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fix: script for fixing lend APR (#31)
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from datetime import datetime | ||
from decimal import Decimal | ||
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from django.core.management.base import BaseCommand | ||
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from ajna.sources.subgraph import EthereumSubgraph, GoerliSubgraph | ||
from ajna.utils.graphql import GraphqlClient | ||
from ajna.utils.utils import datetime_to_next_full_hour | ||
from ajna.v1.ethereum.chain import EthereumModels | ||
from ajna.v1.goerli.chain import GoerliModels | ||
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class BlockSubgraph: | ||
def _fetch_all_by_field(self, query, key, field, value, page_size=1000): | ||
while True: | ||
variables = { | ||
field: value, | ||
"first": page_size, | ||
} | ||
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results = self.client.execute(query, variables=variables) | ||
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if "data" not in results: | ||
return None | ||
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data = results["data"][key] | ||
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# Don't use `yield from data` to take advantage of orphaned last row | ||
for row in data: # noqa: SIM104 | ||
yield row | ||
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if len(data) < page_size: | ||
break | ||
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# Since we're looping through all data above, we can harness the pythons | ||
# way of exposing last row from the loop | ||
value = int(row[field]) | ||
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class EthBlockSubgraph(BlockSubgraph): | ||
def __init__(self, *args, **kwargs): | ||
self.client = GraphqlClient( | ||
endpoint="https://api.thegraph.com/subgraphs/name/stakewise/ethereum-mainnet" | ||
) | ||
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class GoerliBlockSubgraph(BlockSubgraph): | ||
def __init__(self, *args, **kwargs): | ||
self.client = GraphqlClient( | ||
endpoint="https://api.thegraph.com/subgraphs/name/dramacrypto/goerli-blocks" | ||
) | ||
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class Command(BaseCommand): | ||
def _fix_goerli(self): | ||
goerli_blocks = self._get_goerli_blocks() | ||
models = GoerliModels() | ||
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self.stdout.write("Fixing goerli pool snapshot lend_rate") | ||
subgraph = GoerliSubgraph() | ||
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for dt, block in goerli_blocks.items(): | ||
query = """ | ||
query ($block: Int) { | ||
pools(block: {number: $block}) { | ||
id | ||
lendRate | ||
} | ||
} | ||
""" | ||
results = subgraph.client.execute(query, variables={"block": int(block)}) | ||
pools = results["data"]["pools"] | ||
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for pool in pools: | ||
try: | ||
snapshot = models.pool_snapshot.objects.get( | ||
address=pool["id"], datetime=dt | ||
) | ||
except models.pool_snapshot.DoesNotExist: | ||
self.stdout.write("ERROR {} {} {}".format(block, dt, pool)) | ||
continue | ||
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if snapshot.lend_rate != Decimal(pool["lendRate"]): | ||
snapshot.lend_rate = Decimal(pool["lendRate"]) | ||
snapshot.save(update_fields=["lend_rate"]) | ||
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def _fix_ethereum(self): | ||
eth_blocks = self._get_eth_blocks() | ||
models = EthereumModels() | ||
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self.stdout.write("Fixing ethereum pool snapshot lend_rate") | ||
subgraph = EthereumSubgraph() | ||
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for dt, block in eth_blocks.items(): | ||
query = """ | ||
query ($block: Int) { | ||
pools(block: {number: $block}) { | ||
id | ||
lendRate | ||
} | ||
} | ||
""" | ||
results = subgraph.client.execute(query, variables={"block": int(block)}) | ||
pools = results["data"]["pools"] | ||
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for pool in pools: | ||
try: | ||
snapshot = models.pool_snapshot.objects.get( | ||
address=pool["id"], datetime=dt | ||
) | ||
except models.pool_snapshot.DoesNotExist: | ||
self.stdout.write("ERROR {} {} {}".format(block, dt, pool)) | ||
continue | ||
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if snapshot.lend_rate != Decimal(pool["lendRate"]): | ||
snapshot.lend_rate = Decimal(pool["lendRate"]) | ||
snapshot.save(update_fields=["lend_rate"]) | ||
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def _get_eth_blocks(self): | ||
self.stdout.write("Fetching eth blocks") | ||
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block_number = 17667177 | ||
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query = """ | ||
query ( | ||
$first: Int, $id: Int | ||
) { | ||
blocks( | ||
first: $first | ||
orderBy: id | ||
orderDirection: asc | ||
where: {id_gt: $id} | ||
) { | ||
id | ||
timestamp | ||
} | ||
} | ||
""" | ||
block_map = {} | ||
client = EthBlockSubgraph() | ||
blocks = client._fetch_all_by_field( | ||
query, "blocks", "id", block_number, page_size=1000 | ||
) | ||
for block in blocks: | ||
dt = datetime_to_next_full_hour( | ||
datetime.fromtimestamp(int(block["timestamp"])) | ||
) | ||
block_map[dt] = block["id"] | ||
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return block_map | ||
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def _get_goerli_blocks(self): | ||
self.stdout.write("Fetching goerli blocks") | ||
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block_number = 9293748 | ||
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query = """ | ||
query ( | ||
$first: Int, $number: Int | ||
) { | ||
blocks( | ||
first: $first | ||
orderBy: number | ||
orderDirection: asc | ||
where: {number_gt: $number} | ||
) { | ||
number | ||
timestamp | ||
} | ||
} | ||
""" | ||
block_map = {} | ||
client = GoerliBlockSubgraph() | ||
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blocks = client._fetch_all_by_field( | ||
query, "blocks", "number", block_number, page_size=1000 | ||
) | ||
for block in blocks: | ||
dt = datetime_to_next_full_hour( | ||
datetime.fromtimestamp(int(block["timestamp"])) | ||
) | ||
block_map[dt] = block["number"] | ||
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return block_map | ||
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def handle(self, *args, **options): | ||
self._fix_goerli() | ||
self._fix_ethereum() |