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docs(foundry): add T1 features - 2D nonces, expiring nonces, access keys, sponsors, batching #55

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o-az merged 2 commits into from
Jan 30, 2026
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docs(foundry): add T1 features - 2D nonces, expiring nonces, access keys, sponsors, batching #55

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docs(foundry): add Tempo and T1 Foundry features
gakonst Jan 30, 2026
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docs(foundry): integrate new features into existing structure
gakonst Jan 30, 2026
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69 changes: 69 additions & 0 deletions src/pages/sdk/foundry/index.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -130,10 +130,24 @@ forge script script/Mail.s.sol \
--sender <YOUR_WALLET_ADDRESS> \
--broadcast \
--verify

# Batch multiple calls into a single atomic transaction
forge script script/Deploy.s.sol \
--broadcast --batch \
--rpc-url $TEMPO_RPC_URL \
--private-key $PRIVATE_KEY
```

For more verification options including verifying existing contracts and API verification, see [Contract Verification](/quickstart/verify-contracts).

:::warning[Batch Transaction Rules]
- **Atomic execution**: If any call reverts, the entire batch reverts
- **Single CREATE allowed**: At most one contract deployment per batch
- **CREATE must be first**: Deployment must be the first operation
- **Value must be zero**: Since Tempo has no native token, value must be 0
- **Silent failures**: Calling a non-existent function without a fallback succeeds silently
:::

### Interact & debug with `cast`

```bash
Expand Down Expand Up @@ -173,6 +187,61 @@ cast send <CONTRACT_ADDRESS> <FUNCTION_SIGNATURE> \
# Replay a transaction by hash:
cast run <TX_HASH> \
--rpc-url $TEMPO_RPC_URL

# Send a batch transaction with multiple calls:
cast batch-send \
--call "<CONTRACT_ADDRESS>::increment()" \
--call "<CONTRACT_ADDRESS>::setNumber(uint256):500" \
--rpc-url $TEMPO_RPC_URL \
--private-key $PRIVATE_KEY

# Batch with pre-encoded calldata:
ENCODED=$(cast calldata "setNumber(uint256)" 200)
cast batch-send \
--call "<CONTRACT_ADDRESS>::$ENCODED" \
--call "<CONTRACT_ADDRESS>::setNumber(uint256):101" \
--rpc-url $TEMPO_RPC_URL \
--private-key $PRIVATE_KEY

# Sponsored transaction (gasless for sender):
# Step 1: Get the fee payer signature hash
FEE_PAYER_HASH=$(cast mktx <CONTRACT_ADDRESS> 'increment()' \
--rpc-url $TEMPO_RPC_URL \
--private-key $SENDER_KEY \
--print-sponsor-hash)
# Step 2: Sponsor signs the hash
SPONSOR_SIG=$(cast wallet sign --private-key $SPONSOR_KEY "$FEE_PAYER_HASH" --no-hash)
# Step 3: Send with sponsor signature
cast send <CONTRACT_ADDRESS> 'increment()' \
--rpc-url $TEMPO_RPC_URL \
--private-key $SENDER_KEY \
--sponsor-signature "$SPONSOR_SIG"

# Send with 2D nonce (parallel tx submission):
cast send <CONTRACT_ADDRESS> 'increment()' \
--rpc-url $TEMPO_RPC_URL \
--private-key $PRIVATE_KEY \
--nonce 0 --nonce-key 1

# Send with expiring nonce (time-bounded tx, max 30s):
VALID_BEFORE=$(($(date +%s) + 25))
cast send <CONTRACT_ADDRESS> 'increment()' \
--rpc-url $TEMPO_RPC_URL \
--private-key $PRIVATE_KEY \
--expiring-nonce --valid-before $VALID_BEFORE

# Send with access key (delegated signing):
# First authorize the key via Account Keychain precompile
cast send 0xAAAAAAAA00000000000000000000000000000000 \
'authorizeKey(address,uint8,uint64,bool,(address,uint256)[])' \
$ACCESS_KEY_ADDR 0 1893456000 false "[]" \
--rpc-url $TEMPO_RPC_URL \
--private-key $ROOT_PRIVATE_KEY
# Then send using the access key
cast send <CONTRACT_ADDRESS> 'increment()' \
--rpc-url $TEMPO_RPC_URL \
--access-key $ACCESS_KEY_PRIVATE_KEY \
--root-account $ROOT_ADDRESS
```

### Limitations
Expand Down