range(maxSInt256 < chop(TOTAL_PREVDYN_DEPOSITS *Int CUR_EPOCH_SCALE_FACTOR) <= maxUInt256)
;def deposit_size(validator_index: int128) -> int128(wei):
; return floor(self.validators[validator_index].deposit * self.deposit_scale_factor[self.current_epoch])
[deposit_size]
comment:
k: (#execute => #halt) ~> _
output: _ => _
callStack: _
callData: #abiCallData("deposit_size", #int128(VALIDATOR_INDEX))
callValue: 0
wordStack: .WordStack => _
localMem: .Map => _
pc: 0 => _
gas: 100000 => _
memoryUsed: 0 => _
callDepth: CD
log: _
refund: _
coinbase: _
activeAccounts: _
casperBalance: _
storage:
// self.validators[validator_index].deposit : decimal
(#hashedLocation({COMPILER}, {VALIDATORS}, VALIDATOR_INDEX {DEPOSIT}) |-> VALIDATOR_DEPOSIT)
// self.current_epoch : int128
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> CURRENT_EPOCH)
//self.deposit_scale_factor[self.current_epoch] : decimal
(#hashedLocation({COMPILER}, {DEPOSIT_SCALE_FACTOR}, CURRENT_EPOCH) |-> CUR_EPOCH_SCALE_FACTOR)
_:Map
accounts:
requires:
andBool #rangeSInt(128, VALIDATOR_INDEX)
andBool #rangeSFixed(128, 10, VALIDATOR_DEPOSIT)
andBool #rangeSInt(128, CURRENT_EPOCH)
andBool #rangeSFixed(128, 10, CUR_EPOCH_SCALE_FACTOR)
andBool #range(0 <= CD < 1024)
andBool VALIDATOR_INDEX >=Int 0
andBool VALIDATOR_DEPOSIT >=Int 0
andBool CURRENT_EPOCH >=Int 0
andBool CUR_EPOCH_SCALE_FACTOR >Int 0
attribute:
ensures:
[deposit_size-success]
output: _ => #asByteStackInWidth(RESULT, 32)
statusCode: _ => EVMC_SUCCESS
+requires:
andBool VALIDATOR_DEPOSIT *Int CUR_EPOCH_SCALE_FACTOR <=Int maxSInt256
andBool DECIMAL_RESULT ==Int VALIDATOR_DEPOSIT *Int CUR_EPOCH_SCALE_FACTOR /Int VYPER_DEC_MULTIPLIER
andBool DECIMAL_RESULT <=Int maxDecimal
andBool RESULT ==Int DECIMAL_RESULT /Int VYPER_DEC_MULTIPLIER
ensures:
ensures #range(0 <= RESULT <= maxSInt128)
[deposit_size-failure-1]
statusCode: _ => EVMC_BAD_JUMP_DESTINATION
+requires:
andBool VALIDATOR_DEPOSIT *Int CUR_EPOCH_SCALE_FACTOR <=Int maxSInt256
andBool DECIMAL_RESULT ==Int VALIDATOR_DEPOSIT *Int CUR_EPOCH_SCALE_FACTOR /Int VYPER_DEC_MULTIPLIER
andBool DECIMAL_RESULT >Int maxDecimal
[deposit_size-failure-21]
statusCode: _ => EVMC_REVERT
+requires:
andBool VALIDATOR_DEPOSIT *Int CUR_EPOCH_SCALE_FACTOR >Int maxSInt256
andBool #range(0 <= chop(VALIDATOR_DEPOSIT *Int CUR_EPOCH_SCALE_FACTOR) <= maxSInt256)
[deposit_size-failure-22]
statusCode: _ => EVMC_REVERT
+requires:
andBool VALIDATOR_DEPOSIT *Int CUR_EPOCH_SCALE_FACTOR >Int maxSInt256
andBool #range(maxSInt256 < chop(VALIDATOR_DEPOSIT *Int CUR_EPOCH_SCALE_FACTOR) <= maxUInt256)
[esf]
callData: #abiCallData("esf", .TypedArgs)
callValue: 0
[esf-success]
output: _ => #asByteStackInWidth(CURRENT_EPOCH -Int LAST_FINALIZED_EPOCH, 32)
statusCode: _ => EVMC_SUCCESS
storage:
// self.current_epoch : int128
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> CURRENT_EPOCH)
// self.last_finalized_epoch : int128
(#hashedLocation({COMPILER}, {LAST_FINALIZED_EPOCH}, .IntList) |-> LAST_FINALIZED_EPOCH)
_:Map
+requires:
// Range
