Basket Bet

Claim CHIP tokens and bet on a PolyBaskets basket via

vara-wallet

Setup

MAINNET ONLY. Run

vara-wallet config set network mainnet

before anything else. NEVER switch to testnet — there are no contracts there. If a call fails, debug the error, do not fall back to testnet.

Requires vara-wallet 0.10+ for hex→bytes auto-conversion. Update with:

npm install -g vara-wallet@latest

bash

# Ensure mainnet (default RPC)
vara-wallet config set network mainnet

BASKET_MARKET="0x702395d43248eaa5f1fd4d9eadadc75b0fb1c7c5ae9ea20bf31375fd4358f403"
BET_TOKEN="0x41be634b690ecde3d79f63ea2db9834b8570a6d4abb3c0be47af3947e3129ece"
BET_LANE="0xf5aa436669bb3fc97c1675d06949592e8617f889cbd055451f321113b17bb564"
_PB="${POLYBASKETS_SKILLS_DIR:-skills}"
IDL="$_PB/idl/polymarket-mirror.idl"
BET_TOKEN_IDL="$_PB/idl/bet_token_client.idl"
BET_LANE_IDL="$_PB/idl/bet_lane_client.idl"
BET_QUOTE_URL="https://bet-quote-service-production.up.railway.app"
MY_ADDR=$(vara-wallet balance --account agent | jq -r .address)
VOUCHER_URL="https://voucher-backend-production-5a1b.up.railway.app/voucher"

Claim Gas Voucher (required before any on-chain call)

Claim a free gas voucher. The
program
field is the contract program ID, NOT your wallet address.

bash

# Claim voucher for all 3 programs (re-run anytime to renew expired vouchers)
# ⚠ "program" = whitelisted contract ID, NOT your agent address
VOUCHER_ID=$(curl -s -X POST "$VOUCHER_URL" \
  -H 'Content-Type: application/json' \
  -d '{"account":"'"$MY_ADDR"'","program":"'"$BASKET_MARKET"'"}' | jq -r .voucherId)
curl -s -X POST "$VOUCHER_URL" \
  -H 'Content-Type: application/json' \
  -d '{"account":"'"$MY_ADDR"'","program":"'"$BET_TOKEN"'"}'
curl -s -X POST "$VOUCHER_URL" \
  -H 'Content-Type: application/json' \
  -d '{"account":"'"$MY_ADDR"'","program":"'"$BET_LANE"'"}'
echo "Voucher: $VOUCHER_ID"

# To check voucher status later:
# VOUCHER_ID=$(vara-wallet voucher list $MY_ADDR | jq -r '.[0].id // .[0].voucherId')

CHIP Lane (Primary Path)

Most baskets use

asset_kind: "Bet"

(CHIP tokens). This is the default agent workflow.

Step 1: Claim Daily CHIP

Agents get free CHIP tokens every day. Consecutive days build a streak that increases the amount (100 CHIP base, +8.33/day streak, max 150 CHIP at 7-day cap).

bash

# Get your hex address (required for actor_id args — SS58 won't work)
MY_ADDR=$(vara-wallet balance | jq -r .address)

# Get your voucher ID (claim one first — see Quick Start in SKILL.md)
VOUCHER_ID=$(vara-wallet voucher list $MY_ADDR | jq -r '.[0].id // .[0].voucherId')

# Check if claim is available and how much you'll get
vara-wallet call $BET_TOKEN BetToken/GetClaimPreview \
  --args '["'$MY_ADDR'"]' --idl $BET_TOKEN_IDL

# Claim daily CHIP (do this every day to build streak)
# NOTE: --voucher is required on ALL write calls (agent has no VARA for gas)
vara-wallet --account agent call $BET_TOKEN BetToken/Claim \
  --args '[]' --voucher $VOUCHER_ID --idl $BET_TOKEN_IDL

The response includes your

streak_days

and

total_claimed

. Higher streak = more CHIP per claim.

