Bifrost Slpx Stake

Execute liquid staking operations on Bifrost SLPx protocol across Ethereum, Base, Optimism, and Arbitrum. Mint vETH by staking ETH/WETH, redeem vETH back to...

copies: implexa run clawhub/bifrost-slpx-stake

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7.9/ 10

evaluated by implexa, claude-haiku-4-5 · 2026-05-26

bifrost-slpx-stake covers liquid staking on bifrost veth across ethereum, base, optimism, and arbitrum. supports minting veth from eth or weth, redeeming veth with queue-based withdrawal, and claiming completed redemptions. defaults to manual signing with optional agent-side key management.

structure

9.0

trigger phrases

6.0

procedure

8.0

edge cases

8.0

documentation

8.0

view original SKILL.md from clawhubclick to expand

---
name: bifrost-slpx-stake
description: |
  Execute liquid staking operations on Bifrost SLPx protocol across Ethereum, Base, Optimism,
  and Arbitrum. Mint vETH by staking ETH/WETH, redeem vETH back to ETH, and claim after
  redemption completes. Supports manual signing and agent-side signing via ERC-4626 vault.
  Use when users want to stake, unstake, mint, redeem, or claim ETH on Bifrost DeFi.
metadata:
  author: bifrost.io
  version: "1.0.0"
---

# Bifrost SLPx Stake

Execute Bifrost vETH liquid staking operations: mint, redeem, and claim.

## Contract & Network

vETH is deployed on Ethereum and three L2 networks. The same contract address is used across all chains.

| Chain | ChainId | VETH Contract | WETH (underlying) | Default RPC | Fallback RPC |
|-------|---------|---------------|--------------------|----|------|
| Ethereum | 1 | `0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8` | `0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2` | `https://ethereum.publicnode.com` | `https://1rpc.io/eth` |
| Base | 8453 | `0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8` | `0x4200000000000000000000000000000000000006` | `https://base.publicnode.com` | `https://1rpc.io/base` |
| Optimism | 10 | `0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8` | `0x4200000000000000000000000000000000000006` | `https://optimism.publicnode.com` | `https://1rpc.io/op` |
| Arbitrum | 42161 | `0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8` | `0x82aF49447D8a07e3bd95BD0d56f35241523fBab1` | `https://arbitrum-one.publicnode.com` | `https://1rpc.io/arb` |

## Configuration

On first run, ask the user whether they want to configure custom settings. If not, use the defaults above.

### Environment Variables

| Variable | Description | Default |
|----------|-------------|---------|
| `BIFROST_CHAIN` | Target chain name (`ethereum`, `base`, `optimism`, `arbitrum`) | `ethereum` |
| `BIFROST_RPC_URL` | Custom RPC endpoint | Per-chain default from table above |
| `BIFROST_VETH_ADDRESS` | VETH contract address (override) | `0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8` |
| `BIFROST_PRIVATE_KEY` | Private key for agent-side signing (hex, with or without 0x prefix) | Not set (manual signing mode) |

### Wallet Setup

Two signing modes. Default is manual signing (no setup needed).

**Default: Manual Signing**

Output complete transaction details (to, value, data, gas, chainId). User signs with their own wallet (MetaMask, Ledger, CLI, etc.).

**Option: Agent-Side Signing**

Set `BIFROST_PRIVATE_KEY` as an environment variable, or import via Foundry keystore:

```bash
cast wallet import bifrost-agent --interactive
```

When `BIFROST_PRIVATE_KEY` is set, the agent can sign and broadcast transactions directly using `cast send`.

## Quick Reference

### Write Operations

| Operation | Function | Selector | Description |
|-----------|----------|----------|-------------|
| Mint vETH (via ETH) | `depositWithETH()` | `0x1166dab6` | Stake native ETH to mint vETH. ETH is sent as `msg.value`. The contract wraps ETH → WETH internally — no ERC-20 approval needed. Reverts `EthNotSent()` if `msg.value == 0` |
| Mint vETH (via WETH) | `deposit(uint256,address)` | `0x6e553f65` | Deposit WETH directly to mint vETH for `receiver`. Requires prior WETH approval to the VETH contract |
| Redeem vETH | `redeem(uint256,address,address)` | `0xba087652` | Burn `shares` of vETH to initiate ETH withdrawal for `receiver`. ETH enters a redemption queue and is NOT returned instantly. Requires `owner == msg.sender` or sufficient allowance |
| Claim as ETH | `withdrawCompleteToETH()` | `0x3ec549e9` | Claim ALL completed withdrawals as native ETH. Internally calls `withdrawCompleteTo(this)` then unwraps WETH → ETH. Reverts `EthTransferFailed()` if ETH transfer fails |
| Claim as WETH | `withdrawComplete()` | `0x266a3bce` | Claim ALL completed withdrawals as WETH to `msg.sender`. Use this if `withdrawCompleteToETH()` fails |
| Claim to address | `withdrawCompleteTo(address)` | `0xf29ee493` | Claim ALL completed withdrawals as WETH to a specified `receiver` address |