andBool #rangeSInt(128, CURRENT_EPOCH)
andBool #rangeSInt(128, LAST_FINALIZED_EPOCH)
// Invariant
andBool CURRENT_EPOCH >=Int 0
andBool LAST_FINALIZED_EPOCH >=Int 0
andBool CURRENT_EPOCH -Int LAST_FINALIZED_EPOCH >=Int 0
//
andBool CALLER_ID ==Int CASPER_ACCT_ID
[esf-failure]
output: _ => _
statusCode: _ => EVMC_INVALID
storage:
_:Map
+requires:
andBool CALLER_ID =/=Int CASPER_ACCT_ID
[collective_reward]
callData: #abiCallData("collective_reward", .TypedArgs)
callValue: 0
[collective_reward-success]
statusCode: _ => EVMC_SUCCESS
storage:
// epoch:int128 = self.current_epoch
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> EPOCH)
// self.last_finalized_epoch : int128
(#hashedLocation({COMPILER}, {LAST_FINALIZED_EPOCH}, .IntList) |-> LAST_FINALIZED_EPOCH)
// self.expected_source_epoch : int128
(#hashedLocation({COMPILER}, {EXPECTED_SOURCE_EPOCH}, .IntList) |-> EXPECTED_SOURCE_EPOCH)
+requires:
andBool CALLER_ID ==Int CASPER_ACCT_ID
andBool #rangeSInt(128, EPOCH)
andBool #rangeSInt(128, LAST_FINALIZED_EPOCH)
andBool #rangeSInt(128, EXPECTED_SOURCE_EPOCH)
andBool EPOCH >=Int 1
andBool LAST_FINALIZED_EPOCH >=Int 1
andBool EXPECTED_SOURCE_EPOCH >=Int 0
// live: bool = self.esf() <= 2
andBool ESF ==Int EPOCH -Int LAST_FINALIZED_EPOCH
andBool ESF >=Int 0
[collective_reward-success-normal]
+storage:
// self.total_curdyn_deposits : decimal
(#hashedLocation({COMPILER}, {TOTAL_CURDYN_DEPOSITS}, .IntList) |-> TOTAL_CURDYN_DEPOSITS)
// self.total_prevdyn_deposits : decimal
(#hashedLocation({COMPILER}, {TOTAL_PREVDYN_DEPOSITS}, .IntList) |-> TOTAL_PREVDYN_DEPOSITS)
// self.votes[epoch - 1].cur_dyn_votes[self.expected_source_epoch] : decimal
(#hashedLocation({COMPILER}, {VOTES}, (EPOCH -Int 1) {CUR_DYN_VOTES} EXPECTED_SOURCE_EPOCH) |-> CUR_DYN_VOTES)
// self.votes[epoch - 1].prev_dyn_votes[self.expected_source_epoch] : decimal
(#hashedLocation({COMPILER}, {VOTES}, (EPOCH -Int 1) {PREV_DYN_VOTES} EXPECTED_SOURCE_EPOCH) |-> PREV_DYN_VOTES)
// self.reward_factor : decimal
(#hashedLocation({COMPILER}, {REWARD_FACTOR}, .IntList) |-> REWARD_FACTOR)
_:Map
+requires:
andBool #rangeSFixed(128, 10, TOTAL_CURDYN_DEPOSITS)
andBool #rangeSFixed(128, 10, TOTAL_PREVDYN_DEPOSITS)
andBool #rangeSFixed(128, 10, CUR_DYN_VOTES)
andBool #rangeSFixed(128, 10, PREV_DYN_VOTES)
andBool #rangeSFixed(128, 10, REWARD_FACTOR)
andBool TOTAL_CURDYN_DEPOSITS >=Int 0
andBool TOTAL_PREVDYN_DEPOSITS >=Int 0
andBool CUR_DYN_VOTES >=Int 0
andBool PREV_DYN_VOTES >=Int 0
andBool REWARD_FACTOR >=Int 0
// there is no overflow because of these
andBool CUR_DYN_VOTES <=Int TOTAL_CURDYN_DEPOSITS
andBool PREV_DYN_VOTES <=Int TOTAL_PREVDYN_DEPOSITS
// deposit_exists() -> no division by zero
andBool TOTAL_CURDYN_DEPOSITS >Int 0
andBool TOTAL_PREVDYN_DEPOSITS >Int 0
// live
andBool ESF <=Int 2
// cur_vote_frac: decimal = self.votes[epoch - 1].cur_dyn_votes[self.expected_source_epoch] / self.total_curdyn_deposits
andBool CUR_VOTE_FRAC ==Int CUR_DYN_VOTES *Int VYPER_DEC_MULTIPLIER /Int TOTAL_CURDYN_DEPOSITS
