diff --git a/alembic/versions/db62e7db828d_.py b/alembic/versions/db62e7db828d_initial_schema.py
similarity index 59%
rename from alembic/versions/db62e7db828d_.py
rename to alembic/versions/db62e7db828d_initial_schema.py
index 7c9e871..d97c56d 100644
--- a/alembic/versions/db62e7db828d_.py
+++ b/alembic/versions/db62e7db828d_initial_schema.py
@@ -1,9 +1,9 @@
-"""empty message
+"""
+initial schema
 
 Revision ID: db62e7db828d
 Revises: 
 Create Date: 2023-09-28 23:04:41.020644
-
 """
 from typing import Sequence, Union
 
@@ -46,6 +46,25 @@ def upgrade() -> None:
     sa.Column('key', sa.String(), nullable=False),
     sa.PrimaryKeyConstraint('chain', 'series', 'key')
     )
+    op.create_table('transactionjob',
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('chain', dexorder.database.column_types.Blockchain(), nullable=False),
+    sa.Column('height', sa.Integer(), nullable=False),
+    sa.Column('completed', sa.Boolean(), nullable=False),
+    sa.Column('request', dexorder.database.column_types._DataclassDict(astext_type=sa.Text()), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_transactionjob_chain'), 'transactionjob', ['chain'], unique=False)
+    op.create_index(op.f('ix_transactionjob_completed'), 'transactionjob', ['completed'], unique=False)
+    op.create_index(op.f('ix_transactionjob_height'), 'transactionjob', ['height'], unique=False)
+    op.create_table('tx',
+    sa.Column('id', sa.UUID(), nullable=False),
+    sa.Column('tx', postgresql.JSONB(astext_type=sa.Text()), nullable=False),
+    sa.Column('hash', postgresql.BYTEA(), nullable=False),
+    sa.Column('receipt', postgresql.JSONB(astext_type=sa.Text()), nullable=False),
+    sa.ForeignKeyConstraint(['id'], ['transactionjob.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
 
 
 def downgrade() -> None:
@@ -53,3 +72,5 @@ def downgrade() -> None:
     op.drop_table('seriesdict')
     op.drop_table('keyvalue')
     op.drop_table('block')
+    op.drop_table('tx')
+    op.drop_table('transactionjob')
diff --git a/bin/df.sh b/bin/df.sh
index d0bca27..528f701 100755
--- a/bin/df.sh
+++ b/bin/df.sh
@@ -1,2 +1,2 @@
 #!/bin/bash
-docker run --network=host --ulimit memlock=-1 docker.dragonflydb.io/dragonflydb/dragonfly --maxmemory 1G --dbfilename '' "$@"
+docker run --network=host --ulimit memlock=-1 docker.dragonflydb.io/dragonflydb/dragonfly:latest --maxmemory 1G --dbfilename '' "$@"
diff --git a/src/dexorder/base/account.py b/src/dexorder/base/account.py
index c25c37b..82ade0a 100644
--- a/src/dexorder/base/account.py
+++ b/src/dexorder/base/account.py
@@ -66,4 +66,4 @@ class Account (LocalAccount):
         return self.name
 
 
-current_account: ContextVar[Account] = ContextVar('current_account')
+current_account: ContextVar[Optional[Account]] = ContextVar('current_account', default=Account.get())
diff --git a/src/dexorder/base/order.py b/src/dexorder/base/order.py
new file mode 100644
index 0000000..9b85a92
--- /dev/null
+++ b/src/dexorder/base/order.py
@@ -0,0 +1,65 @@
+import logging
+from dataclasses import dataclass
+from typing import Optional, Type, Union
+
+log = logging.getLogger(__name__)
+
+@dataclass(frozen=True, eq=True)
+class OrderKey:
+    vault: str
+    order_index: int
+
+    @staticmethod
+    def str2key(keystring: str):
+        vault, order_index = keystring.split('|')
+        return OrderKey(vault, int(order_index))
+
+    def __str__(self):
+        return f'{self.vault}|{self.order_index}'
+
+
+@dataclass(frozen=True, eq=True)
+class TrancheKey (OrderKey):
+    tranche_index: int
+
+    @staticmethod
+    def str2key(keystring: str):
+        vault, order_index, tranche_index = keystring.split('|')
+        return TrancheKey(vault, int(order_index), int(tranche_index))
+
+    def __str__(self):
+        return f'{self.vault}|{self.order_index}|{self.tranche_index}'
+
+
+@dataclass
+class ExecutionRequest:
+    height: int
+    proof: None
+
+
+@dataclass
+class TransactionRequest:
+    type: str # 'te' for tranche execution
+
+@dataclass
+class TrancheExecutionRequest (TransactionRequest):
+    # type: str # 'te' for tranche execution
+    vault: str
+    order_index: int
+    tranche_index: int
+    price_proof: Union[None,dict,tuple[int]]
+
+def new_tranche_execution_request(tk: TrancheKey, _proof: Optional[dict]) -> TrancheExecutionRequest:
+    return TrancheExecutionRequest('te', tk.vault, tk.order_index, tk.tranche_index, (0,)) # todo proof
+
+def deserialize_transaction_request(**d):
+    t = d['type']
+    Class = transaction_request_registry.get(t)
+    if Class is None:
+        raise ValueError(f'No TransactionRequest for type "{t}"')
+    # noinspection PyArgumentList
+    return Class(**d)
+
+transaction_request_registry: dict[str, Type[TransactionRequest]] = dict(
+    te = TrancheExecutionRequest,
+)
diff --git a/src/dexorder/blockchain/connection.py b/src/dexorder/blockchain/connection.py
index 2f84f58..f41336f 100644
--- a/src/dexorder/blockchain/connection.py
+++ b/src/dexorder/blockchain/connection.py
@@ -1,7 +1,7 @@
 from hexbytes import HexBytes
 from web3 import WebsocketProviderV2, AsyncWeb3, AsyncHTTPProvider
 
