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api: Document StateSearchMsg replaced message behavior
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@magik6k
magik6k committed Mar 18, 2021
1 parent 73eabc3 commit f026827
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42 changes: 42 additions & 0 deletions api/api_full.go
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Original file line number Diff line number Diff line change
Expand Up @@ -404,13 +404,55 @@ type FullNode interface {
// StateSearchMsg searches for a message in the chain, and returns its receipt and the tipset where it was executed
StateSearchMsg(context.Context, cid.Cid) (*MsgLookup, error)
// StateSearchMsgLimited looks back up to limit epochs in the chain for a message, and returns its receipt and the tipset where it was executed
//
// NOTE: If a replacing message is found on chain, this method will return
// a MsgLookup for the replacing message - the MsgLookup.Message will be a different
// CID than the one provided in the 'cid' param, MsgLookup.Receipt will contain the
// result of the execution of the replacing message.
//
// If the caller wants to ensure that exactly the requested message was executed,
// they MUST check that MsgLookup.Message is equal to the provided 'cid'.
// Without this check both the requested and original message may appear as
// successfully executed on-chain, which may look like a double-spend.
//
// A replacing message is a message with a different CID, any of Gas values, and
// different signature, but with all other parameters matching (source/destination,
// nonce, params, etc.)
StateSearchMsgLimited(ctx context.Context, msg cid.Cid, limit abi.ChainEpoch) (*MsgLookup, error)
// StateWaitMsg looks back in the chain for a message. If not found, it blocks until the
// message arrives on chain, and gets to the indicated confidence depth.
//
// NOTE: If a replacing message is found on chain, this method will return
// a MsgLookup for the replacing message - the MsgLookup.Message will be a different
// CID than the one provided in the 'cid' param, MsgLookup.Receipt will contain the
// result of the execution of the replacing message.
//
// If the caller wants to ensure that exactly the requested message was executed,
// they MUST check that MsgLookup.Message is equal to the provided 'cid'.
// Without this check both the requested and original message may appear as
// successfully executed on-chain, which may look like a double-spend.
//
// A replacing message is a message with a different CID, any of Gas values, and
// different signature, but with all other parameters matching (source/destination,
// nonce, params, etc.)
StateWaitMsg(ctx context.Context, cid cid.Cid, confidence uint64) (*MsgLookup, error)
// StateWaitMsgLimited looks back up to limit epochs in the chain for a message.
// If not found, it blocks until the message arrives on chain, and gets to the
// indicated confidence depth.
//
// NOTE: If a replacing message is found on chain, this method will return
// a MsgLookup for the replacing message - the MsgLookup.Message will be a different
// CID than the one provided in the 'cid' param, MsgLookup.Receipt will contain the
// result of the execution of the replacing message.
//
// If the caller wants to ensure that exactly the requested message was executed,
// they MUST check that MsgLookup.Message is equal to the provided 'cid'.
// Without this check both the requested and original message may appear as
// successfully executed on-chain, which may look like a double-spend.
//
// A replacing message is a message with a different CID, any of Gas values, and
// different signature, but with all other parameters matching (source/destination,
// nonce, params, etc.)
StateWaitMsgLimited(ctx context.Context, cid cid.Cid, confidence uint64, limit abi.ChainEpoch) (*MsgLookup, error)
// StateListMiners returns the addresses of every miner that has claimed power in the Power Actor
StateListMiners(context.Context, types.TipSetKey) ([]address.Address, error)
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42 changes: 42 additions & 0 deletions documentation/en/api-methods.md
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Expand Up @@ -4583,6 +4583,20 @@ Response:
### StateSearchMsgLimited
StateSearchMsgLimited looks back up to limit epochs in the chain for a message, and returns its receipt and the tipset where it was executed

NOTE: If a replacing message is found on chain, this method will return
a MsgLookup for the replacing message - the MsgLookup.Message will be a different
CID than the one provided in the 'cid' param, MsgLookup.Receipt will contain the
result of the execution of the replacing message.

If the caller wants to ensure that exactly the requested message was executed,
they MUST check that MsgLookup.Message is equal to the provided 'cid'.
Without this check both the requested and original message may appear as
successfully executed on-chain, which may look like a double-spend.

A replacing message is a message with a different CID, any of Gas values, and
different signature, but with all other parameters matching (source/destination,
nonce, params, etc.)


Perms: read

Expand Down Expand Up @@ -4877,6 +4891,20 @@ Response: `"0"`
StateWaitMsg looks back in the chain for a message. If not found, it blocks until the
message arrives on chain, and gets to the indicated confidence depth.

NOTE: If a replacing message is found on chain, this method will return
a MsgLookup for the replacing message - the MsgLookup.Message will be a different
CID than the one provided in the 'cid' param, MsgLookup.Receipt will contain the
result of the execution of the replacing message.

If the caller wants to ensure that exactly the requested message was executed,
they MUST check that MsgLookup.Message is equal to the provided 'cid'.
Without this check both the requested and original message may appear as
successfully executed on-chain, which may look like a double-spend.

A replacing message is a message with a different CID, any of Gas values, and
different signature, but with all other parameters matching (source/destination,
nonce, params, etc.)


Perms: read

Expand Down Expand Up @@ -4919,6 +4947,20 @@ StateWaitMsgLimited looks back up to limit epochs in the chain for a message.
If not found, it blocks until the message arrives on chain, and gets to the
indicated confidence depth.

NOTE: If a replacing message is found on chain, this method will return
a MsgLookup for the replacing message - the MsgLookup.Message will be a different
CID than the one provided in the 'cid' param, MsgLookup.Receipt will contain the
result of the execution of the replacing message.

If the caller wants to ensure that exactly the requested message was executed,
they MUST check that MsgLookup.Message is equal to the provided 'cid'.
Without this check both the requested and original message may appear as
successfully executed on-chain, which may look like a double-spend.

A replacing message is a message with a different CID, any of Gas values, and
different signature, but with all other parameters matching (source/destination,
nonce, params, etc.)


Perms: read

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