// prev_vote_frac: decimal = self.votes[epoch - 1].prev_dyn_votes[self.expected_source_epoch] / self.total_prevdyn_deposits
andBool PREV_VOTE_FRAC ==Int PREV_DYN_VOTES *Int VYPER_DEC_MULTIPLIER /Int TOTAL_PREVDYN_DEPOSITS
[collective_reward-success-normal-1]
output: _ => #asByteStackInWidth(CUR_VOTE_FRAC *Int REWARD_FACTOR /Int VYPER_DEC_MULTIPLIER /Int 2, 32)
+requires:
// vote_frac: decimal = min(cur_vote_frac, prev_vote_frac)
andBool CUR_VOTE_FRAC <=Int PREV_VOTE_FRAC
[collective_reward-success-normal-2]
output: _ => #asByteStackInWidth(PREV_VOTE_FRAC *Int REWARD_FACTOR /Int VYPER_DEC_MULTIPLIER /Int 2, 32)
+requires:
// vote_frac: decimal = min(cur_vote_frac, prev_vote_frac)
andBool CUR_VOTE_FRAC >Int PREV_VOTE_FRAC
; `return 0.0` cases
[collective_reward-success-zero]
statusCode: _ => EVMC_SUCCESS
output: _ => #asByteStackInWidth(0, 32)
[collective_reward-success-zero-1]
+requires:
andBool (TOTAL_PREVDYN_DEPOSITS ==Int 0
orBool TOTAL_CURDYN_DEPOSITS ==Int 0)
[collective_reward-success-zero-1-1]
+requires:
// looks redundant but fails without it:
// symbolic term remains inside `#asByteStack(bool2Word(...))`
andBool ESF <=Int 2
[collective_reward-success-zero-1-2]
+requires:
andBool ESF >Int 2
[collective_reward-success-zero-2]
+requires:
andBool TOTAL_PREVDYN_DEPOSITS >Int 0
andBool TOTAL_CURDYN_DEPOSITS >Int 0
andBool ESF >Int 2
[collective_reward-failure]
output: _ => _
statusCode: _ => EVMC_REVERT
storage: _:Map
+requires:
andBool CALLER_ID =/=Int CASPER_ACCT_ID
[insta_finalize]
callData: #abiCallData("insta_finalize", .TypedArgs)
callValue: 0
[insta_finalize-success]
output: _ => .WordStack
statusCode: _ => EVMC_SUCCESS
log: _:List ( .List
=> ListItem(#abiEventLog(CASPER_ACCT_ID, "Epoch", #indexed(#int128(EPOCH -Int 1)), #indexed(#bytes32(EPOCH_HASH)), #bool(1), #bool(1)))
)
storage:
// epoch = self.current_epoch : int128
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> EPOCH)
// self.main_hash_justified
(#hashedLocation({COMPILER}, {MAIN_HASH_JUSTIFIED}, .IntList) |-> (_ => 1))
// assert self.votes[epoch - 1].is_justified
(#hashedLocation({COMPILER}, {VOTES}, (EPOCH -Int 1) {IS_JUSTIFIED}) |-> (_ => 1))
// assert self.votes[epoch - 1].is_finalized
(#hashedLocation({COMPILER}, {VOTES}, (EPOCH -Int 1) {IS_FINALIZED}) |-> (_ => 1))
// self.last_justified_epoch : int128
(#hashedLocation({COMPILER}, {LAST_JUSTIFIED_EPOCH}, .IntList) |-> (_ => EPOCH -Int 1))
// self.last_finalized_epoch : int128
(#hashedLocation({COMPILER}, {LAST_FINALIZED_EPOCH}, .IntList) |-> (_ => EPOCH -Int 1))
// self.checkpoint_hashes[epoch - 1]
(#hashedLocation({COMPILER}, {CHECKPOINT_HASHES}, EPOCH -Int 1) |-> EPOCH_HASH)
_:Map
+requires:
// Range
andBool #rangeSInt(128, EPOCH)
andBool #rangeUInt(256, EPOCH_HASH)
// Invariant
andBool EPOCH >Int 1
//
andBool CALLER_ID ==Int CASPER_ACCT_ID
[insta_finalize-failure]
output: _ => _
statusCode: _ => EVMC_INVALID
storage:
_:Map
+requires:
andBool CALLER_ID =/=Int CASPER_ACCT_ID
[proc_reward]
comment:
k: (#execute => #halt) ~> _
output: _ => .WordStack
statusCode: _ => EVMC_SUCCESS
callStack: _