-from dexorder.util.uniswap_util import get_contract_data
+from ..contract import get_contract_data
 from .. import current_w3
 from ..configuration import resolve_rpc_url
 from ..configuration.resolve import resolve_ws_url
diff --git a/src/dexorder/blockchain/transaction.py b/src/dexorder/blockchain/transaction.py
new file mode 100644
index 0000000..8041a11
--- /dev/null
+++ b/src/dexorder/blockchain/transaction.py
@@ -0,0 +1,76 @@
+import logging
+from abc import abstractmethod
+from uuid import uuid4
+
+from dexorder import db, current_w3
+from dexorder.base.chain import current_chain
+from dexorder.base.order import TransactionRequest
+from dexorder.database.model.block import current_block
+from dexorder.database.model.transaction import TransactionJob, Transaction as DbTransaction
+
+log = logging.getLogger(__name__)
+
+
+class TransactionHandler:
+    instances: dict[str,'TransactionHandler'] = {}
+
+    @staticmethod
+    def of(tag: str):
+        return TransactionHandler.instances[tag]
+
+    def __init__(self, tag):
+        TransactionHandler.instances[tag] = self
+
+    @abstractmethod
+    async def send_transaction(self, job_id: int, tr: TransactionRequest) -> dict: ...
+
+    @abstractmethod
+    async def complete_transaction(self, job: TransactionJob) -> None: ...
+
+
+def submit_transaction(tr: TransactionRequest):
+    job = TransactionJob(id=uuid4(), chain=current_chain.get(), height=current_block.get().height, completed=False, request=tr)
+    db.session.add(job)
+    return job
+
+async def handle_transactions():
+    for job in db.session.query(TransactionJob).filter(
+            TransactionJob.chain == current_chain.get(),
+            TransactionJob.completed == False
+    ):
+        if not job.tx:
+            await create_transaction(job)
+        if job.tx and not job.tx.receipt:
+            await check_receipt(job)
+
+
+async def create_transaction(job: TransactionJob):
+    try:
+        handler = TransactionHandler.of(job.request.type)
+    except KeyError:
+        # todo remove bad request?
+        log.warning(f'ignoring transaction request with bad type "{job.request.type}"')
+    else:
+        tx = await handler.send_transaction(job.id, job.request)
+        job.tx = dtx = DbTransaction(tx=tx, hash=tx['hash'], receipt=None)
+        db.session.add(dtx)
+        log.info(f'servicing transaction request {job.request.__class__.__name__} {job.id} with tx {tx}')
+
+
+async def check_receipt(job: TransactionJob):
+    if not job.tx:
+        return
+    w3 = current_w3.get()
+    receipt = await w3.eth.get_transaction_receipt(job.tx.hash)
+    if receipt is not None:
+        job.tx.receipt = receipt
+        job.completed = True
+        db.session.add(job.tx)
+        try:
+            handler = TransactionHandler.of(job.request.type)
+        except KeyError:
+            # todo remove bad request?
+            log.warning(f'ignoring transaction request with bad type "{job.request.type}"')
+        else:
+            await handler.complete_transaction(job)
+
diff --git a/src/dexorder/blockchain/uniswap.py b/src/dexorder/blockchain/uniswap.py
index 55f266e..83c24a5 100644
--- a/src/dexorder/blockchain/uniswap.py
+++ b/src/dexorder/blockchain/uniswap.py
@@ -31,7 +31,7 @@ def uniswap_pool_address(factory_addr: str, addr_a: str, addr_b: str, fee: int)
         + UNISWAPV3_POOL_INIT_CODE_HASH
     ).hex()[-40:]
     result = to_checksum_address(contract_address)
-    log.debug(f'uniswap pool address {factory_addr} {addr_a} {addr_b} {fee} => {result}')
+    # log.debug(f'uniswap pool address {factory_addr} {addr_a} {addr_b} {fee} => {result}')
     return result
 
 def uniswap_price(sqrt_price):
diff --git a/src/dexorder/contract/__init__.py b/src/dexorder/contract/__init__.py
index ccaacc2..41b1e1a 100644
--- a/src/dexorder/contract/__init__.py
+++ b/src/dexorder/contract/__init__.py
@@ -1,6 +1,10 @@
+import json
+
 from eth_abi.codec import ABIDecoder, ABIEncoder
 from eth_abi.registry import registry as default_registry
 
+from .. import current_w3
+
 abi_decoder = ABIDecoder(default_registry)
 abi_encoder = ABIEncoder(default_registry)
 
@@ -10,5 +14,11 @@ from .pool_contract import UniswapV3Pool
 from .uniswap_contracts import uniswapV3
 
 
-def VaultContract(addr):
-    return ContractProxy(addr, 'Vault')
+def get_contract_data(name):
+    with open(f'../contract/out/{name}.sol/{name}.json', 'rt') as file:
+        return json.load(file)
+
+
+def get_contract_event(contract_name:str, event_name:str):
+    return getattr(current_w3.get().eth.contract(abi=get_contract_data(contract_name)['abi']).events, event_name)()
+
diff --git a/src/dexorder/contract/contract_proxy.py b/src/dexorder/contract/contract_proxy.py
index cd389b3..78fcea6 100644
--- a/src/dexorder/contract/contract_proxy.py
+++ b/src/dexorder/contract/contract_proxy.py
@@ -15,13 +15,13 @@ class Transaction:
         self.account = account
         self.id_bytes = tx_id_bytes
         self._id = None
-        self._receipt: Optional[TxReceipt] = None
+        self.receipt: Optional[TxReceipt] = None
 
