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pkg: use bigint instead of n64.
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@nodech
nodech committed Jun 19, 2023
1 parent aefc311 commit 02072f4
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Showing 5 changed files with 338 additions and 94 deletions.
6 changes: 3 additions & 3 deletions lib/script/opcode.js
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Original file line number Diff line number Diff line change
Expand Up @@ -212,13 +212,13 @@ class Opcode {

toNum(minimal, limit) {
if (this.value === opcodes.OP_0)
return ScriptNum.fromInt(0);
return ScriptNum.fromBigInt(0n);

if (this.value === opcodes.OP_1NEGATE)
return ScriptNum.fromInt(-1);
return ScriptNum.fromBigInt(-1n);

if (this.value >= opcodes.OP_1 && this.value <= opcodes.OP_16)
return ScriptNum.fromInt(this.value - 0x50);
return ScriptNum.fromBigInt(BigInt(this.value - 0x50));

if (!this.data)
return null;
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91 changes: 51 additions & 40 deletions lib/script/script.js
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Original file line number Diff line number Diff line change
Expand Up @@ -897,37 +897,38 @@ class Script extends bio.Struct {
if (stack.length < 1)
throw new ScriptError('INVALID_STACK_OPERATION', op, ip);

let num = stack.getNum(-1, minimal, 4);
let binum = stack.getNum(-1, minimal, 4).toBigInt();
let cmp;

switch (op.value) {
case opcodes.OP_1ADD:
num.iaddn(1);
binum = bigInt64(binum + 1n);
break;
case opcodes.OP_1SUB:
num.isubn(1);
binum = bigInt64(binum - 1n);
break;
case opcodes.OP_NEGATE:
num.ineg();
binum = bigInt64(-binum);
break;
case opcodes.OP_ABS:
num.iabs();
if (binum < 0n)
binum = bigInt64(-binum);
break;
case opcodes.OP_NOT:
cmp = num.isZero();
num = ScriptNum.fromBool(cmp);
cmp = binum === 0n;
binum = cmp ? 1n : 0n;
break;
case opcodes.OP_0NOTEQUAL:
cmp = !num.isZero();
num = ScriptNum.fromBool(cmp);
cmp = binum !== 0n;
binum = BigInt(cmp);
break;
default:
assert(false, 'Fatal script error.');
break;
}

stack.pop();
stack.pushNum(num);
stack.pushNum(ScriptNum.fromBigInt(binum));

break;
}
Expand All @@ -947,59 +948,59 @@ class Script extends bio.Struct {
if (stack.length < 2)
throw new ScriptError('INVALID_STACK_OPERATION', op, ip);

const n1 = stack.getNum(-2, minimal, 4);
const n2 = stack.getNum(-1, minimal, 4);
const bn1 = stack.getNum(-2, minimal, 4).toBigInt();
const bn2 = stack.getNum(-1, minimal, 4).toBigInt();

let num, cmp;
let binum, cmp;

switch (op.value) {
case opcodes.OP_ADD:
num = n1.iadd(n2);
binum = bigInt64(bn1 + bn2);
break;
case opcodes.OP_SUB:
num = n1.isub(n2);
binum = bigInt64(bn1 - bn2);
break;
case opcodes.OP_BOOLAND:
cmp = n1.toBool() && n2.toBool();
num = ScriptNum.fromBool(cmp);
cmp = bn1 !== 0n && bn2 !== 0n;
binum = BigInt(cmp);
break;
case opcodes.OP_BOOLOR:
cmp = n1.toBool() || n2.toBool();
num = ScriptNum.fromBool(cmp);
cmp = bn1 !== 0n || bn2 !== 0n;
binum = BigInt(cmp);
break;
case opcodes.OP_NUMEQUAL:
cmp = n1.eq(n2);
num = ScriptNum.fromBool(cmp);
cmp = bn1 === bn2;
binum = BigInt(cmp);
break;
case opcodes.OP_NUMEQUALVERIFY:
cmp = n1.eq(n2);
num = ScriptNum.fromBool(cmp);
cmp = bn1 === bn2;
binum = BigInt(cmp);
break;
case opcodes.OP_NUMNOTEQUAL:
cmp = !n1.eq(n2);
num = ScriptNum.fromBool(cmp);
cmp = bn1 !== bn2;
binum = BigInt(cmp);
break;
case opcodes.OP_LESSTHAN:
cmp = n1.lt(n2);
num = ScriptNum.fromBool(cmp);
cmp = bn1 < bn2;
binum = BigInt(cmp);
break;
case opcodes.OP_GREATERTHAN:
cmp = n1.gt(n2);
num = ScriptNum.fromBool(cmp);
cmp = bn1 > bn2;
binum = BigInt(cmp);
break;
case opcodes.OP_LESSTHANOREQUAL:
cmp = n1.lte(n2);
num = ScriptNum.fromBool(cmp);
cmp = bn1 <= bn2;
binum = BigInt(cmp);
break;
case opcodes.OP_GREATERTHANOREQUAL:
cmp = n1.gte(n2);
num = ScriptNum.fromBool(cmp);
cmp = bn1 >= bn2;
binum = BigInt(cmp);
break;
case opcodes.OP_MIN:
num = ScriptNum.min(n1, n2);
binum = bn1 < bn2 ? bn1 : bn2;
break;
case opcodes.OP_MAX:
num = ScriptNum.max(n1, n2);
binum = bn1 > bn2 ? bn1 : bn2;
break;
default:
assert(false, 'Fatal script error.');
Expand All @@ -1008,7 +1009,7 @@ class Script extends bio.Struct {

stack.pop();
stack.pop();
stack.pushNum(num);
stack.pushNum(ScriptNum.fromBigInt(binum));

if (op.value === opcodes.OP_NUMEQUALVERIFY) {
if (!stack.getBool(-1))
Expand All @@ -1022,11 +1023,11 @@ class Script extends bio.Struct {
if (stack.length < 3)
throw new ScriptError('INVALID_STACK_OPERATION', op, ip);

const n1 = stack.getNum(-3, minimal, 4);
const n2 = stack.getNum(-2, minimal, 4);
const n3 = stack.getNum(-1, minimal, 4);
const n1 = stack.getNum(-3, minimal, 4).toBigInt();
const n2 = stack.getNum(-2, minimal, 4).toBigInt();
const n3 = stack.getNum(-1, minimal, 4).toBigInt();

const val = n2.lte(n1) && n1.lt(n3);
const val = n2 <= n1 && n1 < n3;

stack.pop();
stack.pop();
Expand Down Expand Up @@ -2457,6 +2458,16 @@ function checksig(msg, sig, key) {
return secp256k1.verify(msg, sig.slice(0, -1), key);
}

/**
* Make sure number is int64.
* @param {BigInt} value
* @returns {BigInt}
*/

function bigInt64(value) {
return BigInt.asIntN(64, value);
}

/*
* Expose
*/
Expand Down
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