callData: #abiCallData("proc_reward", #int128(VINDEX), #int128(REWARD))
callValue: 0
wordStack: .WordStack => _
localMem: .Map => _
pc: 0 => _
gas: GCAP => NEW_GCAP
memoryUsed: 0 => _
callDepth: CD
log: _
refund: _ => _
coinbase: COINBASE_ACCT_ID
activeAccounts: SetItem(CASPER_ACCT_ID) SetItem(COINBASE_ACCT_ID) _:Set
casperBalance: CASPER_BAL => CASPER_BAL -Int ((REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000)
storage:
// self.validators[validator_index].deposit
(#hashedLocation({COMPILER}, {VALIDATORS}, VINDEX {DEPOSIT}) |-> (DEPOSIT => DEPOSIT +Int REWARD *Int 10000000000))
// self.validators[validator_index].end_dynasty
(#hashedLocation({COMPILER}, {VALIDATORS}, VINDEX {END_DYNASTY}) |-> END_DYN)
// self.validators[validator_index].start_dynasty
(#hashedLocation({COMPILER}, {VALIDATORS}, VINDEX {START_DYNASTY}) |-> START_DYN)
// self.dynasty
(#hashedLocation({COMPILER}, {DYNASTY}, .IntList) |-> CURRENT_DYN)
// self.dynasty_wei_delta[end_dynasty]
(#hashedLocation({COMPILER}, {DYNASTY_WEI_DELTA}, END_DYN) |-> (#unsigned(DYN_WEI_DELTA) => #unsigned(NEW_DYN_WEI_DELTA)))
// self.total_curdyn_deposits
(#hashedLocation({COMPILER}, {TOTAL_CURDYN_DEPOSITS}, .IntList) |-> (TOTAL_CURDYN_DEPOSITS => NEW_TOTAL_CURDYN_DEPOSITS))
// self.total_prevdyn_deposits
(#hashedLocation({COMPILER}, {TOTAL_PREVDYN_DEPOSITS}, .IntList) |-> (TOTAL_PREVDYN_DEPOSITS => NEW_TOTAL_PREVDYN_DEPOSITS))
// self.deposit_scale_factor[self.current_epoch]
(#hashedLocation({COMPILER}, {DEPOSIT_SCALE_FACTOR}, CURRENT_EPOCH) |-> CUR_EPOCH_SCALE_FACTOR)
// self.current_epoch
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> CURRENT_EPOCH)
// self.default_end_dynasty
(#hashedLocation({COMPILER}, {DEFAULT_END_DYNASTY}, .IntList) |-> DEFAULT_END_DYN)
_:Map
accounts:
<account>
<acctID> COINBASE_ACCT_ID </acctID>
<balance> COINBASE_BAL => COINBASE_BAL +Int ((REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000) </balance>
<code> .WordStack </code>
<storage> _ </storage>
<origStorage> _ </origStorage>
<nonce> COINBASE_NOUNCE </nonce>
</account>
requires:
andBool #rangeSInt(128, VINDEX)
andBool #rangeSInt(128, REWARD)
andBool #rangeAddress(COINBASE_ACCT_ID)
andBool #rangeUInt(256, CASPER_BAL)
andBool #rangeSFixed(128, 10, DEPOSIT)
andBool #rangeSInt(128, END_DYN)
andBool #rangeSInt(128, START_DYN)
andBool #rangeSInt(128, CURRENT_DYN)
andBool #rangeSFixed(128, 10, DYN_WEI_DELTA)
andBool #rangeSFixed(128, 10, TOTAL_CURDYN_DEPOSITS)
andBool #rangeSFixed(128, 10, TOTAL_PREVDYN_DEPOSITS)
andBool #rangeSFixed(128, 10, CUR_EPOCH_SCALE_FACTOR)
andBool #rangeSInt(128, CURRENT_EPOCH)
andBool #rangeSInt(128, DEFAULT_END_DYN)
andBool #rangeUInt(256, COINBASE_BAL)
andBool #rangeUInt(256, COINBASE_NOUNCE)
// Invariant
andBool VINDEX >Int 0
andBool REWARD >=Int 0
andBool COINBASE_ACCT_ID >Int 0 andBool (notBool COINBASE_ACCT_ID in #precompiledAccounts(BYZANTIUM))
andBool DEPOSIT >=Int 0
andBool END_DYN >=Int 0
andBool START_DYN >=Int 0
//FIXME can be proved for CURRENT_DYN >= 0 as well, not clear if needed.