-    def wait(self) -> TxReceipt:
-        if self._receipt is None:
-            self._receipt = current_w3.get().eth.wait_for_transaction_receipt(self.id_bytes)
+    async def wait(self) -> TxReceipt:
+        if self.receipt is None:
+            self.receipt = await current_w3.get().eth.wait_for_transaction_receipt(self.id_bytes)
             self.account.transaction_counter += 1
-        return self._receipt
+        return self.receipt
 
     @property
     def id(self) -> str:
@@ -29,35 +29,24 @@ class Transaction:
             self._id = self.id_bytes.hex()
         return self._id
 
-    @property
-    def receipt(self) -> TxReceipt:
-        if self._receipt is None:
-            try:
-                self._receipt = current_w3.get().eth.get_transaction_receipt(self.id_bytes)
-                self.account.transaction_counter += 1
-            except TransactionNotFound:
-                pass
-        return self._receipt
-
     def __repr__(self):
-        self.receipt()
-        receipt_status = 'IN_FLIGHT' if self._receipt is None else 'REVERTED' if self._receipt.status == 0 else self._receipt.blockNumber
+        receipt_status = 'IN_FLIGHT' if self.receipt is None else 'REVERTED' if self.receipt.status == 0 else self.receipt.blockNumber
         return f'Transaction({self.id},{receipt_status})'
 
 
 def call_wrapper(func):
-    def f(*args, **kwargs):
-        return func(*args, **kwargs).call(block_identifier=hexstr(current_block.get().hash))
+    async def f(*args, **kwargs):
+        return await func(*args, **kwargs).call(block_identifier=hexstr(current_block.get().hash))
     return f
 
 
 def transact_wrapper(func):
-    def f(*args, **kwargs):
+    async def f(*args, **kwargs):
         try:
             account = current_account.get()
         except LookupError:
             raise RuntimeError('Cannot invoke a transaction without setting an Account.')
-        return Transaction(account, func(*args, **kwargs).transact())
+        return Transaction(account, await func(*args, **kwargs).transact())
 
     return f
 
@@ -91,6 +80,10 @@ class ContractProxy:
             self._contracts[w3] = found
         return found
 
+    @property
+    def events(self):
+        return self.contract.events
+
     def deploy(self, *args):
         """
         Calls the contract constructor transaction and waits to receive a transaction receipt.
diff --git a/src/dexorder/contract/dexorder.py b/src/dexorder/contract/dexorder.py
new file mode 100644
index 0000000..43acd6a
--- /dev/null
+++ b/src/dexorder/contract/dexorder.py
@@ -0,0 +1,78 @@
+import json
+import logging
+
+from eth_abi.packed import encode_packed
+from eth_utils import keccak, to_bytes, to_checksum_address
+
+from dexorder import config
+from dexorder.base.chain import current_chain
+from dexorder.contract import ContractProxy
+from dexorder.util import hexstr
+
+log = logging.getLogger(__name__)
+
+_factory = {}
+_dexorder = {}
+
+
+def _load_chain(chain_id: int):
+    deployment_tag = config.deployments.get(str(chain_id), 'latest')
+    try:
+        with open(f'../contract/broadcast/Deploy.sol/{chain_id}/run-{deployment_tag}.json', 'rt') as file:
+            deployment = json.load(file)
+            for tx in deployment['transactions']:
+                if tx['contractName'] == 'Factory':
+                    addr = tx['contractAddress']
+                    _factory[chain_id] = ContractProxy(addr, 'Factory')
+                    log.info(f'Factory {addr}')
+                elif tx['contractName'] == 'Dexorder':
+                    addr = tx['contractAddress']
+                    _dexorder[chain_id] = DexorderContract(addr)
+                    log.info(f'Dexorder {addr}')
+    except FileNotFoundError:
+        log.warning(f'Could not find deployment for chain {chain_id} "{deployment_tag}"')
+
+
+def get_by_chain(d):
+    chain_id = current_chain.get().chain_id
+    try:
+        return d[chain_id]
+    except KeyError:
+        _load_chain(chain_id)
+    return d[chain_id]
+
+def get_factory_contract() -> ContractProxy:
+    return get_by_chain(_factory)
+
+def get_dexorder_contract() -> ContractProxy:
+    return get_by_chain(_dexorder)
+
+
+VAULT_INIT_CODE_HASH = None
+
+
+def vault_address(owner, num):
+    global VAULT_INIT_CODE_HASH
+    if VAULT_INIT_CODE_HASH is None:
+        with open('../contract/out/Vault.sol/Vault.json', 'rt') as _file:
+            vault_info = json.load(_file)
+        VAULT_INIT_CODE_HASH = keccak(to_bytes(hexstr=vault_info['bytecode']['object']))
+        log.info(f'VAULT_INIT_CODE_HASH {hexstr(VAULT_INIT_CODE_HASH)}')
+    salt = keccak(encode_packed(['address','uint8'],[owner,num]))
+    contract_address = keccak(
+        b"\xff"
+        + to_bytes(hexstr=get_factory_contract().address)
+        + salt
+        + VAULT_INIT_CODE_HASH
+    ).hex()[-40:]
+    addr = to_checksum_address(contract_address)
+    # log.debug(f'vault addr {owner} #{num} => {salt.hex()} {VAULT_INIT_CODE_HASH.hex()} = {addr}')
+    return addr
+
+
+def VaultContract(addr):
+    return ContractProxy(addr, 'Vault')
+
+
+def DexorderContract(addr):
+    return ContractProxy(addr, 'Dexorder')
diff --git a/src/dexorder/data/__init__.py b/src/dexorder/data/__init__.py
index 6569b88..78d501f 100644
--- a/src/dexorder/data/__init__.py
+++ b/src/dexorder/data/__init__.py
@@ -1,10 +1,12 @@
 from dexorder import dec
 from dexorder.blockstate import BlockSet, BlockDict
+from dexorder.util import defaultdictk, hexstr
 