### Pre-Execution Query Functions

| Query | Function | Selector | Description |
|-------|----------|----------|-------------|
| Preview deposit | `previewDeposit(uint256)` | `0xef8b30f7` | Simulate deposit and return exact vETH shares to be minted |
| Preview redeem | `previewRedeem(uint256)` | `0x4cdad506` | Simulate redemption and return exact ETH to be returned |
| Fallback: shares calc | `convertToShares(uint256)` | `0xc6e6f592` | Convert ETH amount to vETH shares using current Oracle exchange rate |
| Fallback: assets calc | `convertToAssets(uint256)` | `0x07a2d13a` | Convert vETH shares to ETH value using current Oracle exchange rate |
| vETH balance | `balanceOf(address)` | `0x70a08231` | Get vETH token balance of a specific address |
| Max redeemable | `maxRedeem(address)` | `0xd905777e` | Maximum vETH shares the owner can redeem in a single tx |
| Claimable ETH | `canWithdrawalAmount(address)` | `0x52a630b9` | Returns `(totalAvailableAmount, pendingDeleteIndex, pendingDeleteAmount)`. First value = ETH ready to claim |

## How to Call

**Read queries** — use `eth_call` (no gas):

```bash
# Method A: cast (preferred)
cast call <VETH_CONTRACT> \
  "<FUNCTION_SIGNATURE>(<ARG_TYPES>)(<RETURN_TYPES>)" <ARGS> \
  --rpc-url <RPC_URL>

# Method B: curl (if cast unavailable)
curl -s -X POST <RPC_URL> \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_call","params":[{"to":"<VETH_CONTRACT>","data":"<SELECTOR><ENCODED_ARGS>"},"latest"]}'
```

If `previewDeposit` or `previewRedeem` fails, fall back to `convertToShares` / `convertToAssets` (same encoding).

**Write transactions** — use `cast send` (requires wallet):

```bash
# Mint vETH (stake native ETH)
cast send <VETH_CONTRACT> \
  "depositWithETH()" --value <AMOUNT_IN_WEI> \
  --rpc-url <RPC_URL> --private-key <PRIVATE_KEY>

# Redeem vETH (unstake)
cast send <VETH_CONTRACT> \
  "redeem(uint256,address,address)" <SHARES_IN_WEI> <USER_ADDR> <USER_ADDR> \
  --rpc-url <RPC_URL> --private-key <PRIVATE_KEY>

# Claim ETH (withdraw completed redemptions)
cast send <VETH_CONTRACT> \
  "withdrawCompleteToETH()" \
  --rpc-url <RPC_URL> --private-key <PRIVATE_KEY>
```

### Calldata Encoding (for manual signing output)

- **uint256**: convert wei to hex, left-pad to 64 chars
- **address**: remove 0x prefix, left-pad to 64 chars
- `canWithdrawalAmount` returns 3 × uint256 (192 hex chars): `(totalAvailableAmount, pendingDeleteIndex, pendingDeleteAmount)`. First 64 chars = claimable ETH amount

## API 1: Mint vETH (Stake ETH)

### Pre-Execution

1. Query rate: `previewDeposit(amount)` → expected vETH
2. Check wallet: `BIFROST_PRIVATE_KEY` env var or Foundry keystore `bifrost-agent`
3. Display preview and wait for CONFIRM

### Transaction

| Field | Value |
|-------|-------|
| To | `<VETH_CONTRACT>` |
| Value | User's ETH amount in wei |
| Data | `0x1166dab6` |
| ChainId | Per selected chain |

### Manual Signing Output

```
To:       <VETH_CONTRACT>
Value:    {wei} ({amount} ETH)
Data:     0x1166dab6
ChainId:  {chainId}
```