andBool CURRENT_DYN -Int 1 >=Int 0
andBool TOTAL_CURDYN_DEPOSITS >=Int 0
andBool TOTAL_PREVDYN_DEPOSITS >=Int 0
andBool CUR_EPOCH_SCALE_FACTOR >Int 0
andBool CURRENT_EPOCH >=Int 0
andBool DEFAULT_END_DYN >=Int 0
andBool COINBASE_NOUNCE >Int 0
// Overflow check
andBool (DEPOSIT +Int REWARD *Int 10000000000) <=Int maxSFixed128x10
andBool minSFixed128x10 <=Int NEW_DYN_WEI_DELTA
andBool NEW_TOTAL_CURDYN_DEPOSITS <=Int maxSFixed128x10
andBool NEW_TOTAL_PREVDYN_DEPOSITS <=Int maxSFixed128x10
andBool REWARD *Int CUR_EPOCH_SCALE_FACTOR <=Int maxSFixed128x10
andBool 0 <=Int CASPER_BAL -Int ((REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000)
andBool COINBASE_BAL +Int ((REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000) <=Int maxUInt256
//assignments
andBool NEW_TOTAL_CURDYN_DEPOSITS:Int ==K #if IN_CURRENT_DYN
#then TOTAL_CURDYN_DEPOSITS +Int REWARD *Int 10000000000
#else TOTAL_CURDYN_DEPOSITS
#fi
andBool NEW_TOTAL_PREVDYN_DEPOSITS:Int ==K #if IN_PREV_DYN
#then TOTAL_PREVDYN_DEPOSITS +Int REWARD *Int 10000000000
#else TOTAL_PREVDYN_DEPOSITS
#fi
andBool NEW_DYN_WEI_DELTA ==K #if NEED_SUBSTRACT_REWARD
#then DYN_WEI_DELTA -Int REWARD *Int 10000000000
#else DYN_WEI_DELTA
#fi
// Path condition
andBool CALLER_ID ==Int CASPER_ACCT_ID
andBool IN_CURRENT_DYN:Bool ==K #inCurDynasty(START_DYN, END_DYN, CURRENT_DYN)
andBool IN_PREV_DYN:Bool ==K #inPrevDynasty(START_DYN, END_DYN, CURRENT_DYN)
andBool NEED_SUBSTRACT_REWARD:Bool ==K END_DYN <Int DEFAULT_END_DYN
andBool 0 <Int (REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000
andBool CASPER_ACCT_ID =/=Int COINBASE_ACCT_ID
// Call Depth
andBool #range(0 <= CD < 1024)
// Gas
andBool GCAP >=Int (92207 +Int 2300) // Gcallstipend
ensures: ensures NEW_GCAP >=Int GCAP -Int 92207
attribute:
[vote]
comment:
k: (#execute => #halt) ~> _
output: _ => .WordStack
statusCode: _ => EVMC_REVERT /*will be rewritten later*/
callStack: _
callData: #abiCallData("vote", #int128(VALIDATOR_INDEX), #bytes32(TARGET_HASH), #int128(TARGET_EPOCH), #int128(SOURCE_EPOCH))
;callData: #abiCallData("vote", #toBytes(RLP(#int128(VALIDATOR_INDEX), #bytes32(TARGET_HASH), #int128(TARGET_EPOCH), #int128(SOURCE_EPOCH), #bytes(1024, SIG)), 1024))
callValue: 0
wordStack: .WordStack => _
localMem: .Map => _
pc: 0 => _
;gas cost 274618
gas: 10000000 => _
memoryUsed: 0 => _
callDepth: 0
log: _
refund: _ => _
coinbase: COINBASE_ACCT_ID
activeAccounts: SetItem(CASPER_ACCT_ID) SetItem(COINBASE_ACCT_ID) _:Set
casperBalance: CASPER_BAL => NEW_CASPER_BAL
storage:
//used by recommended_target_hash()
// self.current_epoch
(#hashedLocation({COMPILER}, {CURRENT_EPOCH}, .IntList) |-> CURRENT_EPOCH)
// self.EPOCH_LENGTH : int128
(#hashedLocation({COMPILER}, {EPOCH_LENGTH}, .IntList) |-> EPOCH_LENGTH)
// start_dynasty: int128 = self.validators[validator_index].start_dynasty
(#hashedLocation({COMPILER}, {VALIDATORS}, VALIDATOR_INDEX {START_DYNASTY}) |-> START_DYN)
// end_dynasty: int128 = self.validators[validator_index].end_dynasty
(#hashedLocation({COMPILER}, {VALIDATORS}, VALIDATOR_INDEX {END_DYNASTY}) |-> END_DYN)
// current_dynasty: int128 = self.dynasty
(#hashedLocation({COMPILER}, {DYNASTY}, .IntList) |-> CURRENT_DYN)
// self.votes[target_epoch].vote_bitmap[floor(validator_index / 256)]
(#hashedLocation({COMPILER}, {VOTES}, TARGET_EPOCH {VOTE_BITMAP} V_ID_BITKEY) |-> (V_ID_BITWORD => NEW_V_ID_BITWORD))
// self.votes[source_epoch].is_justified
(#hashedLocation({COMPILER}, {VOTES}, SOURCE_EPOCH {IS_JUSTIFIED}) |-> SOURCE_IS_JUSTIFIED)
// self.checkpoint_hashes[source_epoch]
(#hashedLocation({COMPILER}, {CHECKPOINT_HASHES}, SOURCE_EPOCH) |-> SOURCE_EPOCH_HASH)
// self.checkpoint_hashes[target_epoch]
(#hashedLocation({COMPILER}, {CHECKPOINT_HASHES}, TARGET_EPOCH) |-> TARGET_EPOCH_HASH)
accounts:
<account>
<acctID> COINBASE_ACCT_ID </acctID>
<balance> COINBASE_BAL => NEW_COINBASE_BAL </balance>
<code> .WordStack </code>
<storage> _ </storage>
<origStorage> _ </origStorage>
<nonce> COINBASE_NOUNCE </nonce>
</account>
requires:
// Type constraint
andBool #rangeAddress(COINBASE_ACCT_ID)
andBool (notBool COINBASE_ACCT_ID in #precompiledAccounts(BYZANTIUM))
andBool #rangeSInt(128, VALIDATOR_INDEX)
andBool 0 <Int VALIDATOR_INDEX // start validator index counter at 1
andBool #rangeUInt(256, TARGET_HASH)
andBool #rangeSInt(128, TARGET_EPOCH)
andBool 0 <=Int TARGET_EPOCH
andBool #rangeSInt(128, SOURCE_EPOCH)
andBool 0 <=Int SOURCE_EPOCH
andBool #rangeSInt(128, CURRENT_EPOCH)
andBool 0 <Int CURRENT_EPOCH
andBool #rangeSInt(128, EPOCH_LENGTH)
andBool 0 <Int EPOCH_LENGTH
andBool #rangeSInt(128, START_DYN)
andBool 0 <=Int START_DYN
andBool #rangeSInt(128, END_DYN)
andBool 0 <=Int END_DYN
andBool #rangeSInt(128, CURRENT_DYN)
//FIXME can be proved for CURRENT_DYN >= 0 as well, not clear if needed.