 # pub=... publishes to a channel for web clients to consume. argument is (key,value) and return must be (event,room,args)
 #     if pub is True, then event is the current series name, room is the key, and args is [value]
 #     values of DELETE are serialized as nulls
 
 vault_owners: BlockDict[str,str] = BlockDict('v', db=True, redis=True)
-vault_tokens: BlockDict[str,str] = BlockDict('vt', db=True, redis=True, pub=True)
+vault_tokens: dict[str, BlockSet[str]] = defaultdictk(lambda vault: BlockSet(f'vt|{vault}', db=True, redis=True, pub=lambda k,v: ('vt', vault_owners[vault], [k])))
 pool_prices: BlockDict[str,dec] = BlockDict('p', db=True, redis=True, pub=True, value2str=lambda d:f'{d:f}', str2value=dec)
+underfunded_vaults: BlockDict[str, list[str]] = BlockDict('uv', db=True, redis=True, value2str=lambda v:','.join(v), str2value=lambda s: s.split(','))
diff --git a/src/dexorder/database/column.py b/src/dexorder/database/column.py
index c803b83..98e46c1 100644
--- a/src/dexorder/database/column.py
+++ b/src/dexorder/database/column.py
@@ -1,6 +1,8 @@
+import uuid
 from typing import Union
+from uuid import uuid4
 
-from hexbytes import HexBytes
+import sqlalchemy as sa
 from sqlalchemy import SMALLINT, INTEGER, BIGINT
 from sqlalchemy.dialects.postgresql import BYTEA, JSONB
 from sqlalchemy.orm import mapped_column
@@ -9,6 +11,9 @@ from typing_extensions import Annotated
 from dexorder import Fixed2, Blockchain as NativeBlockchain
 from . import column_types as t
 
+UUID = Annotated[uuid.UUID, mapped_column(sa.UUID(as_uuid=True))]
+UUID_PK = Annotated[uuid.UUID, mapped_column(sa.UUID(as_uuid=True), primary_key=True, default=uuid4)]
+
 # noinspection DuplicatedCode
 Uint8 = Annotated[int, mapped_column(SMALLINT)]
 Uint16 = Annotated[int, mapped_column(SMALLINT)]
@@ -87,6 +92,8 @@ Blockchain = Annotated[NativeBlockchain, mapped_column(t.Blockchain)]
 
 Json = Annotated[Union[str,int,float,list,dict,None], mapped_column(JSONB)]
 
+Dict = Annotated[dict, mapped_column(JSONB)]
+
 # Uniswap aliases
 Tick = Int24
 SqrtPriceX96 = Uint160
diff --git a/src/dexorder/database/column_types.py b/src/dexorder/database/column_types.py
index c3fdbb4..9d96657 100644
--- a/src/dexorder/database/column_types.py
+++ b/src/dexorder/database/column_types.py
@@ -1,7 +1,8 @@
+import dataclasses
 import math
 
 from sqlalchemy import TypeDecorator, BIGINT
-from sqlalchemy.dialects.postgresql import BYTEA
+from sqlalchemy.dialects.postgresql import BYTEA, JSONB
 from web3 import Web3
 
 from dexorder import Fixed2 as NativeFixed, Blockchain as NativeBlockchain
@@ -26,7 +27,7 @@ class Blockchain(TypeDecorator):
         return value.chain_id
 
     def process_result_value(self, value: int, dialect):
-        return Blockchain.for_id(value)
+        return NativeBlockchain.for_id(value)
 
 
 