## API 2: Redeem vETH (Unstake)

### Pre-Execution

1. Check `balanceOf(user)` ≥ redeem amount
2. Query `previewRedeem(shares)` → expected ETH
3. Check `maxRedeem(user)`
4. Display preview (warn: ETH enters queue, NOT instant) and wait for CONFIRM

### Transaction

| Field | Value |
|-------|-------|
| To | `<VETH_CONTRACT>` |
| Value | `0` |
| Data | ABI-encoded `redeem(shares, userAddr, userAddr)` |
| ChainId | Per selected chain |

Encode calldata: `cast calldata "redeem(uint256,address,address)" <SHARES> <ADDR> <ADDR>`

## API 3: Claim Redeemed ETH

### Pre-Execution

1. Check `canWithdrawalAmount(user)` — first return value = claimable amount
2. If 0: inform user redemption may still be processing
3. If > 0: display claimable amount and wait for CONFIRM

### Transaction

| Field | Value |
|-------|-------|
| To | `<VETH_CONTRACT>` |
| Value | `0` |
| Data | `0x3ec549e9` |
| ChainId | Per selected chain |

## Agent Behavior

1. **Environment check**: on first interaction, ask user if they want to configure `BIFROST_CHAIN`, `BIFROST_RPC_URL`, or `BIFROST_PRIVATE_KEY`. If not, use Ethereum Mainnet defaults with manual signing mode
2. **RPC selection**: use `BIFROST_RPC_URL` if set; otherwise use per-chain default RPC. Fall back to per-chain fallback RPC on failure
3. **Multi-chain awareness**: when user specifies a chain (e.g. "on Base", "on Arbitrum"), switch to that chain's RPC, WETH address, and chainId accordingly
4. **Wallet detection**: check `BIFROST_PRIVATE_KEY` env var or Foundry keystore `bifrost-agent`. If found, ask user whether to use it. If not, output tx data for manual signing
5. **CONFIRM required**: display transaction preview (amount, rate, expected output, chain) and require user to type **CONFIRM** before any write
6. **Private key import requires CONFIRM**: show security warning first, require CONFIRM before accepting key
7. **Key retention is user-controlled**: after tx, ask user whether to keep or delete the key
8. **Balance pre-check**: verify sufficient ETH/vETH before building tx
9. **Prefer cast, fall back to curl**: use pre-computed calldata from selector table if cast fails
10. **No credential display**: never echo private keys; truncate addresses (first 6 + last 4)
11. **Post-completion tip**: if no wallet configured, suggest "set up wallet" after operation
12. After successful tx, provide block explorer link: `https://etherscan.io/tx/{hash}` (Ethereum), `https://basescan.org/tx/{hash}` (Base), `https://optimistic.etherscan.io/tx/{hash}` (Optimism), `https://arbiscan.io/tx/{hash}` (Arbitrum)
13. **Useful links**: direct users to [Bifrost vETH page](https://www.bifrost.io/vtoken/veth) or [Bifrost App](https://app.bifrost.io/vstaking/vETH) when relevant

## Security

1. Private keys are opt-in only — default outputs unsigned tx data
2. Explicit CONFIRM for every write operation
3. Validate amounts against balance and protocol limits
4. Recommend dedicated wallet with limited funds for agent-side signing

## Error Handling

| Error | User Message |
|-------|-------------|
| `EthNotSent()` (0x8689d991) | "No ETH included. Please specify the amount." |
| `EthTransferFailed()` | "ETH transfer failed. Try claiming as WETH with withdrawComplete()." |
| `ZeroWithdrawAmount()` (0xd6d9e665) | "No claimable ETH. Your redemption may still be processing." |
| `ERC4626ExceededMaxRedeem` (0xb94abeec) | "Redeem exceeds your maximum. Check balance." |
| `Pausable: paused` | "VETH contract is paused. Try again later." |
| Insufficient ETH | "Insufficient ETH. Balance: {bal}, Needed: {amount + gas}." |
| Insufficient vETH | "Insufficient vETH. Balance: {bal}, Requested: {amount}." |
| Max withdraw count exceeded | "Too many pending redemptions. Claim existing ones first." |
| RPC failure | "Unable to connect. Retrying with backup endpoint..." |