andBool 0 <=Int CURRENT_DYN -Int 1
andBool #rangeUInt(256, V_ID_BITWORD)
andBool #rangeUInt(256, COINBASE_BAL)
andBool #rangeUInt(256, CASPER_BAL)
andBool #rangeUInt(256, SOURCE_EPOCH_HASH)
andBool #rangeUInt(256, TARGET_EPOCH_HASH)
andBool V_ID_BITKEY ==Int VALIDATOR_INDEX /Int 256
andBool PAST_DYN ==Int CURRENT_DYN -Int 1
andBool IN_CURRENT_DYN:Bool ==K ((START_DYN <=Int CURRENT_DYN) andBool (CURRENT_DYN <Int END_DYN))
andBool IN_PREV_DYN:Bool ==K ((START_DYN <=Int PAST_DYN) andBool (PAST_DYN <Int END_DYN))
ensures:
attribute:
[vote-1-2-3-4-5-6]
+storage:
// self.validators[validator_index].deposit
//(#hashedLocation({COMPILER}, {VALIDATORS}, VALIDATOR_INDEX {DEPOSIT}) |-> (DEPOSIT => DEPOSIT +Int REWARD *Int 10000000000))
(#hashedLocation({COMPILER}, {VALIDATORS}, VALIDATOR_INDEX {DEPOSIT}) |-> (DEPOSIT => NEW_DEPOSIT))
// self.votes[target_epoch].cur_dyn_votes[source_epoch]
(#hashedLocation({COMPILER}, {VOTES}, TARGET_EPOCH {CUR_DYN_VOTES} SOURCE_EPOCH) |-> (CUR_DYN_VOTES => NEW_CUR_DYN_VOTES))
// self.votes[target_epoch].prev_dyn_votes[source_epoch]
(#hashedLocation({COMPILER}, {VOTES}, TARGET_EPOCH {PREV_DYN_VOTES} SOURCE_EPOCH) |-> (PREV_DYN_VOTES => NEW_PREV_DYN_VOTES))
+requires:
andBool #rangeSFixed(128, 10, DEPOSIT)
andBool 0 <=Int DEPOSIT
andBool #rangeSFixed(128, 10, CUR_DYN_VOTES)
andBool 0 <=Int CUR_DYN_VOTES
andBool #rangeSFixed(128, 10, PREV_DYN_VOTES)
andBool 0 <=Int PREV_DYN_VOTES
//overflow of computed values
andBool NEW_CUR_DYN_VOTES <=Int maxDecimal
andBool NEW_PREV_DYN_VOTES <=Int maxDecimal
//FIXME more concrete cases
andBool (IN_CURRENT_DYN orBool IN_PREV_DYN)
//assignments
andBool NEW_V_ID_BITWORD ==Int #setVoteBit(V_ID_BITWORD, VALIDATOR_INDEX)
andBool NEW_CUR_DYN_VOTES:Int ==K #if IN_CURRENT_DYN #then CUR_DYN_VOTES +Int DEPOSIT #else CUR_DYN_VOTES #fi
andBool NEW_PREV_DYN_VOTES:Int ==K #if IN_PREV_DYN #then PREV_DYN_VOTES +Int DEPOSIT #else PREV_DYN_VOTES #fi
andBool NEW_TOTAL_CURDYN_DEPOSITS:Int ==K #if IN_CURRENT_DYN
#then TOTAL_CURDYN_DEPOSITS +Int REWARD *Int 10000000000
#else TOTAL_CURDYN_DEPOSITS
#fi
andBool NEW_TOTAL_PREVDYN_DEPOSITS:Int ==K #if IN_PREV_DYN
#then TOTAL_PREVDYN_DEPOSITS +Int REWARD *Int 10000000000
#else TOTAL_PREVDYN_DEPOSITS
#fi
andBool NEW_DYN_WEI_DELTA ==K #if NEED_SUBSTRACT_REWARD
#then DYN_WEI_DELTA -Int REWARD *Int 10000000000
#else DYN_WEI_DELTA
#fi
; Specs for the 3 cases generated by first 2 if statements.