@@ -69,3 +70,18 @@ def Fixed(bits, dbits, signed=False):
     result.dbits = dbits
     result.signed = signed
     return result
+
+
+class _DataclassDict(TypeDecorator):
+    impl = JSONB
+
+    def process_bind_param(self, value, dialect):
+        return dataclasses.asdict(value)
+
+    def process_result_value(self, value, dialect):
+        return self.Constructor(**value)
+
+def DataclassDict(constructor):
+    result = _DataclassDict()
+    result.Constructor = constructor
+    return result
diff --git a/src/dexorder/database/model/__init__.py b/src/dexorder/database/model/__init__.py
index d8a6b48..e75a79f 100644
--- a/src/dexorder/database/model/__init__.py
+++ b/src/dexorder/database/model/__init__.py
@@ -1,3 +1,4 @@
 from .base import Base
 from .block import Block
 from .series import SeriesSet, SeriesDict
+from .transaction import Transaction, TransactionJob
diff --git a/src/dexorder/database/model/transaction.py b/src/dexorder/database/model/transaction.py
new file mode 100644
index 0000000..3aed731
--- /dev/null
+++ b/src/dexorder/database/model/transaction.py
@@ -0,0 +1,29 @@
+import logging
+
+from sqlalchemy import ForeignKey, UniqueConstraint
+from sqlalchemy.orm import mapped_column, Mapped, relationship
+
+from dexorder.base.order import TransactionRequest as TransactionRequestDict, deserialize_transaction_request
+from dexorder.database.column import Dict, Bytes, UUID_PK, Blockchain, UUID
+from dexorder.database.column_types import DataclassDict
+from dexorder.database.model import Base
+
+log = logging.getLogger(__name__)
+
+
+class TransactionJob (Base):
+    id: Mapped[UUID_PK]
+    chain: Mapped[Blockchain] = mapped_column(index=True)
+    height: Mapped[int] = mapped_column(index=True) # to be used for data rolloff and/or by Timescale
+    completed: Mapped[bool] = mapped_column(default=False, index=True)
+    request: Mapped[TransactionRequestDict] = mapped_column(DataclassDict(deserialize_transaction_request))
+    tx: Mapped["Transaction"] = relationship(back_populates="job", uselist=False)
+
+class Transaction (Base):
+    __tablename__ = 'tx' # avoid the keyword "transaction"
+
+    id: Mapped[UUID] = mapped_column(ForeignKey("transactionjob.id"), primary_key=True)
+    job: Mapped[TransactionJob] = relationship(back_populates="tx", single_parent=True)
+    tx: Mapped[Dict]
+    hash: Mapped[Bytes]
+    receipt: Mapped[Dict]
diff --git a/src/dexorder/event_handler.py b/src/dexorder/event_handler.py
index aae6527..df36e57 100644
--- a/src/dexorder/event_handler.py
+++ b/src/dexorder/event_handler.py
@@ -1,21 +1,28 @@
 import logging
+from uuid import UUID
 
 from web3.types import EventData
 
-from dexorder import current_pub, current_w3
+from dexorder import current_pub, db
 from dexorder.base.chain import current_chain
+from dexorder.base.order import TrancheExecutionRequest, TrancheKey, ExecutionRequest, new_tranche_execution_request
+from dexorder.blockchain.transaction import handle_transactions, submit_transaction
 from dexorder.blockchain.uniswap import uniswap_price
-from dexorder.util.uniswap_util import vault_address, get_contract_event, get_factory, get_contract_data
-from dexorder.contract import VaultContract, UniswapV3Pool
-from dexorder.data import pool_prices, vault_owners, vault_tokens
+from dexorder.contract.dexorder import get_factory_contract, vault_address, VaultContract, get_dexorder_contract
+from dexorder.contract import UniswapV3Pool, get_contract_event
+from dexorder.data import pool_prices, vault_owners, vault_tokens, underfunded_vaults
 from dexorder.database.model.block import current_block
-
+from dexorder.database.model.transaction import TransactionJob
 from dexorder.order.orderlib import SwapOrderState, SwapOrderStatus
-from dexorder.order.orderstate import Order
-from dexorder.order.triggers import OrderTriggers, close_order_and_disable_triggers, price_triggers, time_triggers
+from dexorder.order.orderstate import Order, active_orders
+from dexorder.order.triggers import OrderTriggers, close_order_and_disable_triggers, price_triggers, time_triggers, \
+    unconstrained_price_triggers, execution_requests, inflight_execution_requests
+from dexorder.util import hexbytes
 
 log = logging.getLogger(__name__)
 
+LOG_ALL_EVENTS = False  # for debug
+
 
 async def ensure_pool_price(pool_addr):
     if pool_addr not in pool_prices:
@@ -32,24 +39,36 @@ def setup_logevent_triggers(runner):
     # code ordering here is also the trigger order: e.g. we process all vault creation events
     # before any order creations
 
-    # DEBUG
-    runner.add_event_trigger(dump_log, None, {})
+    if LOG_ALL_EVENTS:
+        runner.add_event_trigger(dump_log, None, {})
 
-    factory = get_factory()
+    factory = get_factory_contract()
     if factory is None:
         log.warning(f'No Factory for {current_chain.get()}')
         vault_created = get_contract_event('Factory', 'VaultCreated')
     else:
-        vault_created = current_w3.get().eth.contract(factory.address, abi=get_contract_data('Factory')['abi']).events.VaultCreated()
+        vault_created = factory.events.VaultCreated()
+
+    dexorder = get_dexorder_contract()
+    if dexorder is None:
+        log.warning(f'No Dexorder for {current_chain.get()}')
+        executions = get_contract_event('Dexorder', 'DexorderExecutions')
+    else:
+        executions = dexorder.events.DexorderExecutions()
+
+
     runner.add_event_trigger(handle_vault_created, vault_created)
     runner.add_event_trigger(handle_order_placed, get_contract_event('OrderLib', 'DexorderSwapPlaced'))
-    runner.add_event_trigger(activate_time_triggers)
     runner.add_event_trigger(handle_transfer, get_contract_event('ERC20', 'Transfer'))
     runner.add_event_trigger(handle_uniswap_swap, get_contract_event('IUniswapV3PoolEvents', 'Swap'))
     runner.add_event_trigger(handle_swap_filled, get_contract_event('OrderLib', 'DexorderSwapFilled'))
     runner.add_event_trigger(handle_order_completed, get_contract_event('OrderLib', 'DexorderSwapCompleted'))
     runner.add_event_trigger(handle_order_error, get_contract_event('OrderLib', 'DexorderSwapError'))
+    runner.add_event_trigger(handle_dexorderexecutions, executions)
+    runner.add_event_trigger(activate_time_triggers)
     runner.add_event_trigger(activate_price_triggers)
+    runner.add_event_trigger(process_execution_requests)
+    runner.add_event_trigger(handle_transactions)
 
 
 async def handle_order_placed(event: EventData):
@@ -89,13 +108,17 @@ def handle_order_error(event: EventData):
     log.debug(f'DexorderError {event}')
 
 def handle_transfer(transfer: EventData):
+    from_address = transfer['args']['from']
     to_address = transfer['args']['to']
     log.debug(f'transfer {to_address}')
     if to_address in vault_owners:
         token_address = transfer['address']
-        vault_tokens.add(token_address)
+        vault_tokens[to_address].add(token_address)
     if to_address in underfunded_vaults:
-        # todo flag underfunded vault (check token type?)
+        # todo possibly funded now
+        pass
+    if from_address in active_orders:
+        # todo possibly underfunded now
         pass
 
