diff options
author | Determinant <[email protected]> | 2019-10-01 13:28:55 -0400 |
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committer | Determinant <[email protected]> | 2019-10-01 13:28:55 -0400 |
commit | bc43122f54ed8de21f74ee6393549c9554d732e8 (patch) | |
tree | 549fffb8771dd280b29eec1e8691e67eb4b24895 /rpc | |
parent | 841b2b7225a9318718c3c856a9debdf01bc4f061 (diff) |
support "accepted" as block number in JSON-RPC
Diffstat (limited to 'rpc')
-rw-r--r-- | rpc/types.go | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/rpc/types.go b/rpc/types.go new file mode 100644 index 0000000..7312397 --- /dev/null +++ b/rpc/types.go @@ -0,0 +1,77 @@ +// Copyright 2015 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package rpc + +import ( + "fmt" + "math" + "strings" + + "github.com/ava-labs/go-ethereum/common/hexutil" +) + +type BlockNumber int64 + +const ( + AcceptedBlockNumber = BlockNumber(-3) + PendingBlockNumber = BlockNumber(-2) + LatestBlockNumber = BlockNumber(-1) + EarliestBlockNumber = BlockNumber(0) +) + +// UnmarshalJSON parses the given JSON fragment into a BlockNumber. It supports: +// - "latest", "earliest" or "pending" as string arguments +// - the block number +// Returned errors: +// - an invalid block number error when the given argument isn't a known strings +// - an out of range error when the given block number is either too little or too large +func (bn *BlockNumber) UnmarshalJSON(data []byte) error { + input := strings.TrimSpace(string(data)) + if len(input) >= 2 && input[0] == '"' && input[len(input)-1] == '"' { + input = input[1 : len(input)-1] + } + + switch input { + case "earliest": + *bn = EarliestBlockNumber + return nil + case "latest": + *bn = LatestBlockNumber + return nil + case "pending": + *bn = PendingBlockNumber + return nil + case "accepted": + *bn = AcceptedBlockNumber + return nil + } + + blckNum, err := hexutil.DecodeUint64(input) + if err != nil { + return err + } + if blckNum > math.MaxInt64 { + return fmt.Errorf("Blocknumber too high") + } + + *bn = BlockNumber(blckNum) + return nil +} + +func (bn BlockNumber) Int64() int64 { + return (int64)(bn) +} |