; Combining all 3 paths in one spec: works after fixing lemmas for proc_reward.
[vote-1-2-3-4-5-6-success]
output: _ => .WordStack
statusCode: _ => EVMC_SUCCESS
log: _:List ( .List
=> ListItem(#abiEventLog(CASPER_ACCT_ID, "Epoch", #indexed(#int128(TARGET_EPOCH)), #indexed(#bytes32(TARGET_EPOCH_HASH)), #bool(1), #bool(0)))
ListItem(#abiEventLog(CASPER_ACCT_ID, "Epoch", #indexed(#int128(SOURCE_EPOCH)), #indexed(#bytes32(SOURCE_EPOCH_HASH)), #bool(1), #bool(1)))
ListItem(#abiEventLog(CASPER_ACCT_ID, "Vote", #indexed(#address(WITHDRAWAL_ADDR)), #indexed(#int128(VALIDATOR_INDEX)), #indexed(#bytes32(TARGET_HASH)), #int128(TARGET_EPOCH), #int128(SOURCE_EPOCH)))
)
+storage:
// self.validators[validator_index].withdrawal_addr
(#hashedLocation({COMPILER}, {VALIDATORS}, VALIDATOR_INDEX {WITHDRAWAL_ADDR}) |-> WITHDRAWAL_ADDR)
// self.dynasty_wei_delta[end_dynasty]
(#hashedLocation({COMPILER}, {DYNASTY_WEI_DELTA}, END_DYN) |-> (#unsigned(DYN_WEI_DELTA) => #unsigned(NEW_DYN_WEI_DELTA)))
// self.total_curdyn_deposits
(#hashedLocation({COMPILER}, {TOTAL_CURDYN_DEPOSITS}, .IntList) |-> (TOTAL_CURDYN_DEPOSITS => NEW_TOTAL_CURDYN_DEPOSITS))
// self.total_prevdyn_deposits
(#hashedLocation({COMPILER}, {TOTAL_PREVDYN_DEPOSITS}, .IntList) |-> (TOTAL_PREVDYN_DEPOSITS => NEW_TOTAL_PREVDYN_DEPOSITS))
// self.votes[source_epoch].is_finalized
(#hashedLocation({COMPILER}, {VOTES}, SOURCE_EPOCH {IS_FINALIZED}) |-> (_ => 1))
// self.votes[target_epoch].is_justified
(#hashedLocation({COMPILER}, {VOTES}, TARGET_EPOCH {IS_JUSTIFIED}) |-> (0 => 1))
// self.main_hash_justified
(#hashedLocation({COMPILER}, {MAIN_HASH_JUSTIFIED}, .IntList) |-> (_ => 1))
// self.deposit_scale_factor[self.current_epoch]
(#hashedLocation({COMPILER}, {DEPOSIT_SCALE_FACTOR}, CURRENT_EPOCH) |-> CUR_EPOCH_SCALE_FACTOR)
// self.last_finalized_epoch
(#hashedLocation({COMPILER}, {LAST_FINALIZED_EPOCH}, .IntList) |-> (_ => SOURCE_EPOCH))
// self.last_justified_epoch
(#hashedLocation({COMPILER}, {LAST_JUSTIFIED_EPOCH}, .IntList) |-> (_ => TARGET_EPOCH))
// self.reward_factor
(#hashedLocation({COMPILER}, {REWARD_FACTOR}, .IntList) |-> REWARD_FACTOR)
// self.expected_source_epoch
(#hashedLocation({COMPILER}, {EXPECTED_SOURCE_EPOCH}, .IntList) |-> EXPECTED_SOURCE_EPOCH)
// self.DEFAULT_END_DYNASTY
(#hashedLocation({COMPILER}, {DEFAULT_END_DYNASTY}, .IntList) |-> DEFAULT_END_DYN)
_:Map
+requires:
andBool #rangeAddress(WITHDRAWAL_ADDR)
andBool #rangeSFixed(128, 10, DYN_WEI_DELTA)
andBool #rangeSFixed(128, 10, TOTAL_CURDYN_DEPOSITS)
andBool 0 <=Int TOTAL_CURDYN_DEPOSITS
andBool #rangeSFixed(128, 10, TOTAL_PREVDYN_DEPOSITS)
andBool 0 <=Int TOTAL_PREVDYN_DEPOSITS
andBool #rangeSFixed(128, 10, CUR_EPOCH_SCALE_FACTOR)
andBool 0 <Int CUR_EPOCH_SCALE_FACTOR
andBool #rangeSFixed(128, 10, REWARD_FACTOR)
andBool 0 <Int REWARD_FACTOR // assert self.reward_factor > 0 in `initialize_epoch()`
andBool #rangeSInt(128, EXPECTED_SOURCE_EPOCH)
andBool 0 <=Int EXPECTED_SOURCE_EPOCH
andBool #rangeSInt(128, DEFAULT_END_DYN)
andBool 0 <=Int DEFAULT_END_DYN
andBool COINBASE_NOUNCE ==Int 1
// Overflow check