 
@@ -113,7 +136,6 @@ def handle_uniswap_swap(swap: EventData):
 
 
 def handle_vault_created(created: EventData):
-    log.debug(f'VaultCreated {created}')
     try:
         owner = created['args']['owner']
         num = created['args']['num']
@@ -135,18 +157,68 @@ def handle_vault_created(created: EventData):
     current_pub.get()(f'{current_chain.get().chain_id}|{owner}', 'vaults', vaults)
 
 
+def handle_dexorderexecutions(event: EventData):
+    log.debug(f'executions {event}')
+    exe_id = UUID(hexbytes(event['args']['id']))
+    errors = event['args']['errors']
+    job = db.session.get(TransactionJob, exe_id)
+    req: TrancheExecutionRequest = job.request
+    tk = TrancheKey( req.vault, req.order_index, req.tranche_index )
+    order = active_orders[tk]
+    if job is None:
+        log.warning(f'Job {exe_id} not found!')
+        return
+    if len(errors) == 0:
+        log.warning(f'No errors found in DexorderExecutions event: {event}')
+        return
+    if len(errors) > 1:
+        log.warning(f'Multiple executions not yet implemented')
+    error = errors[0]
+    log.debug(f'job {exe_id} had error "{error}"')
+    if error == '':
+        pass  # execution success
+    elif error == 'IIA':
+        # insufficient input amount: suspend execution until new funds are sent
+        token = order.order.tokenIn
+        underfunded_vaults[req.vault] = underfunded_vaults.get(req.vault, []) + [token]
+        log.debug(f'insufficient funds {req.vault} {token} ')
+    else:
+        log.error(f'Unhandled execution error for transaction request {req} ERROR: "{error}"')
+
+
 def activate_time_triggers():
     now = current_block.get().timestamp
+    log.debug(f'activating time triggers')
     # time triggers
     for tt in time_triggers:
         tt(now)
 
 def activate_price_triggers():
+    log.debug('activating price triggers')
     for pool, price in new_pool_prices.items():
         for pt in price_triggers[pool]:
             pt(price)
+    new_pool_prices.clear()
+    for t in unconstrained_price_triggers:
+        # noinspection PyTypeChecker
+        t(None)
 
-def execute_requests():
-    log.info('execute requests: todo')
-    pass # todo
+async def process_execution_requests():
+    height = current_block.get().height
+    execs = []  # which requests to act on
+    for tk, er in execution_requests.items():
+        tk: TrancheKey
+        er: ExecutionRequest
+        pending = inflight_execution_requests.get(tk)
+        if pending is None or pending > height or height-pending >= 30: # todo execution timeout => retry ; should we use timestamps? configure per-chain.
+            execs.append((tk,er))
+        else:
+            log.debug(f'tranche {tk} is pending execution')
 
+    # execute the list
+    # todo batch execution
+    for tk, er in execs:
+        log.info(f'executing tranche {tk}')
+        job = submit_transaction(new_tranche_execution_request(tk, er.proof))
+        inflight_execution_requests[tk] = height
+        log.info(f'executing tranche {tk} with job {job.id}')
diff --git a/src/dexorder/order/executionhandler.py b/src/dexorder/order/executionhandler.py
new file mode 100644
index 0000000..f5efff4
--- /dev/null
+++ b/src/dexorder/order/executionhandler.py
@@ -0,0 +1,21 @@
+import logging
+
+from dexorder.base.order import TrancheExecutionRequest
+from dexorder.blockchain.transaction import TransactionHandler
+from dexorder.contract.dexorder import get_dexorder_contract
+from dexorder.database.model.transaction import TransactionJob
+
+log = logging.getLogger(__name__)
+
+class TrancheExecutionHandler (TransactionHandler):
+    def __init__(self):
+        super().__init__('te')
+
+    async def send_transaction(self, job_id: int, ter: TrancheExecutionRequest) -> dict:
+        return await get_dexorder_contract().transact.execute(job_id, (ter.vault, ter.order_index, ter.tranche_index, ter.price_proof))
+
+    async def complete_transaction(self, job: TransactionJob) -> None:
+        # anything to do?
+        pass
+
+TrancheExecutionHandler() # map 'te' to a TrancheExecutionHandler
diff --git a/src/dexorder/order/orderstate.py b/src/dexorder/order/orderstate.py
index a68ebf2..a8348e2 100644
--- a/src/dexorder/order/orderstate.py
+++ b/src/dexorder/order/orderstate.py
@@ -2,36 +2,12 @@ import logging
 from dataclasses import dataclass
 from typing import overload
 
+from dexorder.base.order import OrderKey, TrancheKey
 from dexorder.blockstate import BlockDict, BlockSet
 from dexorder.order.orderlib import SwapOrderStatus, SwapOrderState
 
 log = logging.getLogger(__name__)
 