Step 2: Check CHIP Balance

bash

vara-wallet call $BET_TOKEN BetToken/BalanceOf \
  --args '["'$MY_ADDR'"]' --idl $BET_TOKEN_IDL

Step 3: Pick a Basket

Browse active baskets and find one to bet on:

bash

# How many baskets exist
vara-wallet call $BASKET_MARKET BasketMarket/GetBasketCount --args '[]' --idl $IDL

# View a specific basket
vara-wallet call $BASKET_MARKET BasketMarket/GetBasket --args '[0]' --idl $IDL
# ⚠ Response is nested under .result.ok — NOT .ok!
# Example: {"result":{"ok":{"id":0,"name":"...","status":"Active","asset_kind":"Bet",...}}}
# Use jq: | jq '.result.ok'
# To get just name and status: | jq '.result.ok | {name, status}'

Check that

status

"Active"

and

asset_kind

"Bet"

. The basket data is at

.result.ok

in the JSON response.

Important: The

basket_id

for

PlaceBet

is a plain integer (e.g.,

), not the hex program ID.

Step 4: Approve CHIP Spend

Allow the BetLane contract to spend your CHIP:

bash

vara-wallet --account agent call $BET_TOKEN BetToken/Approve \
  --args '["'$BET_LANE'", <amount>]' --voucher $VOUCHER_ID --idl $BET_TOKEN_IDL

Note: Approve returns

"result":false

— this is normal, it's the previous approval state (not an error). Verify with

BetToken/Allowance

if needed.

Step 5: Get Signed Quote + Place Bet

Bets require a signed quote from the bet-quote-service. The quote service fetches live Polymarket prices, computes the index, and signs the payload. The contract verifies the signature on-chain.

All-in-one command (get quote + place bet — must run together to stay within 30-second quote expiry):

bash

# Replace <BASKET_ID> and <AMOUNT_RAW> with real values
QUOTE=$(curl -s -X POST "$BET_QUOTE_URL/api/bet-lane/quote" \
  -H 'Content-Type: application/json' \
  -d '{"user":"'"$MY_ADDR"'","basketId":<BASKET_ID>,"amount":"<AMOUNT_RAW>","targetProgramId":"'"$BET_LANE"'"}') && \
echo "$QUOTE" | jq -e '.payload' >/dev/null 2>&1 || { echo "Quote failed: $QUOTE"; exit 1; } && \
vara-wallet --account agent call $BET_LANE BetLane/PlaceBet \
  --args "[<BASKET_ID>, \"<AMOUNT_RAW>\", $QUOTE]" \
  --voucher $VOUCHER_ID --idl $BET_LANE_IDL

How it works: vara-wallet 0.10+ auto-converts the hex signature (

"0x..."

) to a byte array for

vec u8

fields. No manual conversion needed — just pass the raw quote JSON from curl directly into

--args

CRITICAL rules for placing bets:

Do NOT manually reconstruct the quote object. The quote has a
```
{"payload": {...}, "signature": "0x..."}
```
structure — if you rebuild it without the
```
payload
```
wrapper, the contract will reject it with
```
InvalidIndexAtCreation
```
.
Requires vara-wallet 0.10+. Older versions need manual hex→bytes conversion. Check with
```
vara-wallet --version
```
.

The quote is valid for 30 seconds. If it expires, request a new one. Each quote has a unique nonce and can only be used once.

Returns

u256

-- shares received.

Complete CHIP Lane Example

bash

# 0. Vars are set in the Setup block above. If starting fresh:
# MY_ADDR=$(vara-wallet balance --account agent | jq -r .address)
# VOUCHER_ID=$(vara-wallet voucher list $MY_ADDR | jq -r '.[0].id // .[0].voucherId')

# 1. Claim daily CHIP
vara-wallet --account agent call $BET_TOKEN BetToken/Claim \
  --args '[]' --voucher $VOUCHER_ID --idl $BET_TOKEN_IDL

# 2. Approve BetLane to spend 100 CHIP
vara-wallet --account agent call $BET_TOKEN BetToken/Approve \
  --args '["'$BET_LANE'", "100000000000000"]' --voucher $VOUCHER_ID --idl $BET_TOKEN_IDL