## Notes

1. `depositWithETH()` wraps ETH → WETH internally via `WETH.deposit()`. No ERC-20 approval needed. For direct WETH deposits, use `deposit(uint256,address)` instead (requires WETH approval)
2. `withdrawCompleteToETH()` internally calls `withdrawCompleteTo(address(this))` to receive WETH, then unwraps to ETH via `WETH.withdraw()`, then sends ETH to caller. If ETH transfer fails, use `withdrawComplete()` to receive WETH instead
3. Redemption is NOT instant — `redeem()` / `withdraw()` add entries to the withdrawal queue, processed in batches via Bifrost cross-chain mechanism
4. All write functions are protected by `whenNotPaused` and `nonReentrant` (ReentrancyGuardUpgradeable)
5. Gas estimates are approximate; use `cast estimate` for accuracy

don't have the plugin yet? install it then click "run inline in claude" again.

restructured into implexa's 6-component format with explicit decision logic, edge cases (rpc fallback, rate limit handling, zero amounts), external dependency documentation, and standardized voice; preserved all original procedures and chain/contract details.

Bifrost SLPx Stake

Item: Bifrost Slpx Stake
Rating: 7.9
Author: Implexa

intent

stake ETH to mint vETH, redeem vETH to enter the withdrawal queue, and claim completed redemptions as ETH on Bifrost's liquid staking protocol. use this when users want to stake, unstake, or claim across Ethereum, Base, Optimism, or Arbitrum. supports both manual signing (unsigned tx output) and agent-side signing (direct broadcast) via a configured private key.

inputs

blockchain parameters

BIFROST_CHAIN: target chain name. options: ethereum (default), base, optimism, arbitrum. set via env var or interactive prompt on first run.
BIFROST_RPC_URL: custom RPC endpoint. if not set, uses per-chain default from table below. falls back to secondary RPC on first endpoint failure.
BIFROST_VETH_ADDRESS: vETH contract address. override default 0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8 if needed (rare).

signing & execution

BIFROST_PRIVATE_KEY: optional hex private key (with or without 0x prefix) for agent-side signing. if not set, skill outputs unsigned tx data for manual signing. can import via cast wallet import bifrost-agent --interactive to use Foundry keystore.

user inputs during execution

target operation: mint (stake ETH), redeem (unstake), or claim (withdraw completed redemptions)
amount: ETH or vETH amount in wei or decimal form
confirmation: explicit CONFIRM typed by user before any write operation

contract addresses & RPCs by chain

chain	chainid	veth contract	weth (underlying)	default rpc	fallback rpc
ethereum	1	`0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8`	`0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2`	`https://ethereum.publicnode.com`	`https://1rpc.io/eth`
base	8453	`0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8`	`0x4200000000000000000000000000000000000006`	`https://base.publicnode.com`	`https://1rpc.io/base`
optimism	10	`0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8`	`0x4200000000000000000000000000000000000006`	`https://optimism.publicnode.com`	`https://1rpc.io/op`
arbitrum	42161	`0xc3997ff81f2831929499c4eE4Ee4e0F08F42D4D8`	`0x82aF49447D8a07e3bd95BD0d56f35241523fBab1`	`https://arbitrum-one.publicnode.com`	`https://1rpc.io/arb`

external dependencies

rpc provider: ethereum-compatible json-rpc endpoint (default or custom)
signing tool: cast (foundry) for preferred path; curl as fallback for read queries
wallet: metamask, ledger, cli, or configured private key

procedure

step 1: initialize and prompt for configuration

on first invocation, ask user if they want to configure BIFROST_CHAIN, BIFROST_RPC_URL, or BIFROST_PRIVATE_KEY.
input: user answers (yes/no) and optionally provides custom values.
output: resolved config object with chain, rpc url, veth address, and signing mode (manual or agent).
if user declines, use ethereum mainnet defaults with manual signing mode.

step 2: detect signing capability

check for BIFROST_PRIVATE_KEY env var or Foundry keystore entry bifrost-agent.
input: environment state.
output: signing capability flag and key source (env var / keystore / none).
if key found, ask user whether to use it for this operation. if user imports key interactively, show security warning and require CONFIRM before accepting.

step 3: validate target operation and user inputs

ask user to specify operation: mint, redeem, or claim.
for mint/redeem: ask for amount in eth or veth (human-readable decimal or wei).
convert amount to wei as needed.
input: operation type, amount string.
output: validated operation, amount in wei.
if input is invalid or missing, re-prompt with hint.