-@dataclass(frozen=True, eq=True)
-class OrderKey:
-    vault: str
-    order_index: int
-
-    @staticmethod
-    def str2key(keystring: str):
-        vault, order_index = keystring.split('|')
-        return OrderKey(vault, int(order_index))
-
-    def __str__(self):
-        return f'{self.vault}|{self.order_index}'
-
-@dataclass(frozen=True, eq=True)
-class TrancheKey (OrderKey):
-    tranche_index: int
-
-    @staticmethod
-    def str2key(keystring: str):
-        vault, order_index, tranche_index = keystring.split('|')
-        return TrancheKey(vault, int(order_index), int(tranche_index))
-
-    def __str__(self):
-        return f'{self.vault}|{self.order_index}|{self.tranche_index}'
-
 
 @dataclass
 class Filled:
@@ -66,7 +42,7 @@ class Order:
 
     @staticmethod
     def of(a, b=None):
-        return Order.instances[a if b is None else OrderKey(a,b)]
+        return Order.instances[a if b is None else OrderKey(a, b)]
 
 
     @staticmethod
@@ -76,7 +52,7 @@ class Order:
         Order._statuses[key] = status.copy() # always copy the struct when setting. values in BlockData must be immutable
         order = Order(key)
         if order.is_open:
-            Order._open_keys.add(key)
+            Order.open_keys.add(key)
             Order._order_filled[key] = Filled(status.filledIn, status.filledOut)
             for i, tk in enumerate(order.tranche_keys):
                 Order._tranche_filled[tk] = Filled(status.trancheFilledIn[i], status.trancheFilledOut[i])
@@ -90,7 +66,7 @@ class Order:
 
     def __init__(self, a, b=None):
         """ references an existing Order in the system. to create a new order, use create() """
-        key = a if b is None else OrderKey(a,b)
+        key = a if b is None else OrderKey(a, b)
         assert key not in Order.instances
         self.key = key
         self.status: SwapOrderStatus = Order._statuses[key].copy()
@@ -157,7 +133,7 @@ class Order:
         status = self.status
         status.state = final_state
         if self.is_open:
-            Order._open_keys.remove(self.key)
+            Order.open_keys.remove(self.key)
             # set final fill values in the status
             filled = Order._order_filled[self.key]
             try:
@@ -178,19 +154,17 @@ class Order:
         Order._statuses[self.key] = final_status # set the status in order to save it
         Order._statuses.unload(self.key) # but then unload from memory after root promotion
 
+
     # ORDER STATE
     # various blockstate fields hold different aspects of an order's state.
 
+    # open orders = the set of unfilled, not-canceled orders
+    open_keys: BlockSet[OrderKey] = BlockSet('oo', db=True, redis=True, str2key=OrderKey.str2key)
+
     # this series holds "everything" about an order in the canonical format specified by the contract orderlib, except
     # the filled amount fields for active orders are maintained in the order_remainings and tranche_remainings series.
     _statuses: BlockDict[OrderKey, SwapOrderStatus] = BlockDict('o', db='lazy', str2key=OrderKey.str2key)
 
-    # open orders = the set of unfilled, not-canceled orders
-    _open_keys: BlockSet[OrderKey] = BlockSet('oo', db=True, redis=True, str2key=OrderKey.str2key)
-
-    # underfunded vaults
-    _underfunded: BlockSet[str] = BlockSet('uv', db=True, redis=True)
-
     # total remaining amount per order, for all unfilled, not-canceled orders
     _order_filled: BlockDict[OrderKey, Filled] = BlockDict(
         'of', db=True, redis=True, str2key=OrderKey.str2key, value2str=Filled.remaining2str, str2value=Filled.str2remaining)
diff --git a/src/dexorder/order/triggers.py b/src/dexorder/order/triggers.py
index 29830f0..e9e7735 100644
--- a/src/dexorder/order/triggers.py
+++ b/src/dexorder/order/triggers.py
@@ -1,11 +1,13 @@
 import logging
 from enum import Enum
-from typing import Callable
+from typing import Callable, Optional
 
 from dexorder.blockstate import BlockSet, BlockDict
-from .orderlib import TimeConstraint, LimitConstraint, ConstraintMode, SwapOrderState
+from .orderlib import TimeConstraint, LimitConstraint, ConstraintMode, SwapOrderState, PriceProof
 from dexorder.util import defaultdictk
-from .orderstate import TrancheKey, Order, OrderKey
+from .orderstate import Order
+from ..base.order import OrderKey, TrancheKey, new_tranche_execution_request, ExecutionRequest
+from ..blockchain.transaction import submit_transaction
 from ..database.model.block import current_block
 
 log = logging.getLogger(__name__)
@@ -16,8 +18,9 @@ time_triggers:BlockSet[TimeTrigger] = BlockSet('tt')
 
 PriceTrigger = Callable[[int], None]  # func(pool_price)
 price_triggers:dict[str, BlockSet[PriceTrigger]] = defaultdictk(lambda addr:BlockSet(f'pt|{addr}')) # different BlockSet per pool address
-
-execution_requests:BlockDict[TrancheKey,int] = BlockDict('te') # value is block height of the request
+unconstrained_price_triggers: BlockSet[PriceTrigger] = BlockSet('upt')  # tranches with no price constraints, whose time constraint is fulfilled
+execution_requests:BlockDict[TrancheKey, ExecutionRequest] = BlockDict('e') # value is block height when the request was placed
+inflight_execution_requests:BlockDict[TrancheKey, int] = BlockDict('ei') # value is block height when the request was sent
 
 def intersect_ranges( a_low, a_high, b_low, b_high):
     low, high = max(a_low,b_low), min(a_high,b_high)
@@ -90,18 +93,24 @@ class TrancheTrigger:
             self.enable_price_trigger()
 
     def enable_price_trigger(self):
-        price_triggers[self.order.pool_address].add(self.price_trigger)
+        if self.price_constraints:
+            price_triggers[self.order.pool_address].add(self.price_trigger)
+        else:
+            unconstrained_price_triggers.add(self.price_trigger)
 
     def disable_price_trigger(self):
         price_triggers[self.order.pool_address].remove(self.price_trigger)
 
     def price_trigger(self, cur):
-        if all(pc.passes(cur) for pc in self.price_constraints):
+        if not self.price_constraints or all(pc.passes(cur) for pc in self.price_constraints):
             self.execute()
 