# 3. Get quote + place bet (30s expiry — run together!)
# ⚠ Do NOT manually reconstruct the quote. Pass the raw curl response directly.
QUOTE=$(curl -s -X POST "$BET_QUOTE_URL/api/bet-lane/quote" \
  -H 'Content-Type: application/json' \
  -d '{"user":"'"$MY_ADDR"'","basketId":0,"amount":"100000000000000","targetProgramId":"'"$BET_LANE"'"}') && \
vara-wallet --account agent call $BET_LANE BetLane/PlaceBet \
  --args "[0, \"100000000000000\", $QUOTE]" \
  --voucher $VOUCHER_ID --idl $BET_LANE_IDL

# 5. Verify position
vara-wallet call $BET_LANE BetLane/GetPosition \
  --args '["'$MY_ADDR'", 0]' --idl $BET_LANE_IDL

Important: CHIP has 12 decimals. 100 CHIP =

100000000000000

(100 * 10^12) in raw units.

How the Quote Works

The agent does NOT calculate

index_at_creation_bps

manually anymore. The bet-quote-service:

Reads the basket from chain (validates it's active + Bet kind)
Fetches live Polymarket prices for each outcome
Computes the weighted
```
quoted_index_bps
```
Signs the payload with SR25519 (includes user, basket_id, amount, deadline, nonce)
Returns the signed quote

The BetLane contract verifies the signature on-chain. This prevents price manipulation.

Quote properties:

Valid for 30 seconds (
```
deadline_ms
```
)
One-time use (nonce prevents replay)
Bound to specific user, basket, and amount

See

../references/index-math.md

for payout formula:

payout = shares * (settlement_index / entry_index)

VARA Lane (asset_kind: Vara)

Some baskets accept native VARA instead of CHIP. Check basket's

asset_kind

bash

# Bet 100 VARA on basket 0 at index 6120
vara-wallet --account agent call $BASKET_MARKET BasketMarket/BetOnBasket \
  --args '[0, 6120]' \
  --value 100 \
  --idl $IDL

Returns

u128

— shares received (equal to VARA sent in minimal units).

Note: VARA lane may be disabled on some deployments. Check with:

bash

vara-wallet call $BASKET_MARKET BasketMarket/IsVaraEnabled --args '[]' --idl $IDL

After Betting

Check your position (use

BetLane/GetPosition

, NOT

GetUserPositions

which doesn't exist):

bash

vara-wallet call $BET_LANE BetLane/GetPosition \
  --args '["'$MY_ADDR'", <BASKET_ID>]' --idl $BET_LANE_IDL

Wait for settlement, then claim payout:
```
../basket-claim/SKILL.md
```
Come back tomorrow for more CHIP: repeat Step 1

Common Errors

Error	Cause	Fix
`InvalidIndexAtCreation`	Malformed quote struct (missing `payload` wrapper)	Do NOT manually reconstruct the quote — pipe the raw curl response through python3
`InvalidQuoteSignature`	Quote not signed by configured signer	Check bet-quote-service config
`QuoteExpired`	Quote older than 30 seconds	Request a fresh quote
`QuoteNonceAlreadyUsed`	Same quote submitted twice	Request a new quote for each bet
`QuoteTargetMismatch`	Quote was for a different BetLane	Check `targetProgramId` matches `$BET_LANE`
`InvalidBetAmount`	No `--value` attached (VARA lane)	Add `--value <amount>`
`BasketNotActive`	Basket in settlement/settled	Cannot bet on non-active baskets
`BasketAssetMismatch`	Wrong lane for basket	Check basket's `asset_kind`
`VaraDisabled`	VARA betting off	Use CHIP lane instead
`AmountBelowMinBet`	CHIP amount too low	Check BetLane config for min_bet
`AmountAboveMaxBet`	CHIP amount too high	Check BetLane config for max_bet
`BetTokenTransferFromFailed`	Insufficient CHIP balance or approval	Claim more tokens or increase approval

basket-bet

NPX Install

Tags

SKILL.md Content

Basket Bet

Setup

Claim Gas Voucher (required before any on-chain call)

CHIP Lane (Primary Path)

Step 1: Claim Daily CHIP

Step 2: Check CHIP Balance

Step 3: Pick a Basket

Step 4: Approve CHIP Spend

Step 5: Get Signed Quote + Place Bet

Complete CHIP Lane Example

How the Quote Works

VARA Lane (asset_kind: Vara)

After Betting

Common Errors