step 4: fetch pre-execution state via read queries

for mint:

call previewDeposit(amount_in_wei) to get expected vETH output.
if previewDeposit fails, fall back to convertToShares(amount_in_wei).
fetch user's current ETH balance on the selected chain via eth_getBalance.
input: user address, amount in wei, rpc url.
output: expected veth shares (uint256), user eth balance.
verify user has sufficient ETH (amount + estimated gas).

for redeem:

call balanceOf(user_address) to get current vETH balance.
call maxRedeem(user_address) to get maximum redeemable vETH in a single tx.
call previewRedeem(shares_in_wei) to get expected ETH output.
if previewRedeem fails, fall back to convertToAssets(shares_in_wei).
input: user address, shares in wei, rpc url.
output: user's veth balance, max redeemable, expected eth output.
verify user's requested redeem amount <= user's veth balance and <= max redeemable.

for claim:

call canWithdrawalAmount(user_address) and extract the first return value (totalAvailableAmount).
input: user address, rpc url.
output: claimable eth in wei.
if claimable amount is 0, inform user redemption may still be processing and abort.

step 5: build and display transaction preview

show user: operation, input amount, output amount, chain, estimated gas cost (if available), veth contract address (truncated).
for redeem, add warning: "ETH enters redemption queue and is NOT returned instantly".
for claim, display claimable amount.
input: operation details, rates, chain info.
output: formatted preview text.

step 6: wait for user confirmation

require user to type CONFIRM (case-insensitive) to proceed.
input: user text input.
output: confirmation flag (true/false).
if user does not confirm, abort operation and offer to retry.

step 7: build transaction calldata

for mint (depositWithETH):

selector: 0x1166dab6 (no args).
tx data: 0x1166dab6 (function selector only).
tx value: user's eth amount in wei.

for redeem:

function signature: redeem(uint256,address,address).
selector: 0xba087652.
encode args: shares (uint256), user address, user address.
use cast calldata "redeem(uint256,address,address)" <shares_in_wei> <user_addr> <user_addr> to generate encoded calldata.
fallback: manually encode if cast fails (left-pad each uint256 to 64 hex chars, each address to 64 hex chars after removing 0x).
tx data: 0xba087652 + encoded args.
tx value: 0.

for claim (withdrawCompleteToETH):

selector: 0x3ec549e9 (no args).
tx data: 0x3ec549e9.
tx value: 0.
input: operation type, amount in wei, user address, rpc url.
output: tx object with to, value, data, chainid.

step 8: execute or output transaction

if agent-side signing is enabled (BIFROST_PRIVATE_KEY is set):

use cast send <veth_contract> <function> <args> --value <value_in_wei> --rpc-url <rpc_url> --private-key <private_key> --chain-id <chain_id> to sign and broadcast.
capture tx hash from cast output.
input: tx calldata, private key, rpc url, chain id.
output: tx hash, on-chain receipt (if wait succeeds).
if cast send fails (rpc error, nonce conflict, insufficient gas, etc.), report error with reason and suggest retry or manual signing.
after successful broadcast, ask user whether to keep or delete the configured private key from this session.

if manual signing (no BIFROST_PRIVATE_KEY):

output unsigned tx details in human-readable format: to (truncated), value (in wei and eth), data (hex), chainid.
suggest user sign with metamask, ledger, or cli tool.
input: none (waiting for user to sign externally).
output: formatted tx output (to, value, data, chainid).

step 9: post-execution feedback

if agent-side signing was used: provide block explorer link for the tx hash (etherscan.io for ethereum, basescan.org for base, optimistic.etherscan.io for optimism, arbiscan.io for arbitrum).
include shorthand like "https://etherscan.io/tx/{tx_hash}".
if operation was successful and user hasn't set up a wallet, suggest "consider setting up agent-side signing with a dedicated wallet for faster operations next time".
suggest relevant resources: bifrost.io/vtoken/veth or app.bifrost.io/vstaking/veth.

decision points

chain selection

if user specifies a chain in natural language (e.g. "on Base", "on Arbitrum"), switch to that chain's rpc, weth address, and chainid. otherwise use BIFROST_CHAIN env var. otherwise use ethereum mainnet.

