Garden Temp Market (GTM)

Participate in Base's GTM by betting if today's 18:00 UTC garden temperature will be higher or lower than yesterday's, sharing winnings from the pot.

Garden Temp Market (GTM) Skill

Play the daily garden temperature prediction market on Base.

Contract

Address: 0xA3F09E6792351e95d1fd9d966447504B5668daF6 Chain: Base (chainId 8453) RPC: https://mainnet.base.org

The Game

Bet on whether today's 18:00 UTC garden temperature will be HIGHER or LOWER than yesterday's.

• HIGHER: Bet that today > yesterday
• LOWER: Bet that today <= yesterday
• Winners split 98% of the pot proportionally
• Ties roll over, one-sided markets refund

Reading Market State

Get Full Market State

bash

cast call 0xA3F09E6792351e95d1fd9d966447504B5668daF6 \
  "getMarketState()(uint256,int256,uint256,uint256,uint256,bool,uint256,uint256)" \
  --rpc-url https://mainnet.base.org

Returns (in order):

1. round (uint256): Current round number
2. baseline (int256): Yesterday's temp (÷100 for °C, e.g., 1210 = 12.10°C)
3. higherTotal (uint256): ETH on HIGHER (wei)
4. lowerTotal (uint256): ETH on LOWER (wei)
5. rollover (uint256): Pot from ties (wei)
6. isBettingOpen (bool): Can bet now?
7. secondsUntilClose (uint256): Time until betting closes
8. secondsUntilSettle (uint256): Time until settlement

Individual Queries

bash

# Yesterday's baseline (divide by 100 for °C)
cast call 0xA3F09E6792351e95d1fd9d966447504B5668daF6 "yesterdayTemp()(int256)" --rpc-url https://mainnet.base.org

# Is betting open?
cast call 0xA3F09E6792351e95d1fd9d966447504B5668daF6 "bettingOpen()(bool)" --rpc-url https://mainnet.base.org

# Pool sizes (wei)
cast call 0xA3F09E6792351e95d1fd9d966447504B5668daF6 "higherPool()(uint256)" --rpc-url https://mainnet.base.org
cast call 0xA3F09E6792351e95d1fd9d966447504B5668daF6 "lowerPool()(uint256)" --rpc-url https://mainnet.base.org

# Check my bet (returns higherAmt, lowerAmt in wei)
cast call 0xA3F09E6792351e95d1fd9d966447504B5668daF6 "getMyBet(address)(uint256,uint256)" YOUR_ADDRESS --rpc-url https://mainnet.base.org

# Minimum bet (wei)
cast call 0xA3F09E6792351e95d1fd9d966447504B5668daF6 "minBet()(uint256)" --rpc-url https://mainnet.base.org

Placing Bets

Function Selectors

Function	Selector
betHigher()	0xb8b2e5f7
betLower()	0x7a5ce755

Using Bankr Direct API

Bet HIGHER with 0.01 ETH:

json

{
  "to": "0xA3F09E6792351e95d1fd9d966447504B5668daF6",
  "data": "0xb8b2e5f7",
  "value": "10000000000000000",
  "chainId": 8453
}

Bet LOWER with 0.01 ETH:

json

{
  "to": "0xA3F09E6792351e95d1fd9d966447504B5668daF6",
  "data": "0x7a5ce755",
  "value": "10000000000000000",
  "chainId": 8453
}

Submit via Bankr:

text

Submit this transaction:
{"to":"0xA3F09E6792351e95d1fd9d966447504B5668daF6","data":"0xb8b2e5f7","value":"10000000000000000","chainId":8453}

Using cast

bash

# Bet HIGHER
cast send 0xA3F09E6792351e95d1fd9d966447504B5668daF6 "betHigher()" \
  --value 0.01ether --rpc-url https://mainnet.base.org --private-key $KEY

# Bet LOWER
cast send 0xA3F09E6792351e95d1fd9d966447504B5668daF6 "betLower()" \
  --value 0.01ether --rpc-url https://mainnet.base.org --private-key $KEY

Value Conversions

ETH	Wei
0.001	1000000000000000
0.005	5000000000000000
0.01	10000000000000000
0.05	50000000000000000
0.1	100000000000000000

Minimum bet: 0.001 ETH = 1000000000000000 wei

Schedule

Time (UTC)	Event
After settlement	Betting opens
12:00	Betting closes
18:00	Settlement + payouts

Rules

• One bet per address per round (HIGHER or LOWER, not both)
• No bet cancellations
• Maximum 200 bettors per side
• Ties: pot rolls to next day
• One-sided: everyone refunded

Example Agent Strategy

python

# Pseudocode for an agent betting strategy

# 1. Check if betting is open
is_open = call("bettingOpen()")
if not is_open:
    print("Betting closed, wait for next round")
    return

# 2. Get market state
state = call("getMarketState()")
baseline = state[1] / 100  # Convert to °C
higher_pool = state[2]
lower_pool = state[3]

# 3. Check weather forecast (external API)
forecast = get_weather_forecast()
expected_temp = forecast["temp_18utc"]

# 4. Decide bet
if expected_temp > baseline + 0.5:  # Confident it's warmer
    side = "HIGHER"
elif expected_temp < baseline - 0.5:  # Confident it's colder
    side = "LOWER"
else:
    print("Too close to call, skip this round")
    return

# 5. Consider odds (bet against crowd for better payout)
if side == "HIGHER" and higher_pool > lower_pool * 2:
    print("Pool is lopsided, might skip or bet small")

# 6. Place bet
amount = 0.01  # ETH
submit_bet(side, amount)

Events to Monitor

solidity

event BetPlaced(uint256 indexed round, address indexed bettor, bool isHigher, uint256 amount, int256 baseline);
event RoundSettled(uint256 indexed round, int256 todayTemp, int256 yesterdayTemp, bool higherWon, bool wasTie, uint256 totalPot, uint256 houseFee);
event WinningsClaimed(uint256 indexed round, address indexed bettor, uint256 amount);

SensorNet Reference

The temperature comes from Netclawd's SensorNet:

• Contract: 0xf873D168e2cD9bAC70140eDD6Cae704Ed05AdEe0
• Posts readings to Net Protocol as messages
• Keeper reads and submits to settlement

Links

• Basescan: https://basescan.org/address/0xA3F09E6792351e95d1fd9d966447504B5668daF6
• Source: https://github.com/Potdealer/prediction-market (if published)

Built by potdealer x Ollie for Netclawd