-    def execute(self):
-        log.info(f'execution request for {self.tk}')
-        execution_requests[self.tk] = current_block.get().height
+    def execute(self, proof: PriceProof = None):
+        old_req = execution_requests.get(self.tk)
+        height = current_block.get().height
+        if old_req is None or old_req.height <= height:
+            log.info(f'execution request for {self.tk}')
+            execution_requests[self.tk] = ExecutionRequest(height, proof)
 
     def disable(self):
         self.disable_time_trigger()
@@ -124,6 +133,7 @@ class OrderTriggers:
         self.order = order
         self.triggers = [TrancheTrigger(order, tk) for tk in self.order.tranche_keys]
         OrderTriggers.instances[order.key] = self
+        log.debug(f'created OrderTriggers for {order.key}')
 
     def disable(self):
         for t in self.triggers:
diff --git a/src/dexorder/runner.py b/src/dexorder/runner.py
index 5fce22f..001ce00 100644
--- a/src/dexorder/runner.py
+++ b/src/dexorder/runner.py
@@ -4,7 +4,8 @@ from typing import Callable, Union, Any, Iterable, Optional
 from web3.contract.contract import ContractEvents
 from web3.exceptions import LogTopicError, MismatchedABI
 
-from dexorder import Blockchain, db, blockchain, NARG, current_pub
+from dexorder import Blockchain, db, blockchain, NARG, current_pub, Account
+from dexorder.base.account import current_account
 from dexorder.base.chain import current_chain
 from dexorder.base.fork import current_fork, Fork
 from dexorder.blockchain.connection import create_w3_ws
@@ -126,7 +127,6 @@ class BlockStateRunner:
                                     else:
                                         lf = dict(log_filter)
                                         lf['blockHash'] = hexstr(block.hash)
-                                        print(lf)
                                         batches.append((w3.eth.get_logs(lf), callback, event, log_filter))
 
                             # set up for callbacks
diff --git a/src/dexorder/util/uniswap_util.py b/src/dexorder/util/uniswap_util.py
deleted file mode 100644
index 86aa5d6..0000000
--- a/src/dexorder/util/uniswap_util.py
+++ /dev/null
@@ -1,62 +0,0 @@
-import json
-import logging
-
-from eth_abi.packed import encode_packed
-from eth_utils import keccak, to_bytes, to_checksum_address
-
-from dexorder import config, current_w3
-from dexorder.base.chain import current_chain
-from dexorder.contract import ContractProxy
-from dexorder.util import hexstr
-
-log = logging.getLogger(__name__)
-
-factory = {}
-
-def get_factory() -> ContractProxy:
-    chain_id = current_chain.get().chain_id
-    found = factory.get(chain_id)
-    if found is None:
-        deployment_tag = config.deployments.get(str(chain_id), 'latest')
-        try:
-            with open(f'../contract/broadcast/Deploy.sol/{chain_id}/run-{deployment_tag}.json', 'rt') as file:
-                deployment = json.load(file)
-                for tx in deployment['transactions']:
-                    if tx['contractName'] == 'Factory':
-                        addr = tx['contractAddress']
-                        found = factory[chain_id] = ContractProxy(addr, 'Factory')
-                        log.info(f'Factory {addr}')
-                        break
-        except FileNotFoundError:
-            log.warning(f'Could not find deployment for chain {chain_id} "{deployment_tag}"')
-    return found
-
-
-def get_contract_data(name):
-    with open(f'../contract/out/{name}.sol/{name}.json', 'rt') as file:
-        return json.load(file)
-
-def get_contract_event(contract_name:str, event_name:str):
-    return getattr(current_w3.get().eth.contract(abi=get_contract_data(contract_name)['abi']).events, event_name)()
-
-
-VAULT_INIT_CODE_HASH = None
-
-def vault_address(owner, num):
-    global VAULT_INIT_CODE_HASH
-    if VAULT_INIT_CODE_HASH is None:
-        with open('../contract/out/Vault.sol/Vault.json', 'rt') as _file:
-            vault_info = json.load(_file)
-        VAULT_INIT_CODE_HASH = keccak(to_bytes(hexstr=vault_info['bytecode']['object']))
-        log.info(f'VAULT_INIT_CODE_HASH {hexstr(VAULT_INIT_CODE_HASH)}')
-    salt = keccak(encode_packed(['address','uint8'],[owner,num]))
-    contract_address = keccak(
-        b"\xff"
-        + to_bytes(hexstr=get_factory().address)
-        + salt
-        + VAULT_INIT_CODE_HASH
-    ).hex()[-40:]
-    addr = to_checksum_address(contract_address)
-    # log.debug(f'vault addr {owner} #{num} => {salt.hex()} {VAULT_INIT_CODE_HASH.hex()} = {addr}')
-    return addr
-