signing mode

if BIFROST_PRIVATE_KEY env var is set or Foundry keystore bifrost-agent exists, ask user: "Use agent-side signing? [yes/no]". if yes, proceed with cast send. if no or key not available, output unsigned tx data for manual signing.

rpc selection

if BIFROST_RPC_URL is set, use it. otherwise use per-chain default rpc from config table. if default rpc fails (timeout, 429, connection refused), automatically retry with per-chain fallback rpc. if both fail, report network error and abort.

preview fallback

if previewDeposit or previewRedeem call fails, fall back to convertToShares or convertToAssets respectively (same calldata encoding, compatible return types).

claimable amount check

call canWithdrawalAmount(user_address) before claim. if the first return value (totalAvailableAmount) is 0, inform user "no claimable eth yet; your redemption may still be processing" and abort. if > 0, allow claim.

balance pre-check (mint)

if user's eth balance < (amount + estimated gas), report "insufficient eth" with balance and required amount. do not build tx.

balance pre-check (redeem)

if user's veth balance < requested redeem amount, report "insufficient veth" with balance and requested amount. do not build tx.
if requested redeem amount > maxRedeem(user), report "redeem exceeds your maximum" and do not build tx.

max redeem check (redeem)

check if user has too many pending redemptions (contract limit varies). if maxRedeem returns 0, report "too many pending redemptions; claim existing ones first" and abort.

contract paused state

if any write tx reverts with "Pausable: paused", report "veth contract is paused; try again later".

eth transfer failure fallback (claim)

if withdrawCompleteToETH reverts with EthTransferFailed (0xe1cd6bed), suggest "eth transfer failed; try claiming as weth with withdrawComplete() instead".

zero amount safeguard

if user specifies 0 eth or 0 veth, reject with "amount must be > 0".

output contract

for manual signing (unsigned tx output):

To:       0xc399... (truncated veth contract address)
Value:    {amount_in_wei} ({amount_in_eth} ETH)
Data:     {tx_calldata_hex}
ChainId:  {chain_id}

for agent-side signing (signed & broadcast):

tx hash: 0x{32-byte-hash-hex}
explorer link: https://{chain-explorer}/tx/{tx_hash}

for read queries (preview rates):

expected output (veth for mint, eth for redeem): human-readable decimal with 18-decimal precision
claimable eth (for claim): human-readable decimal

on error:

error type and user-friendly message (see error handling section)
no credential echo (private keys, full addresses, or seed phrases must never be displayed)

recommended output locations:

tx hash: printed to stdout, copied to clipboard if agent tool supports it
unsigned tx: printed to stdout for user copy-paste
error logs: printed to stderr with timestamp

outcome signal

successful mint:

tx was broadcast (agent-side) or unsigned tx output was generated (manual signing)
user sees explorer link (agent-side) or has unsigned tx data ready for manual signing
user receives expected veth shares (wait for on-chain confirmation if agent-side)

successful redeem:

tx was broadcast or unsigned tx output generated
user sees confirmation: "redemption queued; your eth will be available for claim once batch processing completes (typically 1-7 days)"
user receives explorer link or unsigned tx data

successful claim:

tx was broadcast or unsigned tx output generated
user sees claimable eth amount and explorer link (agent-side) or has unsigned tx data
on-chain: user's wallet receives eth, veth burn/transfer is recorded on chain

abort signals (user knows operation did not execute):

"operation cancelled" (user declined CONFIRM prompt)
"insufficient {eth/veth}" (balance check failed)
"no claimable eth yet" (claim pre-check failed)
"redemption processing; check back later" (canWithdrawalAmount returned 0)
"network error; unable to connect to rpc" (rpc failures persist after fallback)
"error: {error_message}" (contract revert, gas limit exceeded, nonce conflict, etc.)

private key lifecycle signal:

if agent-side signing was used, after tx, ask: "keep private key in this session? [yes/no]". if no, delete from memory/env.
security best practice: users should see "private key has been cleared from this session" after opting out.

Bifrost Slpx Stake

related skills

Bifrost SLPx Stake

intent

inputs

procedure

step 1: initialize and prompt for configuration

step 2: detect signing capability

step 3: validate target operation and user inputs

step 4: fetch pre-execution state via read queries

step 5: build and display transaction preview

step 6: wait for user confirmation

step 7: build transaction calldata

step 8: execute or output transaction

step 9: post-execution feedback

decision points

output contract

outcome signal