andBool (DEPOSIT *Int REWARD_FACTOR) <=Int maxDecimal *Int 10000000000
andBool ((TOTAL_CURDYN_DEPOSITS +Int REWARD *Int 10000000000) *Int 2) <=Int maxDecimal
andBool ((TOTAL_PREVDYN_DEPOSITS +Int REWARD *Int 10000000000) *Int 2) <=Int maxDecimal
andBool (SOURCE_EPOCH +Int 1) <=Int maxSInt128
andBool (DEPOSIT +Int REWARD *Int 10000000000) <=Int maxDecimal
andBool minDecimal <=Int (DYN_WEI_DELTA -Int REWARD *Int 10000000000)
//FIXME depending on conditions
andBool TOTAL_CURDYN_DEPOSITS +Int REWARD *Int 10000000000 <=Int maxDecimal
andBool TOTAL_PREVDYN_DEPOSITS +Int REWARD *Int 10000000000 <=Int maxDecimal
andBool REWARD *Int CUR_EPOCH_SCALE_FACTOR <=Int maxDecimal
andBool 0 <=Int CASPER_BAL -Int ((REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000)
andBool COINBASE_BAL +Int ((REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000) <=Int maxUInt256
// Path constraint
// recommended_target_hash overflow checks
andBool (CURRENT_EPOCH *Int EPOCH_LENGTH) <=Int maxSInt128
andBool #range(BLOCK_NUM -Int 256 <= #expectedBlockNumber(CURRENT_EPOCH, EPOCH_LENGTH) < BLOCK_NUM)
// if self.expected_source_epoch == source_epoch
andBool SOURCE_EPOCH ==Int EXPECTED_SOURCE_EPOCH
// proc_reward
andBool REWARD ==Int ((DEPOSIT *Int REWARD_FACTOR) /Int 10000000000) /Int 10000000000
andBool NEED_SUBSTRACT_REWARD:Bool ==K END_DYN <Int DEFAULT_END_DYN
//FIXME remove when working. Removing entry below doesn't finish in 4 hours.
andBool NEED_SUBSTRACT_REWARD
andBool 0 <Int (REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000
andBool CASPER_ACCT_ID =/=Int COINBASE_ACCT_ID
// if (current_dynasty_votes >= self.total_curdyn_deposits * 2 / 3 and previous_dynasty_votes >= self.total_prevdyn_deposits * 2 / 3)
andBool #isJustified(NEW_CUR_DYN_VOTES, TOTAL_CURDYN_DEPOSITS +Int REWARD *Int 10000000000, NEW_PREV_DYN_VOTES, TOTAL_PREVDYN_DEPOSITS +Int REWARD *Int 10000000000)
// if target_epoch == source_epoch + 1
andBool TARGET_EPOCH ==Int SOURCE_EPOCH +Int 1
//assignments
andBool NEW_COINBASE_BAL ==Int COINBASE_BAL +Int ((REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000)
andBool NEW_CASPER_BAL ==Int CASPER_BAL -Int ((REWARD *Int CUR_EPOCH_SCALE_FACTOR /Int 8) /Int 10000000000)
[vote-1-2-3-4-5-6-success-1]
+requires:
// WARN: Forced case analysis to overcome K limitations.
andBool 0 <Int VALIDATOR_INDEX modInt 256
; FIXME does not work for general case, when IN_CURRENT_DYN and IN_PREV_DYN are not specified. Wrapping up Casper project.
;[vote-1-2-3-4-5-6-success-2]
;+requires:
; //WARN: Forced case analysis to overcome K limitations.
; andBool 0 ==Int (VALIDATOR_INDEX modInt 256)
; //WARN: Redundant requirement. Consequence of the above and #notVoteBefore(...), required due to K limitations.
; andBool (V_ID_BITWORD &Int 1) ==Int 0 //e.g. not voted before
; assert not bitwise_and(self.votes[target_epoch].vote_bitmap[floor(validator_index / 256)],
; shift(convert(1, 'uint256'), validator_index % 256))
[vote-1-failure-1]
+requires:
//failure: assert not bitwise_and(...)
andBool notBool #notVoteBefore(V_ID_BITWORD, VALIDATOR_INDEX)